WO2018184268A1

WO2018184268A1 - Efficient boiler using flue gas to agitate and swirl water to heat and gasify lng

Info

Publication number: WO2018184268A1
Application number: PCT/CN2017/082740
Authority: WO
Inventors: 严平; 曹伟武; 张歆悦
Original assignee: 上海工程技术大学
Priority date: 2017-04-06
Filing date: 2017-05-02
Publication date: 2018-10-11
Also published as: CN106989270A; CN106989270B

Abstract

An efficient boiler using flue gas to agitate and swirl water to heat and gasify LNG. A combustion chamber is mounted at the top of a vertical closed cylindrical housing (2). A lower end of an outer cylinder is a tapered nozzle (3). A lower portion of the housing is provided with a pool for storing water. A gas flow-enabled water swirling element (1) in the shape of an inverted umbrella is partially submerged under the water surface of the pool. A joint between an inner curve (1c) and a horizontal straight line (1b) is provided with n water adding holes (1e). Inside the housing (2), an annular overflow spacer (4) is disposed at a distance e from an inner wall of the housing (2). The gas flow-enabled water swirling element (1) comprises: a surface A, wherein the surface is a circular arc surface, like the surface of a funnel; and a surface B, centered around the vertical center line of the gas flow-enabled water swirling element (1), and equally divided into a plurality of cones in a circumferential direction, wherein each cone comprises an arc-shaped concave conical surface protruding towards an outer surface. The device for heating and gasifying LNG is improved, it has been proved both theoretically and in practice that the gasification effect thereof is obviously improved, and for gasification of the same amount of LNG, power consumption is greatly reduced.

Description

High efficiency flue gas impact rotary water type LNG heating gasifier

Technical field

The invention relates to an LNG heating gasification device, in particular to an improved device for a flue gas impact rotary water type LNG heating gasification furnace.

Background technique

LNG (Liquefied Natural Gas), the abbreviation of LNG. LNG is a liquid obtained by cooling natural gas which is in a gaseous state at normal temperature and normal pressure to -162 ° C to be condensed. Natural gas liquefaction can greatly save storage and transportation space and cost. At normal pressure, LNG can be gasified into 625 cubic meters of natural gas per cubic meter. Therefore, LNG is often used for trade transportation or strategic reserve. However, when using LNG, it is still necessary to heat and gasify it into natural gas at the pressure temperature required for the process, so that it can be used in engineering. Therefore, in the LNG gas supply system, there must be heated gasification equipment, and the main equipment is LNG heating. Gasification unit. At present, a variety of heating gasification devices have been put into practical use, and the inventors also proposed "a flue gas impact rotary water type LNG heating gasification device" patent number 201010113494.6 and improved structure in 2010, however, the gasification efficiency is always improved. It is the goal that the field is constantly pursuing. The LNG heating gasifier requires a large amount of gas, and has great economic and social benefits even if the fine gasification efficiency is improved.

Summary of the invention

It is an object of the present invention to provide an improved structure of a flue gas impinging rotary water-type LNG heating gasification apparatus to further improve gas efficiency.

The object of the invention is achieved by the following structure:

A high efficiency flue gas impact rotary water type LNG heating gasification furnace,

The combustion chamber is installed on the top of the vertical sealed cylindrical outer casing. The combustion chamber is composed of an inner cylinder and an outer cylinder. The lower end of the outer cylinder is a conical nozzle; the lower part of the outer casing is a pool for storing water, and the water surface of the pool is submerged as an inverted umbrella. a stream of water,

It is characterized by:

The center of the airflow swirling water is an upwardly protruding apex, and the apex is downwardly and circumferentially extended to have an inverted horn shape. The vertical section of the airflow swirling water is two symmetrical busbars, and the shape of the busbar is composed of three sections: An inner curve obliquely downward from the upper center, the second segment is a horizontal straight line, and the third segment is an outer curve that is outwardly and upwardly tilted.

In the intersection of the inner curve and the second straight line, a plurality of water filling holes are opened in one week of the swirling water surface of the air flow;

Inside the outer casing, a floating overflow partition is arranged at a distance from the inner wall e of the outer casing, and the inside of the overflow partition is a water pool, and an overflow tank is formed between the overflow partition and the outer casing, and is connected by the pipeline.

The height of the overflow spacer is equal to or higher than the level of the edge of the inverted horn of the airflow swirler;

The surface of the cyclone water jet is chosen by two structures:

A surface: the surface is a circular arc surface, like the surface of the horn;

B surface: centered on the vertical center line of the swirling water of the airflow, and is equally divided into a plurality of tapers in the circumferential direction, each taper forming a concave arcuate concave surface of the outward surface protrusion.

By adopting the technical scheme, the segments of the three sections of the airflow swirling water busbar are clearly shaped to play different roles, and comprehensively complete the effects of impact, reflection and gasification.

The water replenishing hole is an important component, and its position on the cyclone is sensitive, and strict definition will improve the gasification efficiency, and a sufficient amount of water replenishment can be obtained by the limitation of the present invention.

The water level in the pool also affects the impact water volume and gasification effect of the present invention. The overflow spacer of the present invention can accurately provide the height of the airflow swirling water into the pool, which is simple and accurate.

Compared with the A surface of the cyclone, the present invention further provides a B surface, and the entire airflow hydrocyclone is divided into m tapers in the circumferential direction, and each taper forms an outward surface, that is, protrudes downward. The arc-shaped concave tapered surface, such a shape and structure, the high-temperature gas ejected from the conical nozzle of the combustion chamber not only produces an overall large reflection like the A surface, but also forms a small reflection for each concave conical surface unit. The large and small reflections overlap, and the gasification effect is greatly increased instantaneously, and the gasification effect and efficiency are more obvious.

The surface of B can be formed by integral stamping and drawing, and can be formed by one-time casting. Each concave tapered surface can be integrally formed and welded to each other. In short, the manufacturing method is many.

Further, the inner curve of the air flow cyclone is a curved curve of a parabola, an arc or a hyperbola.

Further, the diameter of the water filling hole is 4-10 mm.

Further, the overflow spacer is spaced apart from the inner wall e of the outer casing by a distance of 5-12 mm. The height of the overflow spacer is equal to or higher than the height of the inverted horn edge of the airflow swirler by 2-4 mm.

Further, the upper edge of the overflow spacer is sleeved to adjust the height adjustment ring up and down.

Further, the B surface is equally divided into 12 to 32 tapers in the circumferential direction.

Further, each of the B surfaces is tapered to form a concave tapered surface having an arcuate degree of 90-180 degrees.

The features and advantages of the patent of the invention are:

The invention adds a limitation on the clear shape of the three sections of the airflow swirling sub-bus on the original basis; increases the limitation of the radial position of the n water-filling holes in the airflow sub-surface; and increases the setting of the automatic adjustment control pool water surface The high-flow overflow spacer element provides a B-surface structure and shape formed by dividing the airflow hydrocyclone into m cones in the circumferential direction, and each cone forms a circular concave surface of the outward surface protrusion. The vertical center line of the airflow hydrocyclone is the center of the circle, and is divided into m cones in the circumferential direction. Each cone forms a concave arc-shaped concave surface protruding from the outer surface. It is theoretically and practically proved that the smoke impact cyclone The gasification effect of the water-based LNG heating gasification unit is obviously improved, and the same amount of LNG can be greatly reduced in gasification.

DRAWINGS

1 is a schematic view showing the overall structure of an embodiment of a high-efficiency flue gas impact rotary water-type LNG heating gasification furnace according to the present invention;

2 is a schematic view showing the overall structure of a flue gas impinging rotary water type LNG heating gasification device;

3 is a schematic structural view of a surface structure of a water jet water jet A according to an embodiment of the present invention, which identifies a position of a water filling hole;

4 is a plan view showing a surface structure of a water jet water jet A according to an embodiment of the present invention;

Figure 5 is a schematic view showing the structure of the bus bar of the air flow swirling water of the present invention comprising three segments;

6 is a schematic view showing the surface structure of the airflow water jet B according to another embodiment of the present invention, horizontal observation and plan view, and the corresponding structural relationship, and the drawings are incomplete, but the corresponding relationship can be displayed;

Figure 7 is a perspective view showing the structure of the surface of the air-jet water jet B according to an embodiment of the present invention, and only one of the circular concave-conical surface elements is drawn;

Figure 8 is a plan view showing the surface structure of the air flow water jet B according to an embodiment of the present invention, showing a circle The average weekly is divided into 12 cones;

9 is a schematic structural view of an adjusting ring of an upper edge of an overflow spacer that can move up and down to adjust the height according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an assembly process of a high efficiency flue gas impact rotary water LNG heating gasification furnace adopting the technical scheme of the present invention.

In the picture:

1 is the airflow swirling water, 1a is the outer curve, 1b is the horizontal straight line, 1c is the inner curve, 1e is the water filling hole, 1f is the apex, 2 is the jacket layer, 3 is the conical nozzle, 4 is the overflow spacer, 4a is an adjustment ring.

detailed description

The structure of the present invention will be described in further detail below with reference to the accompanying drawings.

A high-efficiency flue gas impact rotary water-type LNG heating gasification furnace is installed on the top of the vertical sealed cylindrical outer casing 2, the combustion chamber is composed of an inner cylinder and an outer cylinder, and the lower end of the outer cylinder is a conical nozzle 3 The lower part of the outer casing is a pool of water, and the water surface of the pool is partially submerged with an inverted umbrella-like airflow swirling water.

The center of the airflow hydrocyclone 1 is an upwardly protruding cusp 1f, which is downwardly and circumferentially extended by the apex 1f in the shape of an inverted horn. The vertical section along the airflow vortex 1 is two symmetrical busbars, and the shape of the busbar is three Segment composition: the first segment is inclined from the upper center to the inner curve 1c, the second segment is the horizontal straight line 1b, and the third segment is the outer curve 1a which is outwardly and upwardly tilted,

In the intersection of the inner curve 1c and the second segment of the horizontal straight line 1b, n water-retaining holes 1e are opened in one side of the surface of the air-flowing water;

Inside the outer casing 2, a loop overflow spacer 4 is disposed at a distance from the inner wall e of the outer casing 2. The inside of the overflow partition 4 is a pool, and an overflow tank is formed between the overflow partition 4 and the outer casing 2, and is connected by the pipeline. ,

The height of the overflow spacer 4 is equal to or higher than the height of the inverted horn edge of the air flow swirler 1;

The surface of the cyclone 1 is selected from two structures:

A surface: the surface is a circular arc surface, like the surface of the horn; the surface of the A surface is simple relative to the B surface, and is easy to manufacture.

B surface: centered on the vertical center line of the swirling water 1 of the airflow, and is equally divided into several in the circumferential direction Each of the tapers forms a circular concave surface of the arc that protrudes toward the outer surface. The structure is complex with respect to the A surface, but the gasification efficiency is higher, which can meet the needs of the pursuit of efficiency.

The inner curve 1c of the airflow hydrocyclone 1 is a curved curve of a parabola, an arc or a hyperbola, which serves as a better guiding effect and improves efficiency.

The water filling hole 1e has a diameter of 4 to 10 mm. This range is suitable for common use. The pore size is too large. The high pressure gas in the spout is directly flushed into the pool. The reflection effect is not good, the pore diameter is too small, and the water replenishment is insufficient, which affects the effect of spraying and gasification.

The overflow spacer 4 has a distance of 5-12 mm from the inner wall e of the outer casing 2. The height of the overflow spacer 4 is equal to or higher than the level of the inverted horn of the airflow swirler 1 by 2-4 mm. In this range, both the overflow effect and the jet gasification work can be better satisfied.

The upper edge of the overflow spacer 4 is sleeved to adjust the height of the adjusting ring 4a up and down. A round hole can be selected between the two, and another long hole in the up and down direction can be selected and fixed by bolts.

The B surface is equally divided into 12 to 32 tapers in the circumferential direction. Depending on the size of the boiler, the number of suitable tapered monomers can be selected. It is neither too complicated in structure nor good in gasification effect. Generally, 12 is more suitable and suitable.

Each of the B surfaces is formed into a concave tapered surface having a circular arc degree of 0-180 degrees. The circular arc degree is a concave tapered surface protruding to the outer side surface, that is, a circular arc degree perpendicular to the left and right side busbars, and the circular arc opening is upward and concave, according to the diameter of the gasifier, Height and jet pressure, choose the right degree. If the arc degree is too small, the effect is not obvious. When the arc is 0, the surface is A surface, the arc is too large, and it can not be formed normally when it exceeds 180 degrees. It is generally suitable to take about 90 degrees after the test.

Claims

A high efficiency flue gas impact rotary water type LNG heating gasification furnace,

A combustion chamber is installed on the top of the vertical closed cylindrical casing (2). The combustion chamber is composed of an inner cylinder and an outer cylinder. The lower end of the outer cylinder is a conical nozzle (3); the lower part of the outer casing is a pool for storing water, and the pool is The surface of the water is submerged in an inverted umbrella-shaped airflow swirling water (1).

It is characterized by:

The center of the airflow hydrocyclone (1) is an upwardly protruding apex (1f), which is extended downward from the apex (1f) and has a shape of an inverted horn, and the vertical section of the water swirling water (1) is two symmetrical. The busbar, the shape of the busbar is composed of three segments: the first segment is inclined from the upper center to the inner curve (1c), the second segment is the horizontal straight line (1b), and the third segment is the outer curve that is outwardly and upwardly tilted. (1a),

In the intersection of the inner curve (1c) and the second segment of the horizontal straight line (1b), n water-filling holes (1e) are opened in the week of the air-jet water (1) surface;

Inside the outer casing (2), a loop overflow sleeve (4) is arranged at a distance from the inner wall e of the outer casing (2), the inner part of the overflow partition (4) is a pool, the overflow partition (4) and the outer casing (2) An overflow trough is formed between the pipes and is connected by the pipeline.

The height of the overflow partition (4) is equal to or higher than the height of the inverted horn edge of the air flow swirling water (1);

The surface of the cyclone (1) is selected from two structures:

A surface: the surface is a circular arc surface, like the surface of the horn;

B surface: centered on the vertical center line of the swirling water (1) of the air stream, and is equally divided into a plurality of tapers in the circumferential direction, each taper forming a circular concave surface of the arc protruding toward the outer surface.
The high efficiency flue gas impact rotary water type LNG heating gasification furnace according to claim 1, characterized in that the inner curve (1c) of the air flow swirling water (1) is a curved curve of a parabola, an arc or a hyperbola. .
The high efficiency flue gas impact rotary water type LNG heating gasification furnace according to claim 1, wherein the water replenishing hole (1e) has a diameter of 4 to 10 mm.
The high efficiency flue gas impact rotary water type LNG heating gasification furnace according to claim 1, characterized in that the distance between the overflow partition (4) and the inner wall of the outer casing (2) is 5-12 mm. The height of the overflow spacer (4) is equal to or higher than the height of the inverted horn edge of the airflow swirling water (1) by 2-4 mm.
The high efficiency flue gas impact rotary water type LNG heating gasification furnace according to claim 1, characterized in that An adjusting ring (4a) for adjusting the height can be placed on the upper edge of the overflow spacer (4).
The high efficiency flue gas impact rotary water-type LNG heating gasification furnace according to claim 1, wherein said B surface is equally divided into 12 to 32 tapers in the circumferential direction.
The high-efficiency flue gas impact rotary water-type LNG heating gasification furnace according to claim 1, wherein each of the B surfaces is formed into a concave tapered surface having a circular arc degree of 0-180 degrees.