CN113834045A

CN113834045A - Through-flow steam generator

Info

Publication number: CN113834045A
Application number: CN202111161776.8A
Authority: CN
Inventors: 毛久富
Original assignee: Xinnengke Electric Co ltd
Current assignee: Xinnengke Electric Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-24

Abstract

The invention discloses a through-flow steam generator, comprising: a housing having at least a combustion chamber and a steam chamber partitioned therein; a can burner installed in the combustion chamber; the heat exchange tubes are arranged in the combustion chamber and distributed around the barrel type combustor, one end of each heat exchange tube is a water receiving end for water inlet, and the other end of each heat exchange tube is communicated to the steam chamber; the water separation sleeve is hollow and cylindrical and is arranged in the combustion chamber, the inner ring cylinder wall of the water separation sleeve surrounds each heat exchange tube, a water storage cavity is arranged between the inner ring cylinder wall and the outer ring cylinder wall of the water separation sleeve, a plurality of flue gas channels penetrate through the water storage cavity, one end of each flue gas channel is communicated with the combustion chamber, and the other end of each flue gas channel is communicated with the outside of the shell; wherein, the flue gas produced by the barrel type burner flows to the flue gas channel after passing through the gap between two adjacent heat exchange tubes; overall structure is compact, make full use of shell inner space, and the ingenious water proof cover that utilizes controls the flow of flue gas guarantees heat exchange efficiency to and accomplish the cooling before the flue gas discharges the external environment and handle.

Description

Through-flow steam generator

Technical Field

The invention relates to steam generating equipment, in particular to a through-flow steam generator.

Background

The existing steam generating equipment adopts a common structure that a combustor (fire grate type) is utilized for combustion, a heat exchanger exchanges heat above the combustor, and flue gas rises and is discharged after being cooled by a condenser. The condenser is independent of the combustion chamber, the structure generates certain limitation on the recovery of the heat of the flue gas, and the heat exchange efficiency of the flue gas and the heat exchanger is not high. For this reason, improvements to existing steam generation equipment are needed.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the related art. To this end, the invention proposes a through-flow steam generator.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a once-through steam generator according to an embodiment of the first aspect of the invention comprises:

a housing having at least a combustion chamber and a steam chamber partitioned therein;

a can combustor mounted within the combustion chamber;

the heat exchange tubes are distributed around the barrel type burner, one end of each heat exchange tube is a water receiving end for water inflow, and the other end of each heat exchange tube is communicated to the steam chamber;

the water separation sleeve is hollow and cylindrical and is arranged in the shell, the inner ring cylinder wall of the water separation sleeve surrounds each heat exchange tube, a water storage cavity is arranged between the inner ring cylinder wall and the outer ring cylinder wall of the water separation sleeve, a plurality of smoke channels penetrate through the water storage cavity, one end of each smoke channel is communicated with the combustion chamber, and the other end of each smoke channel is communicated with the outside of the shell;

and the flue gas generated by the barrel type combustor flows to the flue gas channel after passing through a gap between every two adjacent heat exchange tubes.

The through-flow steam generator provided by the embodiment of the invention has at least the following beneficial effects: overall structure is compact, make full use of shell inner space, and the ingenious water proof cover that utilizes controls the flow of flue gas guarantees heat exchange efficiency to and accomplish the cooling before the flue gas discharges the external environment and handle.

According to some embodiments of the invention, a flow baffle is arranged between adjacent heat exchange tubes, two smoke-passing channels are formed between the flow baffle and the outer walls of two corresponding heat exchange tubes, and the smoke-passing channels extend around the outer walls of the heat exchange tubes.

According to some embodiments of the invention, at least two circles of the heat exchange tubes are arranged around the can burner, and the heat exchange tubes of two adjacent circles are arranged in a radially staggered manner.

According to some embodiments of the invention, a spoiler is provided in the flue gas channel.

According to some embodiments of the invention, the water blocking sleeve is provided with a water inlet and a water outlet which are communicated with the water storage cavity.

According to some embodiments of the invention, a water inlet cavity is arranged in the outer shell, the water receiving end of each heat exchange tube is communicated with the water inlet cavity, and the water inlet cavity is provided with a water inlet pipe orifice.

According to some embodiments of the invention, the inner cylindrical wall of the water separating jacket close to the smoke exhaust end of the smoke channel extends to abut against the inner wall of the shell to separate the interior of the shell into a smoke exhaust cavity independent of the combustion chamber, the smoke exhaust end of the smoke channel is communicated with the smoke exhaust cavity, and the smoke exhaust cavity is communicated with the exterior of the shell.

According to some embodiments of the invention, a steam-water separating plate is disposed in the steam chamber, the steam-water separating plate is intercepted on a steam discharging path of the steam chamber, and a plurality of first air passing holes are opened on the steam-water separating plate.

According to some embodiments of the present invention, a steam-water separating member is disposed at the air outlet of the steam chamber, the steam-water separating member has a tubular structure with an open upper end and a closed lower end, the lower portion of the steam-water separating member extends into the steam chamber, and a plurality of second air holes are disposed on a pipe wall of the lower portion of the steam chamber.

According to some embodiments of the invention, the bottom of the combustion chamber is provided with an explosion vent.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an external structural view of the present invention;

FIG. 2 is a sectional view taken along line A of FIG. 1;

FIG. 3 is a schematic view of a water-resisting jacket structure;

FIG. 4 is a sectional view taken along line B of FIG. 3;

FIG. 5 is a top internal view of a once-through steam generator;

fig. 6 is a schematic view of two adjacent heat exchange tubes and corresponding baffle plates.

Reference numerals: a housing 100; a combustion chamber 110; a vapor chamber 120; an intake passage 130; an inlet chamber 140; a water inlet pipe port 141; a smoke discharge chamber 150; a blast gate 160; the can combustor 200; a heat exchange tube 300; a water receiving end 310; a baffle plate 320; a smoke passage 330; a water-blocking jacket 400; an inner ring barrel wall 401; an outer ring barrel wall 402; a water storage chamber 410; a flue gas channel 420; a spoiler 421; a water inlet 430; a water outlet 440; a water-vapor separation plate 500; a first air passing hole 510; a water-vapor separation member 600; and a second air passing hole 610.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The invention relates to a through-flow steam generator which mainly comprises a shell 100, a can type burner 200, a heat exchange tube 300 and a water-resisting sleeve 400.

As shown in fig. 1, the housing 100 may have a cylindrical shape, and divide the interior of the housing 100 into at least a combustion chamber 110 and a steam chamber 120. As shown in fig. 2, in the present embodiment, the steam chamber 120 and the combustion chamber 110 are distributed up and down in the housing 100. The can-type burner 200 is a gas type (such as natural gas) and is vertically installed in the combustion chamber 110, and the fire outlets of the can-type burner 200 are distributed along the height direction. An air inlet channel 130 which penetrates through the steam chamber 120 and is communicated with the barrel type burner 200 can be arranged at the top of the shell 100, the air inlet channel 130 is used for supplying air to the barrel type burner 200, an air supply device which is externally connected with the air inlet channel 130 blows air into the air inlet channel 130 through a fan in actual use, and the air in the combustion chamber 110 can be prevented from being exhausted out of the shell 100 through the air inlet channel 130. As shown in fig. 5, the position of the axis of the can-type combustor 200 is taken as the center, the plurality of heat exchange tubes 300 are circumferentially distributed around the can-type combustor 200, a gap is formed between two adjacent heat exchange tubes 300 in the same circle, each heat exchange tube 300 is installed along the direction of the can-type combustor 200, i.e., in the vertical direction, and the space between the heat exchange tube 300 and the can-type combustor 200 is the space where the combustion chamber 110 is located. The heat exchange pipe 300 has an upper end connected to the steam chamber 120 and a lower end serving as a water receiving end 310, and can pass through the bottom of the combustion chamber 110 to be connected to an external water source. The water blocking sleeve 400 is installed in the housing 100, and the water blocking sleeve 400 has a hollow cylindrical shape, and the water blocking sleeve 400 is opened at the upper and lower sides in this embodiment. As shown in fig. 3 and 4, the wall of the water stop sleeve 400 has a certain thickness to form an inner cylindrical wall 401 and an outer cylindrical wall 402, wherein the inner cylindrical wall 401 surrounds the heat insulation pipe 300. A water storage cavity 410 is formed between the inner ring cylinder wall 401 and the outer ring cylinder wall 402 in a hollow mode, a plurality of smoke channels 420 are arranged between the inner ring cylinder wall 401 and the outer ring cylinder wall 402, and the smoke channels 420 penetrate through the water storage cavity 410. In this embodiment, each flue gas channel 420 is distributed on the water-stop sleeve 400 around the central axis of the can-type combustor 200, and each flue gas channel 420 is vertically oriented and has openings at the upper and lower ends. The upper end of the flue gas channel 420 communicates with the combustion chamber 110, and the lower end communicates with the outside of the casing 100, i.e., with the outside environment.

In operation, the can burner 200 combusts gas to produce high temperature flue gas in the combustion chamber 110. An external water source may be pressurized by a water pump from the lower portion of the casing 100 to the lower end of each heat exchange pipe 300, and the water may rise after entering the heat exchange pipes 300. The water exchanges heat with the high-temperature flue gas in the combustion chamber 110 through the tube wall of the heat exchange tube 300, the water in the heat exchange tube 300 is heated to a steam state, and the steam is discharged into the steam chamber 120 from the upper end of the heat exchange tube 300 and is discharged through the steam chamber 120 for a user. According to the pressure difference in the burner, the high temperature flue gas generated from the can burner 200 flows toward the water separation sleeve 400, the flue gas flows outward through the gaps between the heat exchange tubes 300, and then the flue gas enters from the upper end of the flue gas channel 420, flows downward and is discharged to the external environment from the lower end of the flue gas channel 420. The water storage cavity 410 of the water-proof sleeve 400 is filled with cooling water, the flue gas is dispersed to flow and discharged in each flue gas channel 420, and the flue gas is effectively cooled through the water-proof sleeve 400. When the direction configuration according to above-mentioned embodiment, the flue gas can be up because of high temperature, and the flue gas needs to follow the upper end of flue gas passageway 420 and to remove to the lower extreme direction, then the flue gas need see through behind the heat exchange tube 200, from top to bottom be full of gradually and stretch downwards, can follow the discharge of flue gas passageway 420 lower extreme, can guarantee on the one hand that high temperature flue gas carries out abundant heat transfer with heat exchange tube 300 in combustion chamber 110, guarantees heat exchange efficiency, and on the other hand can guarantee that the flue gas fully cools down when flowing through flue gas passageway 420. In addition, the inner ring cylinder wall 401 of the water-stop sleeve 400 surrounds each heat exchange tube 300, a gap can exist between the inner ring cylinder wall 401 of the water-stop sleeve 400 and the heat exchange tubes 300, and after smoke passes through the gap between the heat exchange tubes 300, the smoke can climb to the air inlet end of the smoke channel 420 along the inner ring cylinder wall 401 of the water-stop sleeve 400, so that the smoke can be cooled in the process. Overall structure is compact, make full use of shell 100 inner space, and the ingenious flow that utilizes water-proof cover 400 to control the flue gas guarantees heat exchange efficiency to and accomplish the cooling before the flue gas discharges the external environment and handle.

As shown in fig. 5, a flow baffle 320 is disposed between two adjacent heat exchange tubes 300, in this example, the flow baffle 320 may have a T shape as shown in fig. 6, a middle protrusion of the flow baffle 320 is located at a gap between two heat exchange tubes 300, and the flow baffle 320 may be located between the heat exchange tubes 300 and an inner cylindrical wall 401 of the water stop jacket 400. The gaps between the flow blocking plate 320 and the two heat exchange tubes 300 form smoke passing channels 330, and the smoke passing channels 330 extend along the outer walls of the heat exchange tubes 300 in a top view. The combustion of the can burner 200 generates high temperature flue gas, and the flue gas is divided into two side flue gas flow channels 330 by the blocking effect of the flow blocking plate 320 when passing through the gap between the heat exchange tubes 300. The flue gas flows through the flue gas channel 330, which is equivalent to flowing around the outer wall of the heat exchange tube 300, so that the path of the flue gas flowing around the outer wall of the heat exchange tube 300 is increased, and the heat exchange effect is effectively improved. In the present invention, the outer wall of the heat exchange tube 300 may be a smooth outer wall, or fins may be disposed on the outer wall to increase the heat exchange area.

Further, the heat exchange tube 300 surrounding the can combustor 200 may be provided with one turn, or may be provided with two or more turns. As shown in fig. 5, in the present embodiment, two circles of heat exchange tubes 300 are disposed around the can-type combustor 200, and the adjacent heat exchange tubes 300 of the inner and outer circles are radially arranged in a staggered manner, that is, one heat exchange tube 300 of the outer circle is located at a position corresponding to a gap between two adjacent heat exchange tubes 300 of the inner circle. When the flue gas flows towards the direction of the waterproof jacket 400, the flue gas flow path is increased by the staggered arrangement of the heat exchange tubes 300, and the heat exchange effect is further improved.

In some embodiments of the present invention, a spoiler 421 is disposed in the flue gas channel 420, and as shown in fig. 4, the spoiler 421 may be in a spiral strip shape and disposed along the axial direction of the flue gas channel 420. When the tobacco willow flows in the smoke channel 420, the flow speed and the path of smoke are increased by using the turbulence effect of the turbulence sheet 421, and the smoke cooling effect is improved.

The water in the water storage cavity 410 of the waterproof jacket 400 preferably uses flowing water, that is, a water inlet 430 and a water outlet 440 are arranged on the waterproof jacket 400. In this embodiment, the water inlet 430 is located at the lower part or bottom of the water-stop jacket 400, and the water outlet 440 is located at the upper part or top of the water-stop jacket 400. External cold water is supplied into the water storage cavity 410 through the water inlet 430 by the water pump, and the water spreads upward in the water storage cavity 410 and is discharged out of the housing 100 from the water outlet 440 to be recovered. In addition, after the water in the water storage cavity 410 cools the flue gas through the flue gas channel 420, the water in the water storage cavity 410 is heated, and the warm water discharged from the water storage cavity 410 can be directly supplied to the heat exchange tube 300 for use, that is, the water is preheated, and the heat energy is recycled.

An inlet chamber 140 is provided in the casing 100, and the water receiving end 310 of the heat exchanging pipe 300 is supplied with water by the inlet chamber 140. In this embodiment, the water inlet cavity 140 may be disposed at the bottom of the casing 100, and the lower end of the heat exchange tube 300 is a water receiving end 310, which is communicated with the water inlet cavity 140. An external water source supplies water into the inlet chamber 140 through a water pump. Wherein, the warm water discharged from the water storage chamber 410 can flow back to the water inlet chamber 140 for use. Specifically, the water outlet 440 of the water storage cavity 410 may be connected to the water inlet cavity 140 through a water pipe and a water pump to realize warm water recycling.

In some embodiments of the present invention, the water stop sleeve 400 is hollow and cylindrical and is vertically disposed, the lower end of the smoke channel 420 is a smoke exhaust end, and the inner cylindrical wall 401 of the water stop sleeve 400 extends downward to abut against the inner wall of the bottom of the housing 100, so as to separate the bottom of the combustion chamber 110. The outer ring inner wall of the water blocking sleeve 400 can abut against the inner side wall of the housing 100, so that the flue gas can only flow downward through the flue gas channel 420 from above the water blocking sleeve 400. The inner side of the inner ring cylinder wall 401 faces the combustion chamber 110, and the outer side forms the smoke exhaust cavity 150. The lower end of each smoke channel 420 is connected to the smoke discharging chamber 150, and the smoke discharging chamber 150 is connected to the outside of the casing 100. The cooled flue gas is collected in the smoke exhaust cavity 150 and then discharged.

In the above structure, the inner cylindrical wall 401 of the water blocking sleeve 400 surrounds the can burner 200 and the heat exchange tube 300, which is equivalent to the inner cylindrical wall 401 of the water blocking sleeve 400 being able to serve as an outer boundary of the combustion chamber 110, and the inner cylindrical wall 401 increases the cooling area of the flue gas, that is, the efficiency of absorbing heat energy by the water in the water storage cavity 410.

In this example, the steam chamber 120 is located above the combustion chamber 110, and the air outlet of the steam chamber 120 may be disposed at the top, and the steam flows upward to be discharged from the air outlet. A steam separation plate 500 is provided in the steam chamber 120, and the steam separation plate 500 is horizontally and horizontally disposed to be intercepted by the steam discharge path of the steam chamber 120. Wherein, the water-vapor separating plate 500 is provided with a plurality of first air passing holes 510. The steam touches the steam-water separation plate 500 in the upward flowing process, part of liquid in the steam is condensed on the steam-water separation plate 500, and the steam continues to rise through the first air passing holes 510 and is discharged, so that the steam-water separation in the steam is realized.

Further, a moisture separating member 600 is provided at the air outlet of the steam chamber 120. In this embodiment, the water-vapor separation member 600 may be tubular, and has an open upper end and a closed lower end. The moisture separating member 600 is inserted into the air outlet, and the lower portion of the moisture separating member 600 extends into the steam chamber 120. The wall of the water-vapor separation member 600 in the steam chamber 120 is provided with a plurality of second air passing holes 610. When the steam is discharged to the outside through the second air passing holes 610, the steam and water separating member 600 performs secondary steam and water separation on the steam.

A blast gate 160 is provided at the bottom of the combustion chamber 110. In the present embodiment, as shown in fig. 2, an opening is formed at the bottom of the casing 100 at a position corresponding to the combustion chamber 110, and a valve plate is disposed below the opening and connected to the casing 100 by a spring or a screw. In a normal state, the valve plate closes the opening by the elastic force of the spring. When the air pressure in the combustion chamber 110 is too high, the air pressure pushes the valve plate to move downwards, the opening is opened, and the combustion chamber 110 is decompressed through the opening, so that the explosion is prevented. The valve plate resets under the action of the spring after pressure relief.

In the description herein, references to the description of a particular embodiment or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A once-through steam generator, comprising:

a housing (100) having at least a combustion chamber (110) and a steam chamber (120) partitioned therein;

a can-combustor (200) mounted within the combustion chamber (110);

the heat exchange tubes (300) are distributed around the barrel type combustor (200), one end of each heat exchange tube (300) is a water receiving end (310) for water inlet, and the other end of each heat exchange tube is communicated to the steam chamber (120);

the water separating sleeve (400) is in a hollow cylinder shape and is installed in the shell (100), the inner ring cylinder wall (401) of the water separating sleeve (400) surrounds the heat exchange tubes (300), a water storage cavity (410) is arranged between the inner ring cylinder wall (401) and the outer ring cylinder wall (402) of the water separating sleeve (400), a plurality of flue gas channels (420) are arranged through the water storage cavity (410), one ends of the flue gas channels (420) are communicated with the combustion chamber (110), and the other ends of the flue gas channels are communicated with the outside of the shell (100);

wherein, the flue gas produced by the barrel type combustor (200) flows to the flue gas channel (420) after passing through the gap between two adjacent heat exchange tubes (300).

2. A once-through steam generator according to claim 1, characterized in that: be equipped with between adjacent heat exchange tube (300) and keep off flow board (320), keep off flow board (320) and its two that correspond form two between the outer wall of heat exchange tube (300) and cross cigarette runner (330), it extends to cross cigarette runner (330) around heat exchange tube (300) outer wall.

3. A once-through steam generator according to claim 1 or 2, characterized in that: at least two circles of the heat exchange tubes (300) are arranged around the barrel type combustor (200), and the heat exchange tubes (300) of the two adjacent circles are arranged in a staggered mode along the radial direction.

4. A once-through steam generator according to claim 1, characterized in that: a spoiler (421) is arranged in the smoke channel (420).

5. A once-through steam generator according to claim 1, characterized in that: the water insulation sleeve (400) is provided with a water inlet (430) and a water outlet (440) which are communicated with the water storage cavity (410).

6. The once-through steam generator of claim 1 or 5, wherein: a water inlet cavity (140) is arranged in the shell (100), a water receiving end (310) of each heat exchange tube (300) is communicated with the water inlet cavity (140), and a water inlet pipe orifice (141) is arranged in the water inlet cavity (140).

7. A once-through steam generator according to claim 1, characterized in that: the inner ring cylinder wall (401) of the water separating sleeve (400) close to the smoke exhaust end of the smoke channel (420) extends and abuts against the inner wall of the shell (100) so as to separate the interior of the shell (100) into a smoke exhaust cavity (150) independent of the combustion chamber (110), the smoke exhaust end of the smoke channel (420) is communicated with the smoke exhaust cavity (150), and the smoke exhaust cavity (150) is communicated with the exterior of the shell (100).

8. A once-through steam generator according to claim 1, characterized in that: a water-vapor separation plate (500) is arranged in the steam chamber (120), the water-vapor separation plate (500) is intercepted on a steam discharging path of the steam chamber (120), and a plurality of first air passing holes (510) are formed in the water-vapor separation plate (500).

9. A once-through steam generator according to claim 1 or 8, characterized in that: the steam chamber is characterized in that a steam-water separation component (600) is arranged at the air outlet of the steam chamber (120), the steam-water separation component (600) is of a tubular structure with an opening at the upper end and a closed lower end, the lower part of the steam-water separation component (600) extends into the steam chamber (120), and a plurality of second air passing holes (610) are formed in the pipe wall of the lower part of the steam chamber.

10. A once-through steam generator according to claim 1, characterized in that: an explosion-proof door (160) is arranged at the bottom of the combustion chamber (110).