Acid spray gun for waste acid cracking furnace

Abstract

The utility model relates to the technical field of sulfuric acid regeneration, specifically an acid spray gun for a waste acid cracking furnace, comprising a sulfuric acid spray pipe and a purge cooling sleeve, one end of the sulfuric acid spray pipe is provided with an atomizing nozzle, and the other end of the sulfuric acid spray pipe is provided with a waste sulfuric acid flange pipe for connecting an external waste sulfuric acid feeding pipeline to feed the acid spray gun; the purge cooling sleeve is sleeved outside the sulfuric acid spray pipe, and a plurality of cooling holes are evenly distributed on the purge cooling sleeve, and the purge cooling sleeve is provided with a compressed air pipe for connecting an external air supply device. The acid spray gun structure of the utility model adopts an external purge cooling sleeve to protect the internal sulfuric acid spray pipe, and the cooling effect of the part of the body in the acid spray gun furnace is realized through the system, and the corrosive medium can be effectively prevented from contacting the acid spray gun body in reverse by the uniform introduction of compressed air, which has a significant anti-corrosion effect and effectively improves the service life, and has the characteristics of simple operation, easy implementation, and easy monitoring.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid regeneration, in particular to an acid spray gun for a waste acid cracking furnace. Background Art

[0002] Waste sulfuric acid is extremely common and difficult to handle in industrial production, and it is easy to cause environmental pollution incidents. Waste sulfuric acid industry is produced in the nitration, esterification, sulfonation, alkylation, catalysis and gas drying processes of organic matter, or in the production of titanium dioxide, steel pickling and gas drying processes. Generally, it is necessary to use a cracking furnace to further process sulfuric acid. The process method of using an acid spray gun to perform atomization and high-temperature cracking inside the cracking furnace consumes waste sulfuric acid to produce new acid.

[0003] The general structure of the acid spray gun is a long rod-shaped round tube with an atomizing nozzle installed on the head. The temperature of the waste acid in the cracking furnace is above 1000°C. Since there is a large amount of acid mist and acid gas in the cracking furnace during the cracking of the waste acid, the acid spray gun is very easy to corrode and perforate in a high temperature environment, causing production interruption.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a new type of high temperature and corrosion resistant waste acid cracking furnace acid spray gun is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In view of the defects of the prior art mentioned above, the purpose of the utility model is to provide an acid spray gun for a waste acid cracking furnace to solve the problem of corrosion perforation of the acid spray gun in a high-temperature corrosive environment.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an acid spray gun for a waste acid cracking furnace, comprising a sulfuric acid spray pipe and a purge cooling sleeve, an atomizing nozzle is arranged at one end of the sulfuric acid spray pipe, and a waste sulfuric acid flange pipe is arranged at the other end of the sulfuric acid spray pipe, which is used to connect an external waste sulfuric acid feed pipeline to feed the acid spray gun; the purge cooling sleeve is sleeved outside the sulfuric acid spray pipe, a plurality of cooling holes are evenly distributed on the purge cooling sleeve, and the purge cooling sleeve is provided with a compressed air pipe for connecting an external air supply device.

[0007] Furthermore, the purge cooling sleeve is provided with a plurality of axially extending heat dissipation fins, and the plurality of heat dissipation fins are evenly distributed along the circumferential direction.

[0008] Furthermore, a plurality of the cooling holes are arranged in a grid pattern on the purge cooling sleeve, and axially extending heat dissipation fins are provided between two adjacent rows of cooling holes.

[0009] Furthermore, a connecting plate is provided on the outer wall of the purge cooling jacket, and the acid spray gun is detachably connected to the cracking furnace via the connecting plate.

[0010] Furthermore, the connecting plate is a circular plate with a hole in the middle, and the connecting plate is welded to the purge cooling sleeve.

[0011] Furthermore, the connecting plate is arranged at one end of the purge cooling sleeve away from the atomizing nozzle, and a plurality of cooling holes are located between the atomizing nozzle and the connecting plate.

[0012] Furthermore, the inner diameter of the purge cooling jacket is larger than the outer diameter of the sulfuric acid nozzle, and there is a space for compressed air to flow between the inner wall of the purge cooling jacket and the outer wall of the sulfuric acid nozzle.

[0013] Furthermore, the sulfuric acid nozzle passes through the purge cooling jacket and extends out of both ends of the purge cooling jacket, and both ends of the purge cooling jacket are welded to the sulfuric acid nozzle.

[0014] Furthermore, the compressed air connecting pipe is provided with a compressed air flow monitoring system at the inlet.

[0015] The beneficial effects of the utility model are as follows: the acid spray gun structure of the utility model adopts an external purge cooling sleeve to protect the internal sulfuric acid spray pipe, and the cooling effect of the part of the body in the acid spray gun furnace is realized through the system, and the corrosive medium can be effectively prevented from reversely contacting the acid spray gun body through the uniform introduction of compressed air, which has a significant anti-corrosion effect and effectively improves the service life. At the same time, it has the characteristics of simple operation, easy implementation, and easy monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an acid spray gun for a waste acid cracking furnace of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the sulfuric acid nozzle;

[0018] Figure 3 It is a schematic diagram of the structure of the purge cooling jacket;

[0019] In the figure: 1. sulfuric acid nozzle, 2. atomizing nozzle, 3. connecting plate, 4. waste sulfuric acid flange connecting pipe, 5. purge cooling sleeve, 5.1 cooling hole, 5.2 cooling fin, 6. compressed air connecting pipe, 7. compressed air flow monitoring system. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0021] See attached Figure 1-3 A kind of acid spray gun for waste acid cracking furnace comprises a sulfuric acid spray pipe 1 and a purge cooling jacket 5, wherein an atomizing nozzle 2 is arranged at one end of the sulfuric acid spray pipe 1, and a waste sulfuric acid flange pipe 4 is arranged at the other end of the sulfuric acid spray pipe 1 for connecting an external waste sulfuric acid feeding pipeline for feeding the acid spray gun; the purge cooling jacket 5 is sleeved outside the sulfuric acid spray pipe 1, and a plurality of cooling holes 5.1 are evenly distributed on the purge cooling jacket 5, and the purge cooling jacket 5 is provided with a compressed air pipe 6 for connecting an external air supply device.

[0022] Furthermore, the purge cooling jacket 5 is provided with a plurality of axially extending heat dissipation fins 5.2, which are evenly distributed along the circumferential direction. The plurality of cooling holes 5.1 are arranged in a grid pattern on the purge cooling jacket 5, and axially extending heat dissipation fins are provided between two adjacent rows of cooling holes.

[0023] Furthermore, a connecting plate 3 is provided on the outer wall of the purge cooling jacket 5 , and the acid spray gun is detachably connected to the cracking furnace via the connecting plate 3 .

[0024] Furthermore, the connecting plate 3 is a circular plate with a hole in the middle, and the connecting plate 3 is welded to the purge cooling jacket 5 .

[0025] Furthermore, the connecting plate 3 is arranged at one end of the purge cooling sleeve 5 away from the atomizing nozzle 2 , and the heat dissipation fins 5 . 2 and the plurality of cooling holes 5 . 1 are located between the atomizing nozzle 2 and the connecting plate 3 .

[0026] Furthermore, the inner diameter of the purge cooling jacket 5 is larger than the outer diameter of the sulfuric acid nozzle 1 , and there is a space for compressed air to flow between the inner wall of the purge cooling jacket 5 and the outer wall of the sulfuric acid nozzle 1 .

[0027] Furthermore, the sulfuric acid nozzle 1 passes through the purge cooling jacket 5 and extends out of both ends of the purge cooling jacket 5 , and both ends of the purge cooling jacket 5 are connected to the sulfuric acid nozzle 1 by welding.

[0028] Furthermore, the compressed air connecting pipe 6 is provided with a compressed air flow monitoring system 7 at the inlet, and the compressed air flow monitoring system 7 is used to monitor the compressed air flow pressure.

[0029] Preferably, the compressed air flow monitoring system 7 can use a metal tube float flowmeter with a flow range of 0-100 standard cubic meters per hour.

[0030] The utility model provides a novel acid spray gun device for a waste acid cracking furnace, comprising an internal sulfuric acid spray pipe 1, an atomizing nozzle 2, a connecting plate 3, a waste sulfuric acid flange pipe 4, an external finned purge cooling jacket 5, a compressed air pipe 6, and a compressed air flow monitoring system 7. The internal sulfuric acid spray pipe 1, the atomizing nozzle 2, the waste sulfuric acid flange pipe 4, and the external finned purge cooling jacket 5 are all made of nickel-based alloy or higher materials; the connecting plate 3 and the compressed air pipe 6 should be made of 316L or higher materials.

[0031] The internal sulfuric acid nozzle 1 is used for conveying waste sulfuric acid to the acid spray gun, and a waste sulfuric acid flange 4 is provided at the right end thereof for connecting an external feed pipeline to feed the acid spray gun system. The internal sulfuric acid nozzle 1 is provided with an atomizing nozzle 2 at the left end thereof, through which the waste sulfuric acid is conveyed to the furnace and sprayed by the atomizing nozzle.

[0032] The purge cooling sleeve 5 with external fins is used for purge cooling of the acid spray gun, and the connecting plate 3 is used for fixing the acid spray gun system on the cracking furnace and realizing quick disassembly; the purge cooling sleeve 5 is provided with uniform cooling holes 5.1, and the cooling hole edge is provided with a heat dissipation fin 5.2 structure. The right end of the purge cooling sleeve with external fins is connected to the compressed air pipe 6; the compressed air pipe 6 is connected to the external air supply device and the compressed air flow monitoring system 7; it is used to adjust the compressed air and has a flow pressure monitoring function, through which the cooling effect of the part of the body in the acid spray gun furnace is realized, and the corrosive medium can be effectively prevented from contacting the acid spray gun body in reverse by the uniform introduction of compressed air. The compressed air adjustment and flow pressure monitoring system can realize the function of adjusting the pressure flow, which can effectively control the purge cooling effect of the acid gun and ensure that the amount of air entering the cracking furnace meets the needs of process production.

[0033] The acid spray gun of this embodiment has been used in the 22,000 tons / year waste acid regeneration device of Hengli Group (Dalian) Refining and Chemical Co., Ltd. After using the modified acid gun device, it has a significant anti-corrosion effect, proving its good practicality; at the same time, it has the characteristics of simple operation, easy implementation, and easy monitoring.

[0034] Before changing the pipeline protection: the waste acid spray gun leaked frequently, and the acid spray gun needed to be repaired and welded every 3 months, and the service life did not exceed one year. After the modification of the acid spray gun, the device has been running stably for nearly 2 years, and no obvious signs of corrosion were found through monitoring.

[0035] It should be noted that the parts not described in detail in the present invention are prior art.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 referred device or element 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.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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 present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. An acid spray gun for a waste acid cracking furnace, characterized in that: It comprises a sulfuric acid spray pipe and a purge cooling sleeve, wherein an atomizing nozzle is arranged at one end of the sulfuric acid spray pipe, and a waste sulfuric acid flange pipe is arranged at the other end of the sulfuric acid spray pipe for connecting an external waste sulfuric acid supply pipeline to supply the acid spray gun; the purge cooling sleeve is sleeved outside the sulfuric acid spray pipe, a plurality of cooling holes are evenly distributed on the purge cooling sleeve, and a compressed air pipe is arranged on the purge cooling sleeve for connecting an external air supply device.

2. The acid spray gun for a waste acid cracking furnace according to claim 1, characterized in that: The purge cooling sleeve is provided with a plurality of axially extending heat dissipation fins, and the plurality of heat dissipation fins are evenly distributed along the circumferential direction.

3. The acid spray gun for a waste acid cracking furnace according to claim 2, characterized in that: The plurality of cooling holes are arranged in a grid pattern on the purge cooling sleeve, and axially extending heat dissipation fins are arranged between two adjacent rows of cooling holes.

4. The acid spray gun for a waste acid cracking furnace according to claim 1, characterized in that: The outer wall of the purge cooling jacket is provided with a connecting plate, and the acid spray gun is detachably connected to the cracking furnace via the connecting plate.

5. The acid spray gun for a waste acid cracking furnace according to claim 4, characterized in that: The connecting plate is a circular plate with a hole in the middle, and the connecting plate is welded to the purge cooling sleeve.

6. The acid spray gun for a waste acid cracking furnace according to claim 4, characterized in that: The connecting plate is arranged at one end of the purge cooling sleeve away from the atomizing nozzle, and a plurality of cooling holes are located between the atomizing nozzle and the connecting plate.

7. The acid spray gun for a waste acid cracking furnace according to claim 1, characterized in that: The inner diameter of the purge cooling jacket is larger than the outer diameter of the sulfuric acid nozzle, and there is a space for compressed air to flow between the inner wall of the purge cooling jacket and the outer wall of the sulfuric acid nozzle.

8. The acid spray gun for a waste acid cracking furnace according to claim 1, characterized in that: The sulfuric acid nozzle passes through the purge cooling jacket and extends out of both ends of the purge cooling jacket. Both ends of the purge cooling jacket are welded and connected to the sulfuric acid nozzle.

9. The acid spray gun for a waste acid cracking furnace according to claim 1, characterized in that: The compressed air connecting pipe is provided with a compressed air flow monitoring system at the inlet.

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