CN212511080U - Evaporation section of steam injection boiler - Google Patents

Abstract

The utility model belongs to the technical field of the petroleum machine, especially, relate to a steam injection boiler evaporation zone, its characterized in that includes vertical structure's tube box frame, the elbow case that is connected with this tube box frame, the evaporation tube bank of setting in the tube box frame, the lower part interface that is connected with the transition section, the upper portion interface that is connected with the convection section, the evaporation zone tube entry that is connected with the export of radiation section tube, the evaporation zone tube export that is connected with the steam injection pipeline, the tube box frame includes side window frame and tube sheet, lay the heat preservation at this side window frame and tube sheet internal surface, evaporation tube bank is fixed by the tube sheet, evaporation tube bank arranges for horizontal serpentine's complete optical tube, connect with the elbow between the evaporation tube bank. The utility model discloses an annotate vapour boiler evaporation zone, utilize boiler evaporation zone to produce high dryness fraction steam, improve steam dryness fraction and steam quality, realize the high-efficient exploitation of viscous crude.

Description

Evaporation section of steam injection boiler

Technical Field

The utility model belongs to the technical field of the oil machinery, especially, relate to a steam injection boiler evaporation zone.

Background

The existing steam injection boiler adopts a direct current technical form, the steam-water flow is water supply, a heat exchanger shell pass, a convection section, a heat exchanger tube pass and a radiation section, steam with the dryness of 80 percent or less is generated from the radiation section according to a water treatment mode, and steam with higher dryness cannot be obtained in the radiation section.

Disclosure of Invention

The utility model aims at providing an annotate vapour boiler evaporation zone utilizes boiler evaporation zone to produce high dryness fraction steam, improves the steam quality.

The purpose of the utility model is realized by the following technical scheme:

the utility model is characterized in that the evaporation section of the steam injection boiler comprises a vertical pipe box frame, an elbow box connected with the pipe box frame, an evaporation pipe bundle arranged in the pipe box frame, a lower interface connected with the transition section, an upper interface connected with the convection section, an evaporation section pipe inlet connected with the radiation section pipe outlet, an evaporation section pipe outlet connected with the steam injection pipeline,

the tube box frame comprises a side window frame and a tube plate, and an insulating layer laid on the inner surfaces of the side window frame and the tube plate, the evaporation tube bundle is fixed by the tube plate,

the evaporation tube bundles are arranged in a full-light tube manner with a horizontal snake-shaped structure, and are connected by elbows.

The evaporation tube bundle is formed by combining a light pipe and a finned tube, the light pipe is positioned below the evaporation section, and the finned tube is positioned above the light pipe.

The utility model has the advantages that:

the utility model discloses an annotate vapour boiler evaporation zone, utilize boiler evaporation zone to produce high dryness fraction steam, improve steam dryness fraction and steam quality, realize the high-efficient exploitation of viscous crude.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a layout diagram of the evaporation section of the present invention.

Fig. 3 is a schematic view of the tube rack structure of the present invention.

Fig. 4 is a layout view of the evaporator tube bundle of the present invention.

Fig. 5 is a steam-water system diagram of the evaporation section of the present invention.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

As shown in figures 1-5, the evaporation section of the steam injection boiler of the utility model is characterized in that the evaporation section comprises a vertical pipe box frame 2, an elbow box 1 connected with the pipe box frame 2, an evaporation pipe bundle 3 arranged in the pipe box frame 2, a lower interface connected with a transition section 5, an upper interface connected with a convection section 4, an evaporation section pipe inlet connected with a radiation section pipe outlet, an evaporation section pipe outlet connected with a steam injection pipeline,

the tube box frame 2 comprises a side window frame 2-1 and a tube plate 2-2, an insulating layer 2-3 laid on the inner surfaces of the side window frame 2-1 and the tube plate 2-2, the evaporation tube bundle 3 is fixed by the tube plate 2-2,

the evaporation tube bundle 3 is a full-light tube 3-1 arrangement with a horizontal snake-shaped structure, and the evaporation tube bundle 3 is connected by an elbow.

The evaporation tube bundle 3 is formed by combining a light pipe and a finned tube 3-2, wherein the light pipe is positioned below the evaporation section 6, and the finned tube is positioned above the light pipe.

The utility model discloses an injection boiler evaporation zone adopts vertical structure, and the flue gas flows into the flue from 6 bottoms of evaporation zone, and the medium gets into evaporating pipe bundle 3 from 6 tops of evaporation zone, forms countercurrent flow. As shown in fig. 2, the lower interface of the evaporation section 6 is connected to the transition section 5, and the upper interface is connected to the convection section 4. The flue gas flows through the transition section 5, the evaporation section 6 and the convection section 4 from the bottom of the evaporation section 6 to the top in sequence. The working medium flows in from the first row of pipes and flows downwards. The flow directions of the flue gas and the working medium are opposite.

Referring to fig. 3, the pipe box frame 2 is formed by welding steel plates and comprises a side window frame 2-1 and a pipe plate 2-2, an insulating layer 2-3 is laid on the inner surfaces of the side window frame 2-1 and the pipe plate 2-2 to reduce the surface temperature of an evaporation section 6, and an evaporation pipe bundle 3 is fixed by the pipe plate 2-2.

As shown in FIG. 4, the evaporator tube bundle 3 is arranged by using a full light pipe 3-1 or a combination of a light pipe and a finned tube 3-2 to reduce the overall size of the evaporation section 6. The evaporation tube bundle 3 is of a horizontal snake-shaped structure, and the evaporation tube bundle 3 is connected by adopting an elbow to form a complete heating surface. When the light pipe and finned tube combination 3-2 is adopted for arrangement, the light pipe is positioned below the evaporation section 6, and the finned tube is positioned above the light pipe.

As shown in fig. 5, the inlet of the evaporation section pipe is connected with the outlet of the radiation section pipe for further improving the dryness of the steam at the outlet of the radiation section, and the outlet of the evaporation section pipe is connected with a steam injection pipeline for injecting steam. The evaporation section 6 is used for connecting the transition section 5 and the convection section 4, the transition section 5 is arranged below the evaporation section, and the convection section 4 is arranged above the evaporation section. The flow direction of the flue gas is a transition section 5, an evaporation section 6 and a convection section 4; the working medium flow direction is a radiation section, an evaporation section 6 and a steam outlet.

The utility model discloses an annotate vapour boiler evaporation zone, utilize boiler evaporation zone to produce high dryness fraction steam, improve steam dryness fraction and steam quality, realize the high-efficient exploitation of viscous crude.

Claims (2)

1. An evaporation section of a steam injection boiler is characterized by comprising a vertical-structure pipe box frame, an elbow box connected with the pipe box frame, an evaporation pipe bundle arranged in the pipe box frame, a lower interface connected with a transition section, an upper interface connected with a convection section, an evaporation section pipe inlet connected with a radiation section pipe outlet, an evaporation section pipe outlet connected with a steam injection pipeline,

the tube box frame comprises a side window frame and a tube plate, and an insulating layer laid on the inner surfaces of the side window frame and the tube plate, the evaporation tube bundle is fixed by the tube plate,

the evaporation tube bundles are arranged in a full-light tube manner with a horizontal snake-shaped structure, and are connected by elbows.

2. The steam injection boiler evaporation section according to claim 1, wherein the evaporator bundle is a combination of light pipes and finned tubes, the light pipes being located below the evaporation section, the finned tubes being located above the light pipes.

Images