CN219482683U - Cracking furnace for preparing acetylene from natural gas - Google Patents

Abstract

The utility model provides a natural gas system acetylene cracking furnace, relates to cracking furnace technical field, and the technical scheme who adopts includes the reaction chamber, the reaction chamber includes barrel and the refractory lining of setting in the barrel, the refractory lining includes heat preservation and flame retardant coating, anchor skeleton has been buried inside the heat preservation, anchor skeleton includes two at least vertical skeletons of falling U type, a plurality of vertical skeletons are around the central axis central symmetry of reaction chamber, the heat preservation top is provided with the hoist and mount groove, the bending part of vertical skeleton protrusion hoist and mount groove and not surpass the upper surface of heat preservation; the vertical skeleton is provided with a plurality of annular skeletons along the direction of height equidistance. The utility model uses the anchoring framework to strengthen the connection between the layers of the heat preservation layer, and is provided with the hoisting groove, the bending part of the vertical framework is protruded from the hoisting groove to serve as a lifting lug, so that the problems of inconvenient hoisting and cracking of the traditional refractory lining are solved; the arc-shaped refractory bricks with smaller size are adopted to build the refractory layer, so that the service life is prolonged.

Description

Cracking furnace for preparing acetylene from natural gas

Technical Field

The utility model relates to the technical field of cracking furnaces, in particular to a cracking furnace for preparing acetylene from natural gas.

Background

The cracking furnace is key equipment in the process of preparing acetylene from natural gas, and mainly comprises a mixing section, a burner plate, a reaction chamber, a quenching zone and the like, wherein the oxidative thermal cracking reaction of methane occurs in the reaction chamber. The patent with the publication number of CN214051569U discloses a reaction chamber for improving acetylene yield, wherein a refractory pouring layer is arranged on the inner wall of a reaction chamber main body, a refractory brick layer is arranged on the inner side of the refractory pouring layer and is formed by building a plurality of layers of annular refractory bricks, and the uppermost refractory brick is provided with a chamfer angle towards the upper vertex angle of the central axis of the reaction chamber.

The refractory lining can be manufactured independently, and after the cracking furnace is installed, the refractory lining is integrally hoisted into the reaction chamber main body, but the structure of the refractory lining in the prior art is inconvenient to hoist; when the refractory lining is manufactured, a layer of refractory bricks is firstly built, then a layer of light castable is poured as a heat preservation layer, and the heat preservation layer is dried for more than three days and then manufactured in the next layer, and is formed by stacking a plurality of layers, so that the heat preservation layer is easy to split from a joint in use; the annular refractory bricks have higher requirements on the pressing process due to larger sizes, and the annular refractory bricks manufactured by common manufacturers have defects and generally have poor service lives.

Disclosure of Invention

Aiming at the problems that a refractory lining structure is not suitable for hoisting and an insulating layer is easy to crack in the prior art, the utility model provides a cracking furnace for preparing acetylene from natural gas.

The utility model provides the following technical scheme: the utility model provides a natural gas system acetylene cracking furnace, includes the reaction chamber, the reaction chamber includes barrel and the refractory lining of setting in the barrel, the refractory lining includes heat preservation and flame retardant coating, the anchor skeleton has been buried inside the heat preservation, the anchor skeleton includes two at least vertical skeletons of falling U type, and a plurality of vertical skeletons are around the central axis central symmetry of reaction chamber, the heat preservation top is provided with the hoist and mount groove, the bending part of vertical skeleton protrusion hoist and mount groove and do not surpass the upper surface of heat preservation; the vertical skeleton is provided with a plurality of annular skeletons along the direction of height equidistance.

Preferably, the refractory layer comprises a plurality of layers of refractory bricks, each layer of refractory bricks is built into a ring shape by a plurality of arc-shaped refractory bricks, and a bonding layer is arranged between two adjacent arc-shaped refractory bricks.

Preferably, the central angle of the arc-shaped refractory brick is 45 degrees.

Preferably, the top and one side end face of the arc-shaped refractory brick are provided with convex positioning strips, the bottom and the other side end face of the arc-shaped refractory brick are provided with positioning grooves, and the positioning strips are matched with the corresponding positioning grooves.

Preferably, one side of the arc refractory brick at the bottom of the refractory layer, facing the heat preservation layer, is also provided with an anchoring annular groove, and the heat preservation layer is provided with an anchoring convex ring matched with the anchoring annular groove.

Preferably, an L-shaped anchoring plate is further arranged between two upper and lower adjacent arc-shaped refractory bricks, one end of the anchoring plate is welded on the annular framework, and the other end of the anchoring plate is inserted into a slot reserved by the arc-shaped refractory bricks.

The beneficial effects of the utility model are as follows: the anchoring framework is used for reinforcing the connection between the layers of the heat preservation layer, and a hoisting groove is formed, and the bending part of the vertical framework is protruded from the hoisting groove to serve as a lifting lug, so that the problems of inconvenience in hoisting and cracking of the conventional refractory lining are solved; the arc-shaped refractory bricks with smaller size are adopted to build the refractory layer, so that the service life of the refractory layer is prolonged.

Drawings

Fig. 1 is a vertical cross-section of one embodiment of the present utility model.

Fig. 2 is a side view of one embodiment of the present utility model.

Fig. 3 is a transverse cross-sectional view of one embodiment of the present utility model.

FIG. 4 is a top view of one embodiment of an arcuate refractory brick of the present utility model.

Fig. 5 is a vertical cross-section of another embodiment of the present utility model.

Reference numerals: 10-heat preservation layers, 11-vertical frameworks, 12-hoisting grooves, 13-annular frameworks, 14-anchoring convex rings, 15-anchoring plates, 20-refractory layers, 21-arc refractory bricks, 211-positioning strips, 212-positioning grooves and 22-anchoring annular grooves.

Detailed Description

Embodiments of the present utility model will be described in more detail below with reference to the drawings and reference numerals, so that those skilled in the art can practice the present utility model after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The utility model provides a cracking furnace for preparing acetylene from natural gas, which is shown in fig. 1-4, and comprises a reaction chamber, wherein the reaction chamber comprises a cylinder body and a refractory lining arranged in the cylinder body, the cylinder body is a steel shell of the reaction chamber, and the refractory lining comprises an insulating layer 10 and a refractory layer 20. An anchoring framework is buried in the heat preservation layer 10, the anchoring framework comprises at least two inverted U-shaped vertical frameworks 11, the vertical frameworks 11 are symmetrical around the central axis of the reaction chamber, and a hoisting groove 12 is formed in the top of the heat preservation layer 10; the vertical skeleton 11 is provided with a plurality of annular skeletons 13 at equal intervals in the height direction.

The heat preservation layer 10 is formed by pouring alumina light castable and mainly plays a role in heat preservation. Before pouring, an anchoring framework is arranged at the pouring position, wherein the anchoring framework can adopt a 0Cr18Ni9 alloy rod, the vertical framework is of an inverted U shape and penetrates through the heat insulation layer 10 from top to bottom, the connection between the layers of the heat insulation layer 10 is reinforced, cracking is prevented when the heat insulation layer is used, meanwhile, the bending part of the vertical framework 11 protrudes out of a preset lifting groove 12 to serve as a lifting lug, and the lifting lug does not exceed the upper surface of the heat insulation layer 10, so that the heat insulation layer 10 and the installation of a gasket on a cylinder body are prevented from being influenced; the annular framework 13 strengthens the anchoring between the vertical framework 11 and the heat insulation layer 10, and further, the surfaces of the vertical framework 11 and the annular framework 13 are provided with transverse ribs similar to the surfaces of steel bars. The heat preservation layer 10 after pouring and the refractory layer 20 after building are integrated, and a lifting hook of the crane can be connected with a bending part of the vertical framework 11 to hoist the refractory lining into the cylinder.

The refractory layer 20 is constructed of refractory bricks and a bonding layer, and is in direct contact with the high-temperature gas, resistant to high temperature and resistant to scouring. Preferably, the refractory layer comprises a plurality of layers of refractory bricks, each layer of refractory bricks is built into a ring shape by a plurality of arc-shaped refractory bricks 21, and an adhesive layer is arranged between two adjacent arc-shaped refractory bricks 21 on the upper and lower sides and the left and right sides. Compared with the annular refractory bricks used in the prior art, the arc-shaped refractory bricks 21 are smaller in size, low in processing difficulty, stable in quality and relatively long in service life. The arc-shaped refractory bricks can be high-aluminum low-silicon bricks or zirconia-chromia corundum bricks, and the bonding layers can be corundum cement.

Preferably, the central angle of the arc-shaped refractory bricks 21 is 45 degrees. The layer of refractory bricks is built by 8 arc-shaped refractory bricks.

Preferably, the top and one side end surfaces of the arc-shaped refractory bricks 21 are provided with protruding positioning strips 211, the bottom and the other side end surfaces of the arc-shaped refractory bricks 21 are provided with positioning grooves 212, and the positioning strips 211 are matched with the corresponding positioning grooves 212 so as to facilitate masonry.

Preferably, an anchoring ring groove 22 is further provided on the side of the arc-shaped refractory brick 21 at the bottom of the refractory layer 20 facing the heat insulation layer 10, and the heat insulation layer 10 is provided with an anchoring convex ring 14 matched with the anchoring ring groove 22, so as to strengthen the connection between the heat insulation layer 10 and the refractory layer 20.

In another embodiment, an L-shaped anchoring plate 15 is further disposed between two adjacent arc-shaped refractory bricks 21, as shown in fig. 5, one end of the anchoring plate 15 is welded on the annular skeleton 13, the other end is inserted into a slot reserved by the arc-shaped refractory bricks 21, and the thickness of the anchoring plate 15 is consistent with the thickness of the adhesive layer, so that the connection between the heat insulation layer 10 and the refractory layer 20 is further enhanced.

The foregoing is a description of one or more embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (6)

1. The utility model provides a natural gas system acetylene cracking furnace, includes the reaction chamber, the reaction chamber includes barrel and sets up the refractory lining in the barrel, the refractory lining includes heat preservation (10) and flame retardant coating (20), its characterized in that: an anchoring framework is buried in the heat preservation layer (10), the anchoring framework comprises at least two inverted U-shaped vertical frameworks (11), the vertical frameworks (11) are symmetrical around the central axis of the reaction chamber, a hoisting groove (12) is formed in the top of the heat preservation layer (10), and the bending part of the vertical frameworks (11) protrudes out of the hoisting groove (12) and does not exceed the upper surface of the heat preservation layer (10); the vertical frameworks (11) are provided with a plurality of annular frameworks (13) at equal intervals along the height direction.

2. The cracking furnace for producing acetylene from natural gas according to claim 1, wherein: the fireproof layer comprises a plurality of layers of fireproof bricks, each layer of fireproof bricks is built into a ring shape by a plurality of arc fireproof bricks (21), and a bonding layer is arranged between two adjacent arc fireproof bricks (21).

3. The cracking furnace for producing acetylene from natural gas according to claim 2, wherein: the central angle of the arc-shaped refractory brick (21) is 45 degrees.

4. The cracking furnace for producing acetylene from natural gas according to claim 2, wherein: the top and one side terminal surface of arc resistant firebrick (21) all are provided with protruding locating strip (211), arc resistant firebrick (21) bottom and opposite side terminal surface are provided with constant head tank (212), locating strip (211) and corresponding constant head tank (212) cooperation.

5. The cracking furnace for producing acetylene from natural gas according to claim 2, wherein: an anchoring annular groove (22) is further formed in one side, facing the heat preservation layer (10), of the arc-shaped refractory bricks (21) at the bottom of the refractory layer (20), and the heat preservation layer (10) is provided with an anchoring convex ring (14) matched with the anchoring annular groove (22).

6. The cracking furnace for producing acetylene from natural gas according to claim 2, wherein: an L-shaped anchoring plate (15) is further arranged between the two upper and lower adjacent arc-shaped refractory bricks (21), one end of the anchoring plate (15) is welded on the annular framework (13), and the other end of the anchoring plate is inserted into a reserved slot of the arc-shaped refractory bricks (21).