CN213120145U - High-temperature flue gas channel structure of rotary reaction furnace - Google Patents

Abstract

The utility model relates to a rotary reaction furnace field discloses a rotary reaction furnace high temperature flue gas access structure. This high temperature flue gas access structure, including barrel and flue gas pipeline, flue gas pipeline sets up in the barrel, the barrel is provided with air inlet and gas outlet, flue gas pipeline's both ends are linked together with air inlet and gas outlet respectively, flue gas pipeline's both ends are connected with the inlet box respectively and give vent to anger the case, the inlet box is connected with the air inlet of barrel, it is connected with the gas outlet of barrel to go out the case, and each air inlet distributes on at least two-layer cross section of barrel, and each gas outlet distributes on at least two cross sections of barrel, and each inlet box or each gas outlet case are at the circumference of barrel upwards spiral arrangement. In the flue gas channel structure, each air inlet box or each air outlet box is arranged spirally in the circumferential direction of the cylinder body, so that the air inlet boxes or the air outlet boxes have a certain material copying function, the materials can be driven to move, the materials are heated more uniformly, and more sufficient pyrolysis is obtained.

Description

High-temperature flue gas channel structure of rotary reaction furnace

Technical Field

The utility model belongs to the technical field of rotary reaction furnace and specifically relates to a rotary reaction furnace high temperature flue gas access structure.

Background

It is known that: the rotary kiln or the rotary reaction furnace is widely used in the industries of chemical industry, cement, lime and the like, and is used for rotary equipment for calcining or pyrolyzing corresponding materials. A single-cylinder rotary reaction furnace for coal chemical industry, the material in its section of thick bamboo is the low grade coal generally, and direct heating with high temperature flue gas can take place burning or explosion, consequently can not be with high temperature flue gas direct contact, must adopt the form of indirect heating. Wherein, the common heating mode is heating with a double-layer cylinder structure; another heating mode is heating by a flue gas pipeline in the cylinder.

For example, patent application with publication number CN110440582A discloses a multitubular double-layer furnace body rotary reaction furnace, which combines the above two heating modes, on one hand, high-temperature flue gas flows through between the inner and outer cylinders to heat the inner cylinder, on the other hand, the high-temperature flue gas passes through the air inlet box through the air inlet on the inner cylinder and then enters the flue gas pipeline uniformly distributed in the inner cylinder, the high-temperature flue gas heats the flue gas pipeline wall, the rotary reaction furnace rotates and drives the material in the cylinder to move, the material is in contact with the flue gas pipeline wall to exchange heat with the flue gas pipeline wall, and then sufficient pyrolysis is obtained, and the flue gas after heat exchange is discharged from the air outlet of the cylinder through the tail of the flue gas pipeline. In order to ensure sufficient and uniform heating, the flue gas pipeline is generally distributed along the circumferential direction and has certain density, so that a material frying plate or a spiral plate can not be arranged at the position where the flue gas pipeline is arranged, the material stirring function of the rotary furnace can be weakened, and the rotary furnace is not beneficial to uniform heating of materials.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a rotary reaction furnace high temperature flue gas channel structure is provided, the homogeneity that the material is heated is improved.

The utility model discloses a gyration reacting furnace high temperature flue gas access structure, including barrel and flue gas pipeline, the flue gas pipeline sets up in the barrel, the barrel is provided with air inlet and gas outlet, the both ends of flue gas pipeline are linked together with air inlet and gas outlet respectively, the both ends of flue gas pipeline are connected with the inlet box respectively and give vent to anger the case, the inlet box is connected with the air inlet of barrel, it is connected with the gas outlet of barrel to go out the case, and each air inlet distributes on at least two-layer cross section of barrel, and each gas outlet distributes on at least two cross sections of barrel, and each inlet box or each gas outlet case are at the circumference of barrel upwards spiral arrangement.

Preferably, an expansion joint is arranged between the flue gas pipeline and the air outlet box or between the flue gas pipeline and the air inlet box.

Preferably, the air inlet box is located at one end, close to the furnace tail, of the flue gas pipeline, the air outlet box is located at one end, close to the furnace end, of the flue gas pipeline, and the expansion joint is located between the flue gas pipeline and the air outlet box.

Preferably, each of the air intake boxes is arranged spirally in the circumferential direction of the cylinder.

Preferably, two air inlet boxes adjacent in the circumferential direction are distributed on two different sets of spirals, and the distance between the two sets of spirals in the length direction of the cylinder is larger than the diameter of the air inlet.

Preferably, each air outlet is distributed on two layers of cross sections of the cylinder body, and two circumferentially adjacent air outlets are distributed on different cross sections of the cylinder body.

Preferably, the flue gas pipeline is of a flat pipe structure, and one side of the flue gas pipeline close to the inner wall of the cylinder body inclines towards the front of the rotation direction of the rotary reaction furnace.

Preferably, the air inlet box and the air outlet box are of elbow structures, the air inlet and the air outlet are both located on the side wall of the barrel, and the air inlet box and the air outlet box are respectively welded with the air inlet and the air outlet.

Preferably, the air inlet box and the air outlet box are both provided with an insertion pipe joint, one end of each insertion pipe joint is connected with the corresponding air inlet box or air outlet box, the other end of each insertion pipe joint is provided with an outward-turning edge structure, and the outward-turning edge structure is in butt welding with the edge of the corresponding air inlet or air outlet.

The utility model has the advantages that: the air inlet and the air outlet of the high-temperature flue gas channel structure of the rotary reaction furnace are arranged on at least two cross sections, so that the weakening of the strength of the cylinder body due to the arrangement of the air inlet and the air outlet can be effectively reduced; each air inlet box or each air outlet box is arranged in a spiral mode in the circumferential direction of the barrel, so that the air inlet boxes or the air outlet boxes can play a certain material copying function on the basis of the air inlet and outlet functions of the air inlet boxes or the air outlet boxes, materials can be moved, the materials are heated more uniformly, more sufficient pyrolysis is obtained, and the problem that special material copying structures such as material copying plates are not convenient to set due to the arrangement of the air inlet boxes or the air outlet boxes can be solved.

Drawings

FIG. 1 is a schematic view of the installation structure of the high-temperature flue gas channel structure of the rotary reaction furnace of the present invention;

3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a cross-sectional view C-C of FIG. 2;

FIG. 5 is a cross-sectional view D-D of FIG. 3; .

FIG. 6 is a cross-sectional view of E-E of FIG. 1;

fig. 7 is a schematic view of the arrangement of the air inlets.

Reference numerals: the device comprises a cylinder body 1, an insertion pipe joint 2, an air inlet box 3, a flue gas pipeline 4, an expansion joint 5, an air outlet box 6, a furnace end 7, a furnace tail 8, an odd-number air inlet 9 and an even-number air inlet 10.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a rotary reaction furnace high temperature flue gas access structure, including barrel 1 and flue gas pipeline 4, flue gas pipeline 4 sets up in barrel 1, barrel 1 is provided with air inlet and gas outlet, flue gas pipeline 4's both ends are linked together with air inlet and gas outlet respectively, flue gas pipeline 4's both ends are connected with air inlet box 3 respectively and give vent to anger case 6, air inlet box 3 is connected with barrel 1's air inlet, it is connected with barrel 1's gas outlet to go out gas case 6, and each air inlet distributes on barrel 1's at least two-layer cross section, and each gas outlet distributes on barrel 1's at least two cross sections, and each air inlet box 3 or each gas outlet 6 upwards spiral arrangement in barrel 1's circumference.

The utility model can be used for the double-layer rotary furnace as in the background technology and can also be used for the single-cylinder rotary furnace. Taking a single-cylinder rotary reaction furnace in coal chemical industry as an example, the material is generally inferior coal, and when the material is heated, if the material is directly contacted with high-temperature flue gas, the combustion and even explosion can occur, so that only indirect heating can be adopted. As shown in fig. 1, flue gas enters a flue gas pipeline 4 from an air inlet of a cylinder 1 through an air inlet box 3, then passes through an air outlet box 6, and is exhausted from an air outlet of the cylinder 1 to form an independent flue gas channel; when the barrel body 1 rotates, materials in the barrel body are driven to move, and the materials are in contact with the wall of the high-temperature flue gas pipeline 4 and exchange heat with the wall of the high-temperature flue gas pipeline 4, so that the indirect heating process of the materials is realized. As shown in fig. 2 and 3, the air inlet box 3 and the air outlet box 6 are circumferentially arranged, and more flue gas pipelines 4 are circumferentially arranged in order to increase the heat exchange area, so that the strength of the cylinder 1 can be influenced to a certain extent, and in order to solve the problem, the air inlets are not distributed on the same cross section, but are arranged in a staggered manner, and a certain distance is staggered between the two layers, so that the weakening of the air inlet to the cylinder 1 can be reduced, and the strength of the cylinder 1 can be ensured; similarly, the air outlet is also the same. On this basis, the spiral that each air inlet still adopted arranges, and corresponding inlet box 3 also is the spiral and arranges, and inlet box 3 that arranges like this has certain material function of copying, can take the material motion, makes the material be heated more evenly, obtains abundant pyrolysis, reduces because of being difficult to arrange the influence that the spiral flitch of frying brought.

The high-temperature flue of the rotary reaction furnace is in a high-temperature state for a long time, and the flue gas pipeline 4 can deform under the action of high temperature, especially has large axial deformation, so that a large axial acting force is generated, the acting force of the joint of the air inlet box 3 and the air outlet box 6 with the cylinder body 1 is large, cracks easily occur at the joint, and the service life of the high-temperature flue is shortened. For this purpose, an expansion joint 5 is arranged between the flue gas duct 4 and the outlet box 6 or between the flue gas duct 4 and the inlet box 3. The expansion joint 5 is used for buffering the axial deformation of the flue gas pipeline 4, so that the damage of pipeline connection caused by deformation can be avoided.

The newly-added material moves to stove tail 8 from furnace end 7, and furnace end 7 temperature demand is lower relatively, therefore as preferred embodiment, inlet box 3 is located the one end that flue gas pipeline 4 is close to stove tail 8, it is located the one end that flue gas pipeline 4 is close to furnace end 7 to go out gas tank 6, more accords with the material heating demand. On the basis of this, the burner 7 is cooler, so that, as shown in fig. 1, the expansion joint 5 is preferably arranged between the flue gas duct 4 and the outlet box 6. The expansion joint 5 is arranged at one end with relatively low temperature, so that the service life of the expansion joint can be prolonged to a certain extent. Each air inlet box 3 can be arranged spirally, the air outlet box 6 can be arranged spirally, or both the air inlet box 3 and the air outlet box can be arranged spirally, considering that the air inlet box 3 is closer to the furnace tail 8, more material needs to be copied at the position to enhance the uniformity of heating, and therefore, each air inlet box 3 is preferably arranged spirally in the circumferential direction of the cylinder body 1. In the embodiment shown in fig. 1, each air outlet is distributed on two layers of cross sections of the cylinder 1, and two circumferentially adjacent air outlets are distributed on different cross sections of the cylinder 1. If the air outlets are numbered in the circumferential sequence, one layer can be provided with odd ports, and the other layer can be provided with even ports.

For the inlet box that the spiral was arranged, if all inlet boxes all were located same set of spiral, unless the pitch of spiral is very big, the distance between the adjacent air inlet just too is close, and the weakening to the barrel is very big, and the inlet box is if adopt the pitch spiral to arrange, then can make the inlet box occupy the very long length of barrel, is unfavorable for the setting of internals, in order to solve this problem, in preferred embodiment, two adjacent inlet boxes distribute in two sets of spirals of difference in the week, and two sets of spirals are greater than the diameter of air inlet at the interval of barrel length direction. If the air inlets are numbered in the circumferential sequence, one of the two circumferentially adjacent air inlets is an odd-numbered air inlet 9, and the other is an even-numbered air inlet 10. As shown in fig. 7, the odd inlet 9 is located on one set of spiral, and the even inlet 10 is located on the other set of spiral, and correspondingly, the odd inlet box and the even inlet box are respectively located on two different sets of spiral, so as to ensure that the distance P between the two sets of spiral is greater than the diameter of the inlet, and reduce the strength of the inlet to the cylinder 1 to the greatest extent and maintain the material-making effect of the inlet box under the condition that the length of the inlet box 3 arranged in the axial direction of the cylinder 1 is shortened.

Besides the material-making effect of the air inlet box 3 and the air outlet box 6, the flue gas pipeline 4 also has a certain material-making effect. Conventional flue gas pipeline 4 is circular usually, for improving the material effect of copying, increases the material area of being heated, and flue gas pipeline 4 is flat tubular construction, and flat tubular construction's cross-section can be regular ellipse, also can be the big little goose egg shape of one end as shown in the figure. The flue gas pipeline 4 with the flat tube structure is easy to accumulate materials between the flue gas pipeline and the inner wall of the cylinder body 1, so that the heat exchange efficiency is reduced, and one side, close to the inner wall of the cylinder body 1, of the flue gas pipeline 4 inclines towards the front of the rotation direction of the rotary reaction furnace. As shown in figure 6, the arrow indicates the rotation direction of rotary furnace, one side that flue gas pipeline 4 is close to barrel 1 inner wall is towards the rotation direction slope, flue gas pipeline 4 that the slope set up is favorable to the material to be driven when the well high point along the slow landing of flue gas pipeline outer wall under the action of gravity by flue gas pipeline, thereby reduce the pulverization degree of material, and avoid producing long-pending material problem, improve the heat exchange efficiency of flue gas pipeline 4 and material, make the material be heated more evenly, and can reduce the atress of flue gas pipeline 2, prolong its life.

Air inlet box 3 and air outlet box 6 can adopt current square structure, nevertheless the utility model discloses well preferred elbow structure that adopts, its simple structure can adopt rolling preparation, and the preparation is comparatively convenient, and the security is also higher. For the air inlet box 3 and the air outlet box 6 with the elbow structures, an air inlet and an air outlet can be arranged on the side wall of the barrel body 1, and the air inlet box 3 and the air outlet box 6 are respectively welded with the air inlet and the air outlet. As shown in fig. 4 and 5, in order to ensure the welding stability and reduce the thermal stress of the weld joint, the air inlet box 3 and the air outlet box 6 are both provided with an intubation joint 2, one end of the intubation joint 2 is connected with the corresponding air inlet box 3 or air outlet box 6, and the other end of the intubation joint has an everting edge structure which is butt-welded with the edge of the corresponding air inlet or air outlet. The pipe inserting joint 2 can be integrally formed with the corresponding air inlet box 3 or air outlet box 6, and can also be welded on the corresponding air inlet box 3 or air outlet box 6 after being machined and manufactured. The eversion edge structure of the pipe inserting joint 2 can be used for changing welding into butt welding, so that the thermal stress is reduced, and the quality of a welding seam is improved.

Claims (9)

1. High-temperature flue gas channel structure of rotary reaction furnace, including barrel (1) and flue gas pipeline (4), flue gas pipeline (4) set up in barrel (1), barrel (1) is provided with air inlet and gas outlet, the both ends of flue gas pipeline (4) are linked together with air inlet and gas outlet respectively, its characterized in that, the both ends of flue gas pipeline (4) are connected with air inlet box (3) and air outlet box (6) respectively, air inlet box (3) are connected with the air inlet of barrel (1), air outlet box (6) are connected with the gas outlet of barrel (1), and each air inlet distributes on at least two-layer cross section of barrel (1), and each air outlet distributes on two at least cross sections of barrel (1), and each air inlet box (3) or each air outlet box (6) are at the upwards spiral arrangement of circumference of barrel (1).

2. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 1, wherein: and an expansion joint (5) is arranged between the flue gas pipeline (4) and the gas outlet box (6) or between the flue gas pipeline (4) and the gas inlet box (3).

3. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 2, wherein: the gas inlet box (3) is located at one end, close to a furnace tail (8), of the flue gas pipeline (4), the gas outlet box (6) is located at one end, close to a furnace head (7), of the flue gas pipeline (4), and the expansion joint (5) is located between the flue gas pipeline (4) and the gas outlet box (6).

4. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 1, 2 or 3, wherein: the air inlet boxes (3) are spirally arranged in the circumferential direction of the cylinder body (1).

5. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 4, wherein: two air inlet boxes adjacent in the circumferential direction are distributed on two different sets of spirals, and the distance between the two sets of spirals in the length direction of the cylinder body is larger than the diameter of the air inlet.

6. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 1, 2 or 3, wherein: each air outlet is distributed on the two layers of cross sections of the cylinder body (1), and two air outlets adjacent in the circumferential direction are distributed on different cross sections of the cylinder body (1).

7. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 1, wherein: the flue gas pipeline (4) is of a flat pipe structure, and one side, close to the inner wall of the barrel body (1), of the flue gas pipeline (4) inclines towards the front of the rotary reaction furnace in the rotating direction.

8. The rotary reaction furnace high-temperature flue gas channel structure as claimed in claim 1, wherein: the air inlet box (3) and the air outlet box (6) are of elbow structures, the air inlet and the air outlet are both located on the side wall of the barrel body (1), and the air inlet box (3) and the air outlet box (6) are respectively welded with the air inlet and the air outlet.

9. The rotary reaction furnace high-temperature flue gas channel structure according to claim 8, wherein: the air inlet box (3) and the air outlet box (6) are both provided with an insertion pipe joint (2), one end of the insertion pipe joint (2) is connected with the corresponding air inlet box (3) or the corresponding air outlet box (6), the other end of the insertion pipe joint is provided with an outward turning edge structure, and the outward turning edge structure is in butt welding with the edge of the corresponding air inlet or air outlet.

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