Vertical stainless steel steam boiler

Abstract

The invention provides a vertical stainless steel steam boiler which comprises a combustion system and a steam generation system, and through the structural design of finned tube heating, a steam heating tube penetrating through a three-stage steam chamber, a condensation water return pipe and the like, the heat exchange area is increased, the water volume is reduced, the safety coefficient of the boiler is enhanced, and energy consumption is reduced. And the national energy-saving and environment-friendly policy is met.

Description

Technical Field

[0001] The invention relates to the technical field of heating equipment, in particular to a vertical stainless steel steam boiler. Background Art

[0002] Steam generating equipment, especially steam boilers, as a special pressure-bearing equipment, water volume is an important parameter affecting boiler indicators. Boilers with small water volume have low safety level requirements for production, installation and use. According to TSG 11-2020 "Technical Specifications for Safety of Special Equipment": For boilers below 30 liters, there is no need to register for use, no regular inspections are required, and boiler operators do not need to obtain a "Special Equipment Operator Certificate". In order to reduce the cost of production, installation, and use, and improve the safety of boilers, while ensuring the normal use of boilers, minimizing water volume is the goal of boiler design and manufacturing. Reducing water volume will inevitably reduce the volume of the steam chamber, but too low a steam chamber volume will affect the dryness of water vapor and cannot meet the requirements of users with higher demands. Although some manufacturers use the addition of a water vapor separator to achieve the purpose of increasing the dryness of water vapor, it will increase the cost of equipment. At the same time, because the water separated by the water vapor separator will take away a lot of heat, it will also cause a lot of energy waste, which is not in line with the country's energy-saving and environmental protection policies. Summary of the invention

[0003] An object of the present invention, in combination with the problems raised in the technical background, is to provide a vertical stainless steel steam boiler that can still meet the requirements of steam dryness when the boiler water volume is low.

[0004] According to one purpose of the present invention, the present invention provides a vertical stainless steel steam boiler, which comprises a combustion system consisting of a combustion rod, a furnace, a steam heating pipe, a smoke collecting chamber, a smoke outlet, and a smoke exhaust port, and a steam generating system consisting of a water inlet, a lower water cavity, a finned tube, a primary steam chamber, a secondary steam chamber, a tertiary steam chamber, a condensation return pipe, and a steam outlet, wherein the combustion rod is located at the center of the furnace, the lower water cavity is located at the lower part of the furnace, the primary steam chamber, the secondary steam chamber, the tertiary steam chamber, and the smoke collecting chamber are located at the upper part of the furnace, the steam heating pipe is located in the tertiary steam chamber, the smoke exhaust port is located at the upper side of the boiler, the water inlet is located at the lower side of the boiler and is connected to the lower water cavity, and the steam outlet is located at the top of the boiler and is connected to the tertiary steam chamber.

[0005] Furthermore, the finned tubes are evenly distributed with the boiler axis as the center line, and can form one or more circles, and connect the lower water cavity and the first-level steam chamber.

[0006] Furthermore, the third-stage steam chamber is located at the top of the furnace.

[0007] Furthermore, the steam heating pipes are located in the three-stage steam chamber and are evenly arranged.

[0008] Furthermore, the condensation return pipe is located on the side of the boiler, connecting the third-stage steam chamber and the lower water chamber.

[0009] Furthermore, the primary steam chamber and the secondary steam chamber are connected in series via uniformly distributed steam holes.

[0010] Furthermore, the smoke collecting chamber is located at the upper part of the third-stage steam chamber and is connected to the furnace through the smoke outlet.

[0011] The technical solution of the present invention provides a vertical stainless steel steam boiler, in which a three-stage steam chamber is arranged on the top of the furnace, and a steam heating pipe is additionally arranged inside, so that the steam in the three-stage steam chamber can be heated for a second time. At the same time, the liquid water separated in the three-stage steam chamber flows back to the lower water cavity through the condensation return pipe for a second heating cycle. The present invention greatly reduces the water content of the steam without increasing the volume of the steam chamber, reduces the water volume of the boiler, improves the utilization rate of the boiler heat, improves the safety of the boiler, and reduces the manufacturing, installation and use costs of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 AA section view;

[0015] In the figure: 1. Steam outlet; 2. Smoke exhaust port; 3. Furnace; 4. Finned tube; 5. Combustion rod; 6. Lower water chamber; 7. Water inlet; 8. Premixed gas; 9. Condensation return pipe; 10. Flue gas; 11. Water vapor; 12. Primary steam chamber; 13. Steam through hole; 14. Secondary steam chamber; 15. Steam heating tube; 16. Flue gas outlet; 17. Third-stage steam chamber 18. Flue gas collecting chamber. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "center", "up", "down", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In addition, in the description of the present invention, "multiple" means two or more than two, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Example 1

[0020] like Figure 1 As shown, a vertical stainless steel steam boiler includes a combustion system consisting of a combustion rod 5, a furnace 3, a steam heating tube 15, a smoke collecting chamber 18, a smoke outlet 16, and a smoke exhaust port 2, and a steam generating system consisting of a water inlet 7, a lower water cavity 6, a fin tube 4, a primary steam chamber 12, a secondary steam chamber 14, a tertiary steam chamber 17, a condensation return pipe 9, and a steam outlet 1. The combustion rod 5 is located at the center of the furnace 3, the lower water cavity 6 is located at the lower part of the furnace 3, the primary steam chamber 12, the secondary steam chamber 14, the tertiary steam chamber 17, and the smoke collecting chamber 18 are located at the upper part of the furnace, the steam heating tube 15 is located in the tertiary steam chamber 17, connecting the furnace 3 and the smoke collecting chamber 18, the smoke exhaust port 2 is located on the upper side of the boiler, the water inlet 7 is located on the lower side of the boiler and connected to the lower water cavity 6, the steam outlet 1 is located at the top of the boiler and connected to the tertiary steam chamber 17, and the condensation return pipe 9 is located on the side of the boiler.

[0021] When the present invention works normally, as a combustion system, the premixed gas 8 composed of natural gas and air enters the combustion rod 5 at the bottom of the boiler, ignites and burns on the surface of the combustion rod 5, and the heat generated is transferred to the finned tube 4. Then, the high-temperature flue gas 10 passes through the finned tube 4 and flows upward along the outer wall 19 of the boiler. When flowing through the primary steam chamber 12 and the secondary steam chamber 14, the water vapor 11 in the steam chamber is further heated, thereby reducing the water content of the water vapor 11. The flue gas 10 that has not passed through the finned tube 4 flows toward the upper part of the furnace, and when passing through the steam heating tube 15, the heat carried is transferred to the water vapor 11 in the tertiary steam chamber 17, thereby further reducing the water content of the water vapor 11. At this time, the flue gas 10 is gathered in the flue gas collecting chamber 18, and finally passes through the flue gas outlet 16 and merges with the flue gas 10 flowing upward along the outer wall 19 of the boiler, and then is discharged from the boiler through the smoke exhaust port 2, where the solid arrow shows the flow direction of the flue gas 10.

[0022] At the same time, cold water 20 of a certain pressure flows into the lower water chamber 6 through the water inlet 7 in the steam generation system. Due to the water pressure, the cold water 20 flows upward along the fin tube 4. At this time, a large amount of heat generated by the premixed gas 8 burning in the combustion rod 5 is fully absorbed by the cold water 20. As the cold water 20 flows upward, the temperature of the cold water 20 gradually rises until it boils. The generated steam-water mixture flows into the primary steam chamber 12. Since the primary steam chamber 12 is provided with a steam through hole 13, the water flow flowing into the primary steam chamber 12 will be blocked and flow back into the fin tube 4. The water vapor 11 will flow into the secondary steam chamber 14 along the steam through hole 13. Because the outsides of the primary steam chamber 12 and the secondary steam chamber 14 are high-temperature flue gas, the water vapor 11 in the steam chamber further absorbs heat, greatly reducing the water content of the water vapor 11, and the dryness of the water vapor 11 is improved. After the water vapor 11 flows out of the secondary steam chamber 14, it immediately enters the tertiary steam chamber 17. Because a large number of steam heating pipes 15 pass through the tertiary steam chamber 17, the high-temperature flue gas in the heating pipe will further heat the water vapor 11 flowing into the tertiary steam chamber 17, further reducing the water content of the water vapor in the tertiary steam chamber 17, and finally flows out of the boiler through the steam outlet 1. Long-term operation of the first, second, and third steam chambers will more or less separate some liquid water, part of which will be re-evaporated into water vapor as the flue gas 10 is heated, and the other part will enter the reflux channel, where the liquid water separated by the third steam chamber 17 will flow back to the lower water chamber through the condensation return pipe 9, the liquid water separated by the second steam chamber 14 will flow back to the first steam chamber 12 through the steam through hole 13, and the liquid water separated by the first steam chamber 12 will flow back to the fin tube 4, and the reflux water will enter the next heating cycle. The dotted arrows show the flow direction of the process of cold water 7 turning into water vapor 11.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical stainless steel steam boiler, characterized in that: The invention comprises a combustion system consisting of a combustion rod, a furnace, a steam heating tube, a smoke collecting chamber, a smoke outlet and a smoke exhaust port, and a steam generating system consisting of a water inlet, a lower water cavity, a fin tube, a primary steam chamber, a secondary steam chamber, a tertiary steam chamber, a condensation return pipe and a steam outlet, wherein the combustion rod is located at the center of the furnace, the lower water cavity is located at the lower part of the furnace, the primary steam chamber, the secondary steam chamber, the tertiary steam chamber and the smoke collecting chamber are located at the upper part of the furnace, the steam heating tube is located in the tertiary steam chamber, the smoke exhaust port is located at the upper side of the boiler, the water inlet is located at the lower side of the boiler and is connected to the lower water cavity, and the steam outlet is located at the top of the boiler and is connected to the tertiary steam chamber.

2. A vertical stainless steel steam boiler according to claim 1, characterized in that: The finned tubes are evenly distributed with the boiler axis as the center line, and can be arranged in one circle or multiple circles.

3. A vertical stainless steel steam boiler according to claim 1, characterized in that: The steam heating pipes are located in the three-stage steam chamber and are evenly arranged.

4. A vertical stainless steel steam boiler according to claim 1, characterized in that: The primary steam chamber and the secondary steam chamber are connected in series via uniformly distributed steam through holes.

5. A vertical stainless steel steam boiler according to claim 1, characterized in that: The smoke collecting chamber is located at the upper part of the third-stage steam chamber and is connected to the furnace through the smoke outlet.

6. A vertical stainless steel steam boiler according to claim 1, characterized in that: The condensation return pipe is located on the side of the boiler, connecting the third-stage steam chamber and the lower water chamber.

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