Wet-back boiler with inclined combustion chamber barrel structure

Abstract

The utility model relates to the technical field of boilers, in particular to a wet-back boiler with an inclined combustion chamber barrel structure, which comprises a boiler barrel and a combustion chamber arranged in the boiler barrel, the inner bottom of the combustion chamber is obliquely arranged, and an inlet of the combustion chamber is arranged outside the boiler barrel; in the using process, due to the fact that the inner bottom of the combustion chamber is inclined by 5 degrees relative to the horizontal direction, steam bubbles can be prevented from being gathered around the bottom of the combustion chamber barrel, and adverse factors such as noise are prevented from being generated. On the waste gas side, high-temperature waste gas carrying heat enters the gas channel from the waste gas inlet smoke box and makes contact with the outer wall of the rising pipe bundle; heat is transmitted to circulating water in the rising tube bundle in a heat conduction and convection mode, waste gas cooling is completed, the cooled waste gas and steam are mixed, fed into the waste gas upper smoke box through the steam-water separation part and finally discharged, when discharged, the steam is blocked by the steam-water separation part, can be condensed again and falls back into the boiler barrel, and then the steam humidity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a wet back boiler with an inclined combustion chamber cylinder structure. Background Art

[0002] For wet back boilers, the working process is that fuel oil or gas is sent into the combustion chamber of the boiler through the burner. After full combustion, a large amount of heat energy is released to heat the water in the furnace. The inclined structure design of the combustion chamber cylinder can prevent bubbles from gathering around the furnace bottom plate and causing explosions and noise. The high-temperature flue gas generated during combustion completes radiation heat exchange and enters the exhaust gas side, further completing flue gas cooling and waste heat recovery.

[0003] For example, the Chinese patent application number CN201220073207.8 discloses a wet back fuel oil exhaust gas combined boiler, the structure of which includes: a boiler drum, an exhaust gas inlet smoke box is arranged at the bottom of the boiler drum, the upper end of the exhaust gas inlet smoke box is connected to the bottom of a plurality of furnace tubes, the top of the plurality of furnace tubes is connected to the upper smoke box, the upper smoke box is provided with an exhaust gas outlet, a fuel oil furnace is also arranged in the boiler drum, the top of the fuel oil furnace is connected to the bottom of the chimney, the chimney is provided with a plurality of horizontal water pipes connected to the inside of the boiler drum, the bottom of the furnace of the fuel oil furnace is arranged in the boiler drum, and the utility model greatly increases the radiation heating surface on the fuel oil side. However, in actual use, during the cooling process of the exhaust gas side flue gas, the steam humidity is relatively high, that is, the steam brought out will also carry more water, which will affect the water circulation. If the water circulation is poor, it may cause steam-water stratification or form a stagnant area, causing local overheating in the boiler. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a wet back boiler with an inclined combustion chamber cylinder structure to solve the technical problem in the prior art that during the flue gas cooling process on the exhaust gas side, the steam humidity is relatively high, that is, the steam brought out also carries a lot of water, which affects the water circulation.

[0005] Based on the above purpose, the utility model provides a wet back boiler with an inclined combustion chamber barrel structure, comprising a boiler drum and a combustion chamber arranged in the boiler drum, the inner bottom of the combustion chamber is inclined, and the inlet of the combustion chamber is arranged outside the boiler drum;

[0006] A number of furnace tubes arranged on the combustion chamber;

[0007] An exhaust gas inlet smoke box provided at the bottom of the boiler drum, an exhaust gas upper smoke box provided at the upper part of the boiler drum, and a plurality of air passages connecting the exhaust gas inlet smoke box and the exhaust gas upper smoke box;

[0008] a rising pipe bundle disposed between the airways;

[0009] The boiler also includes:

[0010] A steam-water separation portion is arranged between the exhaust gas inlet smoke box and the airway, and the steam-water separation portion includes a mounting seat and a blocking member arranged between the mounting seats. The blocking member is used to slow down the flow speed of the exhaust gas after the exhaust gas in the airway enters the area between the mounting seats, so as to cool down the water vapor entrained in the exhaust gas and precipitate it.

[0011] Furthermore, the inner bottom of the combustion chamber is arranged at an angle of 5 degrees to the horizontal direction.

[0012] Furthermore, the blocking member is a corrugated plate, the interior of the corrugated plate is hollow, the surface of the corrugated plate is provided with a plurality of through holes communicating with the interior thereof, and at least one of the through holes is located on the lower surface of the corrugated plate.

[0013] Furthermore, the blocking member includes a plurality of louver boards, the louver boards are arranged at an angle, and the inclination angles of the louver boards are different, and gap bevels are provided between adjacent louver boards.

[0014] Furthermore, the plurality of furnace tubes are arranged vertically, and gaps are provided between adjacent furnace tubes.

[0015] The beneficial effects of the utility model are as follows: a wet back boiler with an inclined combustion chamber cylinder structure adopts the utility model. When in use, since the inner bottom of the combustion chamber is inclined at an angle of 5 degrees to the horizontal direction, bubbles can be avoided from gathering around the bottom of the combustion chamber cylinder, and adverse factors such as noise can be prevented. On the exhaust gas side, the high-temperature exhaust gas carrying heat enters the airway from the exhaust gas inlet smoke box, and contacts with the outer wall of the riser tube bundle. The heat is transferred to the circulating water in the riser tube bundle by heat conduction and convection, thereby completing the cooling of the exhaust gas. The cooled exhaust gas and steam are mixed and sent into the exhaust gas upper smoke box through the steam-water separation part and finally discharged. When discharged, the steam is blocked in the steam-water separation part, and can be condensed again and fall back into the boiler drum, thereby reducing the steam humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0019] Figure 3This is a schematic structural diagram of another embodiment of the utility model;

[0020] Figure 4 for Figure 3 A magnified view of the structure at point B.

[0021] The markings in the figure are:

[0022] 1. Boiler drum; 2. Boiler tube; 3. Exhaust gas inlet smoke box; 4. Exhaust gas upper smoke box; 5. Air duct; 6. Rising tube bundle; 7. Steam-water separation part; 8. Mounting seat; 9. Blocking piece; 10. Corrugated plate; 11. Shutter plate; 12. Gap bevel. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] The first embodiment of the utility model provides a wet back boiler with an inclined combustion chamber cylinder structure, such as Figure 1 , Figure 3 As shown, it includes a boiler drum 1 and a combustion chamber arranged in the boiler drum 1, the inner bottom of the combustion chamber is inclined, and the inlet of the combustion chamber is arranged outside the boiler drum 1;

[0026] A plurality of furnace tubes 2 arranged on the combustion chamber;

[0027] An exhaust gas inlet smoke box 3 is arranged at the bottom of the drum 1, an exhaust gas upper smoke box 4 is arranged at the upper part of the drum 1, and a plurality of air passages 5 connecting the exhaust gas inlet smoke box 3 and the exhaust gas upper smoke box 4;

[0028] A riser pipe bundle 6 disposed between the air passages 5;

[0029] The boiler also includes:

[0030] A steam-water separation portion 7 is provided between the exhaust gas inlet smoke box 3 and the airway 5. The steam-water separation portion 7 includes a mounting seat 8 and a blocking member 9 provided between the mounting seats 8. The blocking member 9 is used to slow down the flow speed of the exhaust gas after the exhaust gas in the airway 5 enters the area between the mounting seats 8, so as to cool down the water vapor entrained in the exhaust gas and precipitate it.

[0031] In this embodiment, the inner bottom of the combustion chamber is set at an angle of 5 degrees to the horizontal direction.

[0032] In this embodiment, when in use, the fuel oil or gas in the combustion chamber cylinder is fully burned, and the heat generated is transferred to the boiler water in the drum 1 through the cylinder wall and the bottom of the combustion chamber cylinder. The boiler water absorbs the radiant heat and starts to heat the water. In this process, since the bottom of the combustion chamber cylinder is inclined at an angle of 5 degrees to the horizontal direction, it can prevent bubbles from gathering around the bottom of the combustion chamber cylinder. During the operation of the boiler, it will slowly rise to the top of the boiler along the bottom of the inclined combustion chamber cylinder and be discharged from the upper steam-water space. The high-temperature flue gas generated in the combustion chamber cylinder is discharged to the top through a plurality of furnace tubes 2. In the process of the high-temperature flue gas being discharged upward, the heat is transferred to the boiler water in the drum 1 through the plurality of furnace tubes 2. The flue gas after the initial heat exchange enters the box at the top of the plurality of furnace tubes 2 for temporary storage, and further transfers the residual heat to the boiler water in the drum 1 through the box wall.

[0033] On the exhaust gas side, the high-temperature exhaust gas carrying heat enters the plurality of air ducts 5 from the exhaust gas inlet smoke box 3, and contacts the outer wall of the riser tube bundle 6, whereby the heat is transferred to the circulating water in the riser tube bundle 6 by heat conduction and convection. The circulating water is heated and partially vaporized into steam, and the cooled exhaust gas and steam are mixed and sent to the exhaust gas upper smoke box 4 through the steam-water separation section 7. When the exhaust gas in the air duct 5 enters the area between the mounting seats 8, the blocking member 9 can slow down the flow velocity of the exhaust gas, so that the water vapor entrained in the exhaust gas can be cooled and precipitated, and the exhaust gas is finally discharged.

[0034] In this embodiment, the blocking member 9 is a corrugated plate 10, the interior of the corrugated plate 10 is hollow, and the surface of the corrugated plate 10 is provided with a plurality of through holes connected to the interior thereof, and at least one through hole is located on the lower surface of the corrugated plate 10. When the cooled exhaust gas and steam are discharged from the through holes together, the steam is blocked by the plate surface of the corrugated plate 10, condenses again and falls back into the boiler drum 1, thereby reducing the steam humidity.

[0035] In addition, preferably, Figure 1 , Figure 3 As shown, a plurality of furnace tubes 2 are arranged vertically, and gaps are arranged between adjacent furnace tubes 2, which can promote the horizontal circulation and mixing of furnace water and reduce the risk of steam-water stratification.

[0036] In another embodiment, if Figure 3 , Figure 4As shown, the blocking member 9 includes a plurality of louver plates 11, which are tilted and have different tilt angles. A gap bevel 12 is provided between adjacent louver plates 11. When the cooled exhaust gas and steam are discharged from the gap bevel 12 together, the steam is blocked by the plate surface of the louver plates 11, condensed again and falls back into the boiler drum 1, thereby reducing the steam humidity.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0038] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A wet back boiler with an inclined combustion chamber cylinder structure, comprising: A boiler drum (1) and a combustion chamber arranged in the boiler drum (1), wherein the inner bottom of the combustion chamber is arranged obliquely, and the inlet of the combustion chamber is arranged outside the boiler drum (1); A plurality of furnace tubes (2) arranged on the combustion chamber; An exhaust gas inlet smoke box (3) provided at the bottom of the boiler drum (1), an exhaust gas upper smoke box (4) provided at the upper part of the boiler drum (1), and a plurality of air passages (5) connecting the exhaust gas inlet smoke box (3) and the exhaust gas upper smoke box (4); A rising pipe bundle (6) disposed between the air passages (5); Characterized in that the boiler also includes: A steam-water separation section (7) is provided between an exhaust gas inlet smoke box (3) and an airway (5), the steam-water separation section (7) comprising a mounting seat (8) and a blocking member (9) provided between the mounting seats (8), the blocking member (9) being used to slow down the flow rate of the exhaust gas after the exhaust gas in the airway (5) enters the area between the mounting seats (8), so as to cool the water vapor entrained in the exhaust gas and precipitate it.

2. A wet back boiler with an inclined combustion chamber cylinder structure according to claim 1, characterized in that: The inner bottom of the combustion chamber is arranged at an angle of 5 degrees to the horizontal direction.

3. A wet back boiler with an inclined combustion chamber cylinder structure according to claim 1 or 2, wherein the blocking member (9) is a corrugated plate (10), the interior of the corrugated plate (10) is hollow, and the surface of the corrugated plate (10) is provided with a plurality of through holes connected to the interior thereof, and at least one of the through holes is located on the lower surface of the corrugated plate (10).

4. A wetback boiler with an inclined combustion chamber cylinder structure according to claim 1 or 2, wherein the blocking member (9) comprises a plurality of louver plates (11), the louver plates (11) are inclined, and the inclination angles of the louver plates (11) are different, and gap bevels (12) are provided between adjacent louver plates (11).

5. A wet back boiler with an inclined combustion chamber cylinder structure according to claim 1, characterized in that: The plurality of furnace tubes (2) are arranged vertically, and adjacent furnace tubes (2) are arranged with gaps therebetween.

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