Steam waste heat utilization device

Abstract

The invention discloses a steam waste heat utilization device which comprises a recycling pipe, an air heating pipe and a condensation heat exchange box. The recycling pipe is provided with a steam receiving section, a first spiral section, a second spiral section and a condensate water recycling section; the air heating pipe is provided with an air inlet section, a spiral heating section and a boiler air supply section; a spiral heating cavity which covers the outer surface of the first spiral section and allows air to pass through is formed between the spiral heating section and the first spiral section; a first fan blade is rotationally installed in the steam receiving section, a second fan blade is rotationally installed in the boiler air supply section, and a rotating shaft of the second fan blade and a rotating shaft of the first fan blade are coaxial and fixed to each other. Through the arrangement of the first fan blade and the second fan blade, kinetic energy of steam tail gas can be well utilized, air in the air heating pipe can flow from the air inlet section to the boiler air supply section, and during flowing, the air can be well heated by steam in the first spiral section when passing through the spiral heating cavity.

Description

Technical Field

[0001] This invention relates to the field of boilers, and more specifically to a steam waste heat utilization device. Background Technology

[0002] The principle of boiler power generation is to convert water into steam by burning fuel and releasing heat. The steam then drives the turbine blades to rotate, which in turn drives the generator to produce electricity. The steam exhaust gas after the work is completed enters the condenser to be cooled back into water and then returned to the boiler. Steam exhaust gas has a certain velocity and carries a lot of heat. Current technology that directly cools it through the condenser cannot make good use of the steam exhaust gas. Summary of the Invention

[0003] To address the above-mentioned problems, this invention proposes a steam waste heat utilization device.

[0004] The technical solution adopted in this invention is as follows: A steam waste heat recovery device includes a recovery pipe, an air heating pipe, and a condensation heat exchange box; The recycling pipe has a steam receiving section, a first spiral section, a second spiral section, and a condensate recovery section connected in sequence. The air heating pipe has an air inlet section, a spiral heating section and a boiler air supply section connected in sequence. The inner diameter of the spiral heating section is larger than the outer diameter of the first spiral section. The first spiral section is located inside the spiral heating section. A spiral heating cavity that allows air to pass through is formed between the spiral heating section and the first spiral section, covering the outer surface of the first spiral section. A first fan blade is rotatably installed in the steam receiving section, and a second fan blade is rotatably installed in the boiler gas supply section. The rotation axis of the second fan blade and the rotation axis of the first fan blade are coaxial and fixed to each other. The steam receiving section is used to receive steam exhaust gas from the boiler, and the boiler air supply section is used to supply air to the boiler combustion chamber; the condensate recovery section is used to connect to the boiler's water inlet pipe; the second spiral section is located in the condensation heat exchange box, and the condensation heat exchange box is used to condense the remaining steam in the second spiral section into water; the air inlet section is connected to the external atmosphere. When the steam waste heat utilization device is working, the steam exhaust gas enters the steam receiving section, which drives the first fan blade to rotate. The first fan blade drives the second fan blade to rotate synchronously. The rotation of the second fan blade causes the air in the air heating tube to flow into the boiler combustion chamber after passing through the air inlet section, the spiral heating section and the boiler air supply section in sequence.

[0005] One working process of the steam waste heat utilization device of this application: The steam receiving section receives steam tail gas, which passes through the steam receiving section, the first spiral section, the second spiral section and the condensate recovery section in sequence. The steam tail gas has a certain speed, which can drive the first fan blade of the steam receiving section to rotate. The first fan blade drives the second fan blade to rotate synchronously. The rotation of the second fan blade causes the air in the air heating tube to flow into the boiler combustion chamber after passing through the air inlet section, the spiral heating section and the boiler air supply section in sequence. When the air enters the spiral heating section (spiral heating chamber), it can be effectively heated by the first spiral section, so that the air entering the boiler combustion chamber has high thermal energy.

[0006] By setting up the first and second fan blades, this application can make good use of the kinetic energy of the steam exhaust gas, so that the air in the air heating tube can flow from the air inlet section to the boiler air supply section without the need for an additional power device. When the air flows, it can be well heated by the steam in the first spiral section when it passes through the spiral heating chamber. The air that finally flows into the boiler combustion chamber has high heat, which can help improve the boiler combustion efficiency.

[0007] In one embodiment of the present invention, the first spiral segment is located above the second spiral segment, the steam receiving segment is inclined, and the lower end of the steam receiving segment is connected to the upper end of the first spiral segment. The water formed inside the steam receiving section, the first spiral section, and the second spiral section can flow to the condensate recovery section under the action of gravity.

[0008] In this application, the steam exhaust gas flows from high to low, and the condensed water during the heat exchange process can automatically flow to the lowest condensate recovery section under the action of gravity.

[0009] In this application, because the first fan blade drives the second fan blade to rotate, the air inside the air heating pipe can flow from low to high.

[0010] In one embodiment of the present invention, the steam receiving section has a first mounting cavity, and the first fan blade is rotatably mounted on the first mounting cavity; The boiler gas supply section has a second mounting cavity, and the second fan blade is rotatably mounted on the second mounting cavity.

[0011] In one embodiment of the present invention, the first mounting cavity is disposed upward relative to the steam receiving section, and the second mounting cavity is disposed downward relative to the boiler gas supply section.

[0012] The first mounting chamber is set upward relative to the steam receiving section, that is, the first fan blade is offset, so that the steam exhaust gas can better drive the first fan blade to rotate after entering the steam receiving section; the second mounting chamber is set downward relative to the boiler air supply section, that is, the second fan blade is offset, so that when the second fan blade rotates, it can better drive the air in the air heating tube to circulate.

[0013] In one embodiment of the present invention, the end of the air inlet section has a flared structure.

[0014] In one embodiment of the present invention, the condensation heat exchange box is a water tank.

[0015] In one embodiment of the present invention, the condensation heat exchanger has an inlet pipe and an outlet pipe.

[0016] In one embodiment of the present invention, the water inlet pipe is located at the lower part of the condensation heat exchanger box, and the water outlet pipe is located at the upper part of the condensation heat exchanger box.

[0017] In one embodiment of the present invention, a circulation pump is installed on the water inlet pipe.

[0018] The beneficial effects of this invention are: by setting the first fan blade and the second fan blade, this application can make good use of the kinetic energy of the steam exhaust gas, so that the air in the air heating tube can flow from the air inlet section to the boiler air supply section without the need for an additional power device to drive it. Moreover, when the air flows, it can be well heated by the steam in the first spiral section when it passes through the spiral heating chamber. Finally, the air flowing into the boiler combustion chamber has a high heat, which can help improve the boiler combustion efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a steam waste heat recovery device; Figure 2 This is a schematic diagram of the steam waste heat recovery device from another angle; Figure 3 This is a top view of a steam waste heat recovery device; Figure 4 yes Figure 3 Sectional view of AA; Figure 5 yes Figure 3 BB section view; Figure 6 yes Figure 3 CC section view; Figure 7 This is a schematic diagram showing the steam receiving section and boiler gas supply section after being cut open. Figure 8 This is a partial schematic diagram of the steam receiving section.

[0020] The labels for the attached figures are as follows: 1. Recycling pipe; 11. Steam receiving section; 111. First mounting cavity; 12. First spiral section; 13. Second spiral section; 14. Condensate recovery section; 2. Air heating pipe; 21. Air inlet section; 211. Flared structure; 22. Spiral heating section; 221. Spiral heating cavity; 23. Boiler air supply section; 231. Second mounting cavity; 3. Condensation heat exchanger; 31. Water inlet pipe; 32. Water outlet pipe; 4. First fan blade; 5. Second fan blade. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-8 As shown, a steam waste heat utilization device includes a recovery pipe 1, an air heating pipe 2, and a condensation heat exchange box 3.

[0026] like Figure 1 , Figure 4 , Figure 6 and Figure 8 As shown, the recycling pipe 1 has a steam receiving section 11, a first spiral section 12, a second spiral section 13 and a condensate recovery section 14 connected in sequence. like Figure 1 and Figure 2 As shown, the air heating pipe 2 has an air inlet section 21, a spiral heating section 22, and a boiler air supply section 23 connected in sequence. like Figure 4 As shown, the inner diameter of the spiral heating section 22 is larger than the outer diameter of the first spiral section 12. The first spiral section 12 is located inside the spiral heating section 22. A spiral heating cavity 221, which covers the outer surface of the first spiral section 12 and allows air to pass through, is formed between the spiral heating section 22 and the first spiral section 12. like Figure 5 , Figure 6 and Figure 7 As shown, a first fan blade 4 is rotatably installed in the steam receiving section 11, and a second fan blade 5 is rotatably installed in the boiler gas supply section 23. The rotating shaft of the second fan blade 5 and the rotating shaft of the first fan blade 4 are coaxial and fixed to each other. The steam receiving section 11 is used to receive steam exhaust gas from the boiler, and the boiler air supply section 23 is used to supply air to the boiler combustion chamber; the condensate recovery section 14 is used to connect to the boiler water inlet pipe 31; the second spiral section 13 is located in the condensation heat exchange box 3, which is used to condense the remaining steam in the second spiral section 13 into water; the air inlet section 21 is connected to the outside atmosphere. When the steam waste heat utilization device is working, the steam tail gas enters the steam receiving section 11, which drives the first fan blade 4 to rotate. The first fan blade 4 drives the second fan blade 5 to rotate synchronously. The rotation of the second fan blade 5 causes the air in the air heating pipe 2 to flow into the boiler combustion chamber after passing through the air inlet section 21, the spiral heating section 22 and the boiler air supply section 23 in sequence.

[0027] One working process of the steam waste heat utilization device of this application: The steam receiving section 11 receives steam tail gas. The steam tail gas passes through the steam receiving section 11, the first spiral section 12, the second spiral section 13 and the condensate recovery section 14 in sequence. The steam tail gas has a certain speed, which can drive the first fan blade 4 of the steam receiving section 11 to rotate. The first fan blade 4 drives the second fan blade 5 to rotate synchronously. The rotation of the second fan blade 5 causes the air in the air heating pipe 2 to flow into the boiler combustion chamber after passing through the air inlet section 21, the spiral heating section 22 and the boiler air supply section 23 in sequence. When the air enters the spiral heating section 22 (spiral heating chamber 221), it can be effectively heated by the first spiral section 12, so that the air entering the boiler combustion chamber has high thermal energy.

[0028] By setting the first fan blade 4 and the second fan blade 5, this application can make good use of the kinetic energy of the steam exhaust gas, so that the air in the air heating tube 2 can flow from the air inlet section 21 to the boiler air supply section 23 without the need for an additional power device to drive it. When the air flows, it can be well heated by the steam in the first spiral section 12 when it passes through the spiral heating chamber 221. The air that finally flows into the boiler combustion chamber has a high heat, which can help improve the boiler combustion efficiency.

[0029] like Figure 1 and 4 As shown, in this embodiment, the first spiral segment 12 is located above the second spiral segment 13, the steam receiving segment 11 is inclined, and the lower end of the steam receiving segment 11 is connected to the upper end of the first spiral segment 12. The water formed inside the steam receiving section 11, the first spiral section 12, and the second spiral section 13 can flow to the condensate recovery section 14 under the action of gravity.

[0030] In this application, the steam exhaust gas flows from high to low, and the condensed water during the heat exchange process can automatically flow to the lowest condensate recovery section 14 under the action of gravity.

[0031] In this application, because the first fan blade 4 drives the second fan blade 5 to rotate, the air inside the air heating tube 2 can flow from low to high.

[0032] like Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the steam receiving section 11 has a first mounting cavity 111, and the first fan blade 4 is rotatably mounted on the first mounting cavity 111. The boiler gas supply section 23 has a second mounting cavity 231, and the second fan blade 5 is rotatably mounted on the second mounting cavity 231.

[0033] like Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the first mounting cavity 111 is positioned upward relative to the steam receiving section 11, and the second mounting cavity 231 is positioned downward relative to the boiler gas supply section 23.

[0034] The first mounting cavity 111 is set upward relative to the steam receiving section 11, that is, the first fan blade 4 is set off to the side. This allows the steam exhaust gas to better drive the first fan blade 4 to rotate after entering the steam receiving section 11. The second mounting cavity 231 is set downward relative to the boiler air supply section 23, that is, the second fan blade 5 is set off to the side. This allows the second fan blade 5 to better drive the air in the air heating pipe 2 to circulate when it rotates.

[0035] like Figure 1As shown, in this embodiment, the end of the air inlet section 21 has a flared structure 211.

[0036] In this embodiment, the condensing heat exchange box 3 is a water tank. The condensing heat exchange box 3 has an inlet pipe 31 and an outlet pipe 32. The inlet pipe 31 is located at the lower part of the condensing heat exchange box 3, and the outlet pipe 32 is located at the upper part of the condensing heat exchange box 3. In actual use, a circulation pump (not shown in the figure) is installed on the inlet pipe 31.

[0037] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A steam waste heat utilization device, characterized in that, This includes recycling pipes, air heating pipes, and condensation heat exchangers; The recycling pipe has a steam receiving section, a first spiral section, a second spiral section, and a condensate recovery section connected in sequence. The air heating pipe has an air inlet section, a spiral heating section and a boiler air supply section connected in sequence. The inner diameter of the spiral heating section is larger than the outer diameter of the first spiral section. The first spiral section is located inside the spiral heating section. A spiral heating cavity that allows air to pass through is formed between the spiral heating section and the first spiral section, covering the outer surface of the first spiral section. A first fan blade is rotatably installed in the steam receiving section, and a second fan blade is rotatably installed in the boiler gas supply section. The rotation axis of the second fan blade and the rotation axis of the first fan blade are coaxial and fixed to each other. The steam receiving section is used to receive steam exhaust gas from the boiler, and the boiler air supply section is used to supply air to the boiler combustion chamber. When the steam waste heat utilization device is working, the steam exhaust gas enters the steam receiving section, which drives the first fan blade to rotate. The first fan blade drives the second fan blade to rotate synchronously. The rotation of the second fan blade causes the air in the air heating tube to flow into the boiler combustion chamber after passing through the air inlet section, the spiral heating section and the boiler air supply section in sequence.

2. The steam waste heat utilization device as described in claim 1, characterized in that, The condensate recovery section is used to connect to the boiler's inlet pipe; The second spiral section is located in the condensation heat exchange box, which is used to condense the remaining steam in the second spiral section into water; The air inlet section is connected to the external atmosphere.

3. The steam waste heat utilization device as described in claim 1, characterized in that, The first spiral segment is located above the second spiral segment, the steam receiving segment is inclined, and the lower end of the steam receiving segment is connected to the upper end of the first spiral segment. The water formed inside the steam receiving section, the first spiral section, and the second spiral section can flow to the condensate recovery section under the action of gravity.

4. The steam waste heat utilization device as described in claim 3, characterized in that, The steam receiving section has a first mounting cavity, and the first fan blade is rotatably mounted on the first mounting cavity; The boiler gas supply section has a second mounting cavity, and the second fan blade is rotatably mounted on the second mounting cavity.

5. The steam waste heat utilization device as described in claim 4, characterized in that, The first mounting cavity is positioned upward relative to the steam receiving section, and the second mounting cavity is positioned downward relative to the boiler gas supply section.

6. The steam waste heat utilization device as described in claim 1, characterized in that, The air inlet section has a flared end.

7. The steam waste heat utilization device as described in claim 1, characterized in that, The condensation heat exchange box is a water tank.

8. The steam waste heat utilization device as described in claim 7, characterized in that, The condensation heat exchanger has an inlet pipe and an outlet pipe.

9. The steam waste heat utilization device as described in claim 8, characterized in that, The inlet pipe is located at the bottom of the condenser heat exchanger, and the outlet pipe is located at the top of the condenser heat exchanger.

10. The steam waste heat utilization device as described in claim 1, characterized in that, A circulation pump is installed on the water inlet pipe.

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