CN203333769U

CN203333769U - Corrosion-resistant heating coiled pipe of oil-field storage tank

Info

Publication number: CN203333769U
Application number: CN2013203146839U
Authority: CN
Inventors: 潘宏文; 惠会明; 杨锋; 李岩; 林辉; 陈怀兵; 李世勇
Original assignee: Petrochina Changqing Oilfield Co
Current assignee: Petrochina Changqing Oilfield Co
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-12-11
Anticipated expiration: 2023-06-03

Abstract

The utility model relates to a corrosion-resistant heating coiled pipe of an oil-field storage tank. A sacrifice anode plate is connected on the heating coiled pipe, so that united protection for current of the sacrifice anode is carried out onto the heating coiled pipe; meanwhile, a corrosion inhibition film is coated on the inner wall of the heating coiled pipe, and a corrosion-resistant protective layer is coated on the outer wall of the heating coiled pipe, so that the corrosion of the heating medium to the inner wall in a high-temperature environment is eliminated; the contact between the heating coiled pipe and the corrosion medium in the storage tank is isolated, so that the corrosion of external medium to the outer surface of the heating coiled pipe is eliminated. By virtue of internal and external combination, the corrosion of an internal medium and an external medium of the heating coiled pipe to the material of the coiled pipe can be effectively eliminated, and the service life of the heating coiled pipe can be effectively prolonged. Moreover, the corrosion-resistant heating coiled pipe of the oil-field storage tank is simple in structure, convenient to use and good in protective effect to the heating pipeline, so that technical support is provided for the normal operation of the oil-field production.

Description

The anticorrosion heating coil of lease tank

Technical field

The utility model belongs to lease tank heating coil aseptic technic field, particularly a kind of effectively rot-resistant storage tank heat coil pipe.

Background technology

For a long time, the most epoxy zinc-rich coating antiseptic technique that adopts of heating coil, due to the low level coil pipe in recovered water, erosion rate is fast, and acceptable life is shorter, often because the low level coil pipe occurs that the 1 run-down point in place causes coil pipe normally to use, in storage tank, crude oil heating, heat insulation function are lost, the external handing-over of normal operation in storehouse, impact station winter and crude oil, need to carry out tank clearly and safeguard, input cost is high, the organization of production difficulty is large.

Summary of the invention

In order to overcome the fast problem of the existing erosion rate of heating coil of the prior art, the utility model provides the anticorrosion heating coil of lease tank that a kind of resistance to corrosion improves, life cycle extends.

The utility model solves the problems of the technologies described above adopted technical scheme: comprise water inlet pipe and rising pipe, an end of water inlet pipe and rising pipe is connected by pipe connecting, between water inlet pipe and rising pipe, by conducting strip, is connected with the sacrificial anode plate.

The inwall of above-mentioned water inlet pipe, rising pipe and pipe connecting is coated with corrosion inhibiting film.

Be coated with corrosion protective covering on the outer wall of above-mentioned water inlet pipe, rising pipe and pipe connecting.

Above-mentioned sacrificial anode plate is the Al-Zn-In-Cr alloy sheets.

The anticorrosion heating coil of lease tank of the present utility model is by connect the sacrificial anode plate on heating coil, heating coil is carried out to the Combined Protection of sacrificial anode electric current, inwall at heating coil applies corrosion inhibiting film simultaneously, outer wall applies corrosion protective covering, eliminated like this heating medium under hot environment inwall has been caused to corrosion, isolate contacting of heating coil and corrosive medium in storage tank simultaneously, eliminated the corrosion of extraneous medium to the heating coil outside surface, the combination of inner and outside, can effectively eliminate heating coil in, the corrosion of outer medium to the coil pipe material, effectively extend the work-ing life of heating coil, and the utility model is simple in structure, easy to use, protection to the heating pipeline is effective, for the normal operation of field produces provides technical support.

The accompanying drawing explanation

The structural representation that Fig. 1 is embodiment.

The A that Fig. 2 is Fig. 1 is to view.

Embodiment

Now by reference to the accompanying drawings the technical solution of the utility model is further described, but the utility model is not limited only to the situation of following enforcement.

Referring to Fig. 1 and Fig. 2, the heating coil of the present embodiment is connected and is formed by pipe connecting 1, water inlet pipe 2, conducting strip 3, sacrificial anode plate 4, rising pipe 5, corrosion protective covering 6 and corrosion inhibiting film 7.

The water inlet pipe 2 of the present embodiment and rising pipe 5 are welded to connect the U-shaped tubular construction of all-in-one-piece by the pipe connecting 1 of half-circle-arc shape, water inlet pipe 2, rising pipe 5 and pipe connecting 1 all adopt common carbon steel material to make, be coated with one deck within it on wall and process formed corrosion inhibiting film 7 by micro amount of oxygen oxygen scavenger and high temperature inhibition prefilming agent, in order to eliminate under hot environment the corrosion that heating medium causes inwall, at water inlet pipe 2, on the outer wall of rising pipe 5 and pipe connecting 1, be coated with by the formed corrosion protective covering 6 of hydrophobic nanometer high temperature resistance coating, its superpower sticking power, can reach 21.9MPa with the sticking power of carbon steel base material, and be that a kind of non-porous infiltration is filmed, there is good resistance to elevated temperatures and coating performance, heat conductivity, can adopt the brushing mode to be evenly coated on each pipeline outer wall, isolated contacting of each pipeline outer wall and corrosive medium in storage tank, eliminated the corrosion of extraneous medium to each pipeline external surface.Connect sacrificial anode plate 4 by conducting strip 3 between water inlet pipe 2 and rising pipe 5, its two ends are connected on water inlet pipe 2, rising pipe 5 by conducting strip 3 respectively, the present embodiment can adopt bikini to be welded to connect, this sacrificial anode plate 4 is to adopt the Al-Zn-In-Cr alloy material to make,-1.25V～-1.20V, enough negative potentials are arranged, and its also have anodic polarization little, be uniformly dissolved, current efficiency high (> 85%), the large (> 2400Ah/kg of electrical capacity) etc. advantage, therefore can effectively play the effect that the modification sacrificial anode is combined protection.

Claims

1. the anticorrosion heating coil of lease tank, comprise water inlet pipe (2) and rising pipe (5), one end of water inlet pipe (2) and rising pipe (5) is connected by pipe connecting (1), it is characterized in that: between water inlet pipe (2) and rising pipe (5), by conducting strip (3), be connected with sacrificial anode plate (4).

2. the anticorrosion heating coil of lease tank according to claim 1, it is characterized in that: the inwall of described water inlet pipe (2), rising pipe (5) and pipe connecting (1) is coated with corrosion inhibiting film (7).

3. the anticorrosion heating coil of lease tank according to claim 1, is characterized in that: on the outer wall of described water inlet pipe (2), rising pipe (5) and pipe connecting (1), be coated with corrosion protective covering (6).

4. the anticorrosion heating coil of lease tank according to claim 1, it is characterized in that: described sacrificial anode plate (4) is the Al-Zn-In-Cr alloy sheets.