Spray pipe

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a spray pipe, which solves the problem that the existing spray pipe is easy to deform or short in service life, and is provided with a steel pipe, a first flange, a second flange, an inner anti-corrosion layer and an outer anti-corrosion layer, a transverse pipe section and a vertical pipe section of the steel pipe are connected through a 90-degree bent pipe section, a first flange is sleeved, welded and fixed on the transverse pipe section, and an inner ring of a second flange is hermetically welded and connected with a pipe opening part of the transverse pipe section; with the flowing direction of liquid in the transverse pipe section as the front-back direction, the inner anti-corrosion layer adheres to the inner wall of the steel pipe and extends to the rear end face of the second flange, and the extending part also serves as an anti-corrosion sealing gasket between the second flange and the conveying pipeline flange; the outer anti-corrosion layer adheres to the outer wall of the vertical pipe section, the outer wall of the 90-degree bent pipe section and part of the outer wall of the transverse pipe section and extends to the front end face of the first flange, and the extending part also serves as an anti-corrosion sealing gasket between the first flange and the spray tower installation flange. The inner anti-corrosion layer and the outer anti-corrosion layer are connected into a whole at the end of a pipe opening of the vertical pipe section.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field especially a kind of spray pipe. BACKGROUND

[0002] In chemical production and environmental protection treatment, the process of a kind of chemical reaction is carried out by spraying liquid into reactor, for example, a production method of hydrochloric acid is to spray water in the upper part of reactor, water and hydrochloric acid gas, which is introduced into the lower part of spray head, are combined to form hydrochloric acid, and for another example, when treating waste gas, the acidic or alkaline waste gas to be treated is introduced into reactor (also called spray tower), and liquid capable of neutralizing waste gas is used to spray and wash waste gas in the upper part of waste gas, so that gas and liquid can be fully contacted.

[0003] Spray pipe is an important part of such reaction equipment, which penetrates through the wall of reactor, the inner end is connected with spray head, and the outer end is connected with liquid pipeline. The existing spray pipe has the following defects: one type of spray pipe uses plastic pipe resistant to corrosion. After long-term use, the plastic pipe will be bent, the inner end will be lowered, the spray head will deviate from the original central position, and the effect of spray reaction will be affected. In addition, in order to achieve the effect of spraying, the spray liquid is delivered under pressure, and the internal pressure will also cause the downward straight bend section of the plastic pipe to deform, and the designed spray direction will also be changed. Another type of spray pipe is made of rare metal resistant to corrosion, such as iridium and tantalum. However, such spray pipe can only be used for 2-3 years in some reactors with heavy acid-base degree, and needs to be replaced at that time. These defects are also related to high temperature in the reactor. SUMMARY

[0004] The utility model solves the technical problems: provide a kind of spray pipe, overcome the problem of easy deformation or short service life of existing spray pipe.

[0005] The utility model solves the technical problems and adopts the technical scheme: a kind of spray pipe, with steel pipe, first flange, second flange, inner anticorrosive layer and outer anticorrosive layer.

[0006] The steel pipe has horizontal pipe section and vertical pipe section, the horizontal pipe section and the vertical pipe section are connected by 90 ° elbow pipe section, the first flange is sleeved and welded and fixed on the horizontal pipe section of steel pipe, and the inner ring of the second flange is hermetically welded and connected with the pipe opening part of horizontal pipe section.

[0007] First mounting hole corresponding to mounting hole on the installation flange of spray tower is arranged on the first flange, and second mounting hole corresponding to connecting hole on the connecting flange on the conveying pipeline is arranged on the second flange.

[0008] The inner anticorrosion layer adheres to the inner wall of the steel pipe and extends to the rear end face of the second flange, and the extension of the inner anticorrosion layer on the rear end face of the second flange serves as an anticorrosion sealing gasket between the second flange and the connecting flange on the conveying pipeline; the outer anticorrosion layer adheres to the outer wall of the vertical pipe section, the outer wall of the 90° elbow pipe section and part of the outer wall of the horizontal pipe section and extends to the front end face of the first flange, and the extension of the outer anticorrosion layer on the front end face of the first flange serves as an anticorrosion sealing gasket between the first flange and the installation flange of the spray tower.

[0009] The inner anticorrosion layer and the outer anticorrosion layer are connected into one body at the pipe opening end of the vertical pipe section.

[0010] Specifically, the inner anticorrosion layer and the outer anticorrosion layer are PFA adhesive layers.

[0011] Specifically, the inner anticorrosion layer at the vertical pipe section is provided with an inner thread for screwing the spray head.

[0012] Specifically, in order to assist in increasing the flow rate of liquid entering the spray head, improving the spraying effect and facilitating the setting of the inner thread of the spray head on the inner anticorrosion layer, the front section inner anticorrosion layer on the horizontal pipe section gradually increases in thickness from rear to front, and the increased thickness is maintained to the inner thread of the vertical pipe section.

[0013] The spray pipe of the utility model makes two flanges and a steel pipe into a framework adhered with anticorrosion layers, the strength of the steel pipe guarantees the rigidity and internal pressure bearing capacity of the spray pipe, the anticorrosion layers can use nonmetallic corrosion-resistant materials to significantly improve the anticorrosion capacity, and the service life of the spray pipe is long; when PFA material is further used, the high temperature resistance can be improved, the extension of the anticorrosion layer on the flange and the structure that the extension is clamped by two flanges after the spray pipe is installed make the adhesion of the anticorrosion layer more firm, and meanwhile, the flanges are also protected from corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments described in the application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0015] Figure 1 It is the sectional view of the utility model.

[0016] In the drawing: 1, steel pipe, 1-1, horizontal pipe section, 1-2, vertical pipe section, 1-3, 90° elbow pipe section;

[0017] 2, first flange, 2-1, first installation hole;

[0018] 3. The second flange, 3-1, second mounting hole;

[0019] 4. Inner anticorrosion layer;

[0020] 5. Outer anticorrosion layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] As shown in the accompanying drawings Figure 1 A spray pipe has a steel pipe 1, a first flange 2, a second flange 3, an inner anticorrosion layer 4 and an outer anticorrosion layer 5. The steel pipe 1 has a horizontal pipe section 1-1 and a vertical pipe section 1-2, the horizontal pipe section 1-1 and the vertical pipe section 1-2 are connected by a 90° elbow pipe section 1-3, the first flange 2 is sleeved and welded on the horizontal pipe section 1-1 of the steel pipe 1, and the inner ring of the second flange 3 is connected with the pipe opening part of the horizontal pipe section 1-1 by airtight welding. The first flange 2 is provided with a first mounting hole 2-1 corresponding to the mounting hole of the installation flange of the spray tower, and the second flange 3 is provided with a second mounting hole 3-1 corresponding to the connecting hole of the connecting flange on the conveying pipeline. The inner anticorrosion layer 4 is adhered to the inner wall of the steel pipe 1 and extends to the rear end face of the second flange 3, and the extension part of the inner anticorrosion layer 4 on the rear end face of the second flange 3 serves as a corrosion sealing gasket between the second flange 3 and the connecting flange on the conveying pipeline. The outer anticorrosion layer 5 is adhered to the outer wall of the vertical pipe section 1-2, the outer wall of the 90° elbow pipe section 1-3 and part of the outer wall of the horizontal pipe section 1-1 and extends to the front end face of the first flange 2, and the extension part of the outer anticorrosion layer 5 on the front end face of the first flange 2 serves as a corrosion sealing gasket between the first flange 2 and the installation flange of the spray tower. The inner anticorrosion layer 4 and the outer anticorrosion layer 5 are integrated at the pipe opening end of the vertical pipe section 1-2, the inner anticorrosion layer 4 and the outer anticorrosion layer 5 are PFA adhesive layers, PFA is a fusible polytetrafluoroethylene, the inner anticorrosion layer 4 at the vertical pipe section 1-2 is provided with an inner thread for screwing a spray head, the front section of the inner anticorrosion layer 4 on the horizontal pipe section 1-1 gradually increases in thickness from back to front, and the rear section of the inner anticorrosion layer 4 on the horizontal pipe section 1-1 maintains the same thickness, that is, the inner anticorrosion layer 4 on the horizontal pipe section 1-1 is divided into two sections, the front section with a change in thickness and the rear section with no change in thickness. The increased thickness remains until the 90° elbow pipe section 1-3 and the vertical pipe section 1-2.

[0023] The length of the riser section 1-2 is short as it is only used to mount the spray head.

[0024] The manufacturing process of the utility model can put the welded assembly and the anticorrosive material powder together in the mold with core mold according to the property of the used anticorrosive material, melt the anticorrosive material by heating the mold, and then cool and demold, so that the cooled anticorrosive material after melting adheres to the set surface of the welded part.

[0025] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A spray pipe, characterized in that: It has a steel pipe (1), a first flange (2), a second flange (3), an inner anti-corrosion layer (4), and an outer anti-corrosion layer (5); The steel pipe (1) has a horizontal pipe section (1-1) and a vertical pipe section (1-2), which are connected by a 90° bend pipe section (1-3). The first flange (2) is fitted and welded to the horizontal pipe section (1-1) of the steel pipe (1), and the inner ring of the second flange (3) is sealed and welded to the pipe opening of the horizontal pipe section (1-1). The first flange (2) is provided with a first mounting hole (2-1) corresponding to the mounting hole on the spray tower mounting flange, and the second flange (3) is provided with a second mounting hole (3-1) corresponding to the connecting hole on the connecting flange on the conveying pipeline; With the liquid flow direction in the horizontal pipe section (1-1) of the spray pipe as the front-to-back direction, the inner anti-corrosion layer (4) adheres to the inner wall of the steel pipe (1) and extends to the rear end face of the second flange (3). The extension of the inner anti-corrosion layer (4) on the rear end face of the second flange (3) also serves as an anti-corrosion sealing gasket between the second flange (3) and the connecting flange on the conveying pipeline. The outer anti-corrosion layer (5) adheres to the outer wall of the riser section (1-2), the outer wall of the 90° bend section (1-3), and part of the outer wall of the horizontal pipe section (1-1) and extends to the front end face of the first flange (2). The extension of the outer anti-corrosion layer (5) on the front end face of the first flange (2) also serves as an anti-corrosion sealing gasket between the first flange (2) and the spray tower mounting flange. The inner anti-corrosion layer (4) and the outer anti-corrosion layer (5) are connected as one unit at the pipe end of the riser section (1-2).

2. A spray pipe according to claim 1, characterized in that: The inner anti-corrosion layer (4) and the outer anti-corrosion layer (5) are PFA adhesion layers.

3. A spray pipe according to claim 1, characterized in that: The inner anti-corrosion layer (4) at the riser section (1-2) is provided with an internal thread for screwing on the spray head.

4. A spray pipe according to claim 3, characterized in that: The thickness of the front inner anti-corrosion layer (4) on the horizontal pipe section (1-1) gradually increases from back to front.

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