CN219341774U - Liquid sulfur spray gun structure - Google Patents

Abstract

The utility model belongs to the technical field of liquid sulfur acid making equipment, and particularly relates to a liquid sulfur spray gun structure, which comprises a furnace body connecting flange, a spray gun body outer pipe, a steam jacket pipe and a liquid sulfur pipe, wherein the furnace body connecting flange is used for being connected with a furnace body, the spray gun structure sequentially comprises the liquid sulfur pipe, the steam jacket pipe and the spray gun body outer pipe from inside to outside, and the spray gun structure further comprises an axial sliding sleeve, wherein the inner wall of the axial sliding sleeve is tightly welded and fixed on the outer wall of the middle section of the spray gun body outer pipe, and the outer wall of the axial sliding sleeve is tightly and slidably arranged on the inner wall of the furnace body connecting flange, so that the spray gun body outer pipe can freely slide when expanding with heat and contracting with cold. The spray gun structure effectively solves the common problems of bending of the spray gun body, fatigue loss of the wave-type compensator, leakage of steam and the like in the sulfur furnace body, and ensures the long-period stable operation of the sulfuric acid device.

Description

Liquid sulfur spray gun structure

Technical Field

The utility model belongs to the technical field of equipment for preparing acid from liquid sulfur, and particularly relates to a liquid sulfur spray gun structure.

Background

In the device for preparing the acid by the sulfur, a liquid sulfur spray gun is important sulfur atomization combustion equipment of sulfur incinerator equipment, the inner pipe of the sulfur spray gun body is used for conveying 130-145 ℃ of liquid sulfur, heat preservation steam is used outside the liquid sulfur pipe and is 0.2-0.5MPa and 120-150 ℃, the conveying of the liquid sulfur and the cooling of the gun body (relative to the high temperature in the furnace) are ensured through heat exchange, and the equipment directly influences the long-period safe and stable operation of the sulfuric acid device.

In a chemical device for preparing acid by sulfur, a typical structure adopted by a liquid sulfur spray gun is as follows: as shown in fig. 1, the sulfur spray gun body has a three-layer pipe structure (comprising a spray gun body outer pipe 1, a steam jacket pipe 2 and a liquid sulfur pipe 3), and a wave-shaped compensator 4 is arranged at the inner side of a furnace body connecting flange sulfur burning furnace; the following problems are mainly existed in the actual production and use process: the process air at 70 ℃ at the outlet of a drying tower is dried by a sulfur spray gun during normal operation, a certain cooling effect is provided for a sulfur spray gun body in a sulfur burning furnace box, the thermal expansion of an outer tube of the spray gun body is 5mm below zero, but when the device is stopped temporarily due to failure, the internal heat radiation of a furnace body can cause the ambient temperature of the sulfur spray gun to rise to 500-600 ℃, at the moment, the thermal expansion of the outer tube of the spray gun body is 15-20mm, and the rigidity of the gun body of the sulfur spray gun body can be reduced under the process condition; under the effects of rigidity reduction and thermal stress, the gun body outer tube forms a thermal bending phenomenon; after the sulfur spray gun body is bent, the liquid sulfur atomization combustion center is deviated, so that mixed combustion of process gas and liquid sulfur after atomization is affected, and the fire-resistant lining of the sulfur incinerator equipment is possibly overheated and damaged when serious; and secondly, the wave type compensator arranged on the sulfur spray gun body at the inner side of the sulfur incinerator has thinner wall thickness, and is extremely easy to cause steam leakage of the compensator under the conditions of repeated thermal stress and corrosive sulfuric acid mist, thereby influencing the safety of a boiler system and a conversion catalyst.

In order to solve the problems, the research and development of the liquid sulfur spray gun with the novel structure meeting the production process requirements is very necessary to ensure the long-period safe and stable operation of the sulfuric acid device.

Disclosure of Invention

Aiming at the technical problems in the background technology, the utility model provides a liquid sulfur spray gun structure, solves the problems of bending of a sulfur spray gun in sulfur burning furnace equipment and steam leakage caused by failure of a wave type compensator, and ensures the long-period safe and stable operation of a sulfuric acid device.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a liquid sulfur spray gun structure, includes furnace body flange, spray gun body outer tube, steam jacket pipe, the liquid sulfur pipe that is used for being connected with the furnace body, spray gun structure is liquid sulfur pipe, steam jacket pipe and the outer tube of spray gun body from inside to outside in proper order, still includes the axial sliding sleeve, the outer wall welded fastening of the outer pipe intermediate section of spray gun is hugged closely to the inner wall of axial sliding sleeve, the inner wall slip setting of furnace body flange is hugged closely to the outer wall of axial sliding sleeve to can freely slide when making the outer tube of spray gun expend with heat and contract with cold.

Optionally, the liquid sulfur spray gun structure further comprises a sheath pipe, the tail end of the liquid sulfur pipe is fixedly provided with a gun head connecting piece, the sheath pipe is sleeved outside the steam jacket pipe, one end of the sheath pipe is fixed on the furnace body connecting flange, and the other end of the sheath pipe is fixedly connected with the gun head connecting piece.

Optionally, a flexible packing seal is filled between the inner wall of the furnace body connecting flange and the outer wall of the axial sliding sleeve, and the flexible packing seal is pressed and fixed through a packing gland.

Optionally, a wave type compensator is arranged on the outer tube of the spray gun body outside the furnace body.

Optionally, a steam inlet is arranged on the outer pipe of the spray gun body outside the furnace body, a steam outlet is arranged on the steam jacket pipe outside the furnace body, one end of the outer pipe of the spray gun body is communicated with one end of the steam jacket pipe, and the other end of the outer pipe of the spray gun body is isolated by adopting a second annular plate welding.

Optionally, a liquid sulfur connecting flange is fixed on the end face of the steam jacket pipe and the liquid sulfur pipe outside the furnace body.

Optionally, a plurality of arc cushion blocks are uniformly distributed on the circumference of the inner wall of the tail end of the steam jacket pipe, and the inner wall of the arc cushion block is tightly attached to the outer wall of the liquid sulfur pipe.

Optionally, the inner wall of the tail end of the sheath tube is provided with a first annular plate, and the inner wall of the first annular plate is tightly attached to the outer wall of the gun head connecting piece.

The utility model has the following advantages and beneficial effects:

according to the spray gun structure, aiming at the problems that a sulfur spray gun bends in sulfur burning furnace equipment and a wave type compensator fails and leaks steam, an axial sliding sleeve (welded and fixed on the outer tube of a spray gun body) and a filler sealing structure are arranged between the outer tube of a third layer of spray gun of a liquid sulfur spray gun and a furnace body connecting flange, so that the spray gun can axially and freely slide and seal a flue gas medium in the furnace body under the thermal expansion stress of the outer tube; and the thermal expansion force of the protective sleeve and the outer tube of the spray gun body is transmitted to the wave compensator to be eliminated. Finally, the wave-type compensator is arranged on the outer pipe of the spray gun body at the outer side of the furnace body connecting flange, and the spray gun works under the air at the ambient temperature, so that the operation working condition is better improved, and the visual inspection and early defect discovery are facilitated. The structure is easy to implement, actively and easily inspect and maintain, has obvious effect of preventing the spray gun body in the furnace body from bending and the wave type compensator from fatigue failure, and can effectively ensure the long-period stable operation of the liquid sulfur spray gun equipment in the sulfur acid making device.

Drawings

FIG. 1 is a schematic illustration of a typical structure of a liquid sulfur lance prior to modification;

FIG. 2 is a schematic view of a first liquid sulfur lance provided by the utility model;

FIG. 3 is a schematic view of a second liquid sulfur lance provided by the utility model;

icon: 1-protective sleeve, 11-annular plate I, 2-spray gun body outer tube, 21-steam inlet, 22-annular plate II, 3-steam jacket tube, 4-liquid sulfur tube, 41-gun head connecting piece, 42-arc cushion block, 43-steam outlet, 5-axial sliding sleeve, 6-flexible packing seal, 7-furnace body connecting flange, 8-packing gland, 9-wave type compensator and 10-liquid sulfur connecting flange.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 2, a liquid sulfur lance structure mainly includes: the spray gun comprises a spray gun body outer tube 2, a steam jacket tube 3, a liquid sulfur tube 4, an axial sliding sleeve 5, a flexible filler seal 6, a furnace body connecting flange 7 for connecting with a furnace body, a filler gland 8, a wave type compensator 9 and the like.

As shown in fig. 2, the liquid sulfur spray gun has a three-layer structure in and out of the furnace (namely, the left and right sides of the furnace body connecting flange 7), and the spray gun structure comprises a liquid sulfur pipe 4, a steam jacket pipe 3 and a spray gun body outer pipe 2 from inside to outside. The inner wall of the axial sliding sleeve 5 is tightly fixed against the outer wall of the middle section of the outer tube 2 of the spray gun body, and is preferably welded and fixed. The outer wall of the axial sliding sleeve 5 is tightly attached to the inner wall of the furnace body connecting flange 7 in a sliding manner, so that the outer tube 2 of the spray gun body can freely slide when expanding with heat and contracting with cold. A flexible packing seal 6 is filled between the inner wall of the furnace body connecting flange 7 and the outer wall of the axial sliding sleeve 5, and is pressed and fixed through a packing gland 8.

Namely, an axial sliding sleeve 5 (welded and fixed on the outer wall of the outer tube 2) and a flexible packing seal 6 are arranged between the outer tube 2 of the third layer of the outer tube 2 of the furnace body connecting flange 7 of the liquid sulfur spray gun, so that the outer tube 2 of the spray gun can slide freely in the axial direction under the thermal expansion stress, and the gun body can be prevented from bending and simultaneously can seal a flue gas medium in the furnace body to prevent the flue gas from channeling outwards.

Further, a wave type compensator 9 is arranged on the outer pipe 2 of the spray gun body outside the furnace body (i.e. on the left side of the furnace body connecting flange 7 in fig. 2), and the compensation amount is 15-20mm when the spray gun body works under the air with the ambient temperature. It can compensate the expansion and contraction of sulfur spray gun in furnace to prevent the bending caused by stress concentration.

Further, a liquid sulfur connecting flange 10 is fixed on the end surfaces of the steam jacket pipe 3 and the liquid sulfur pipe 4 outside the furnace body and is used for connecting with a pipeline for conveying liquid sulfur.

Further, a plurality of arc-shaped cushion blocks 42 are uniformly distributed on the circumference of the inner wall of the tail end of the steam jacket pipe 3, and the inner wall of each arc-shaped cushion block 42 is tightly attached to the outer wall of the liquid sulfur pipe 4. Specifically, the arc cushion block 42 is provided with 3 segmentation arc cushion blocks 42 that are 120 arrangement in steam jacket pipe 3 terminal port 20mm department, and welded fastening is in the liquid sulfur pipe 4 outside, effectively supports steam jacket pipe 3, guarantees axiality and the steam flow area of steam jacket pipe 3.

The liquid sulfur spray gun of the utility model adopts a whole tube without splicing, the tail end of the liquid sulfur tube 4 is welded with a gun head connecting piece 41, the defect leakage caused by splicing is reduced, and the gun head connecting piece 41 is used for being connected with a gun head (not shown in the figure).

As shown in fig. 3, the liquid sulfur spray gun has a three-layer structure outside the furnace (i.e. the left side of the furnace body connecting flange 7) and a four-layer structure inside the furnace (i.e. the right side of the furnace body connecting flange 7). The liquid sulfur spray gun is of a three-layer structure outside the furnace; the inner part of the furnace is of a four-layer structure, and is provided with the protective sleeve 1, so that the rigidity of the gun body part is effectively increased, and the gun body part is not easy to bend.

Specifically, sheath pipe 1 adopts heat-resisting corrosion-resistant 310S stainless steel material, and the end of liquid sulfur pipe 4 is fixed with rifle head connecting piece 41, and sheath pipe 1 cover is established in steam jacket pipe 3 outside, and sheath pipe 1 one end is fixed on furnace body flange 7, and sheath pipe 1 terminal inner wall is provided with annular plate one 11, annular plate one 11 inner wall hugs closely rifle head connecting piece 41 outer wall welded fastening.

According to the utility model, one end of the protective sleeve 1 is welded to the furnace body connecting flange 7 in strength, the annular plate 11 is adopted at one end, the protective sleeve 1 and the gun head 41 are connected together in strength welding, the expansion of the protective sleeve 1 in a high-temperature environment of 500-600 ℃ furnace gas is larger than that of the spray gun body outer tube 2 contacting 120-150 ℃ low-pressure heat preservation steam (the spray gun body outer tube 2 does not need to directly contact high temperature in the furnace), so that the protective sleeve 1 pulls the spray gun body outer tube 2 to expand towards the free end, the spray gun body outer tube 2 is pulled, the axial sliding sleeve 5 slides, and the wave compensator 9 effectively compensates the expansion, and the design can ensure the rigidity of the spray gun body outer tube 2 and avoid bending of the spray gun body.

Wherein, be provided with steam inlet 21 on the outer pipe 2 of the spray gun body outside the furnace body, be provided with steam outlet 43 on the steam jacket pipe 3 outside the furnace body, the outer pipe 2 of spray gun body and steam jacket pipe 3 one end intercommunication (i.e. the side that is in the stove promptly, furnace body flange 7 right side), the other end (i.e. the side that is in the outside of the stove promptly, furnace body flange 7 left side) adopts annular slab two 22 welding to isolate.

Through the optimization and improvement of the structure, the common problems of bending of the spray gun body in the sulfur furnace body, fatigue loss of the wave compensator 9, leakage of steam and the like are effectively solved, and the long-period stable operation of the sulfuric acid device is ensured.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a liquid sulphur spray gun structure, is including being used for furnace body flange (7) that are connected with the furnace body, spray gun body outer tube (2), steam jacket pipe (3), liquid sulphur pipe (4), spray gun structure is liquid sulphur pipe (4), steam jacket pipe (3) and spray gun body outer tube (2) from inside to outside in proper order, its characterized in that:

the novel spray gun is characterized by further comprising an axial sliding sleeve (5), wherein the inner wall of the axial sliding sleeve (5) is tightly attached to the outer wall of the middle section of the outer tube (2) of the spray gun body, and the outer wall of the axial sliding sleeve (5) is tightly attached to the inner wall of the connecting flange (7) of the furnace body in a sliding manner, so that the outer tube (2) of the spray gun body can freely slide when expanding with heat and contracting with cold.

2. The liquid sulfur lance structure of claim 1 wherein: still include sheath pipe (1), the end of liquid sulfur pipe (4) is fixed with rifle head connecting piece (41), sheath pipe (1) cover is established in the outside of spray gun body outer tube (2), and sheath pipe (1) one end is fixed on furnace body flange (7), and the other end and rifle head connecting piece (41) fixed connection.

3. The liquid sulfur lance structure according to claim 1 or 2, characterized in that: a flexible packing seal (6) is filled between the inner wall of the furnace body connecting flange (7) and the outer wall of the axial sliding sleeve (5), and is pressed and fixed through a packing gland (8).

4. A liquid sulfur lance structure according to claim 3, wherein: a wave type compensator (9) is arranged on the outer pipe (2) of the spray gun body outside the furnace body.

5. A liquid sulfur lance structure according to claim 3, wherein: a steam inlet (21) is arranged on the outer pipe (2) of the spray gun body outside the furnace body, a steam outlet (43) is arranged on the steam jacket pipe (3) outside the furnace body, and the tail end of the outer pipe (2) of the spray gun body is isolated from the steam jacket pipe (3) by welding through a second annular plate (22).

6. A liquid sulfur lance structure according to claim 3, wherein: a liquid sulfur connecting flange (10) is fixed on the end face of the steam jacket pipe (3) and the liquid sulfur pipe (4) outside the furnace body.

7. The liquid sulfur lance structure of claim 2 wherein: a plurality of arc-shaped cushion blocks (42) are uniformly distributed on the circumference of the inner wall of the tail end of the steam jacket pipe (3), and the inner wall of each arc-shaped cushion block (42) is tightly attached to the outer wall of the liquid sulfur pipe (4).

8. The liquid sulfur lance structure of claim 2 wherein: the inner wall of the tail end of the sheath tube (1) is provided with a first annular plate (11), and the inner wall of the first annular plate (11) is tightly attached to the outer wall of the gun head connecting part (41).

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