CN216079752U - Flue gas waste heat utilization equipment of natural gas boiler - Google Patents
Flue gas waste heat utilization equipment of natural gas boiler Download PDFInfo
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- CN216079752U CN216079752U CN202122809575.6U CN202122809575U CN216079752U CN 216079752 U CN216079752 U CN 216079752U CN 202122809575 U CN202122809575 U CN 202122809575U CN 216079752 U CN216079752 U CN 216079752U
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Abstract
The utility model discloses a flue gas waste heat utilization device of a natural gas boiler, which comprises a water storage tank, an oxygen storage tank and a flue gas concentration pipe, wherein the water storage tank is connected with the oxygen storage tank; an oxygen pipe is fixedly connected to the outer wall of one side of the oxygen storage tank; an oxygen valve is fixedly connected with the outer wall of one side of the oxygen pipe; the outer wall of one side of the oxygen valve is fixedly connected with a gas mixing cavity. According to the design of the natural gas boiler, flue gas enters the gas mixing cavity to further exchange heat between the carried heat and water stored in the water storage tank, so that the heat exchange efficiency between the heat in the flue gas and the water in the water storage tank is high, when oxygen is required to be added in natural gas filtration, the exhaust valve is closed, the oxygen valve is opened, the oxygen stored in the oxygen storage tank enters the gas mixing cavity to be mixed with the flue gas, then the output valve is opened to introduce the mixed gas into the natural gas boiler, the oxygen concentration in the boiler can be reduced by using inert gas, the tail gas of the natural gas boiler is recycled, and the effects of saving energy and reducing emission are achieved.
Description
Technical Field
The utility model relates to the technical field of natural gas boilers, in particular to a flue gas waste heat utilization device of a natural gas boiler.
Background
Natural gas steam boiler is a kind of gas steam boiler, natural gas steam boiler uses the natural gas as fuel, the heat that comes out in the burning of stove, heat the water in the pot, and make its heat energy conversion equipment who vaporizes into steam, water is constantly by the energy heating temperature rise that the burning of the gas fuel released in the stove in the boiler and produce the pressure steam, at present, among the prior art, natural gas boiler can produce a large amount of flue gas at the during operation, and the flue gas itself contains a large amount of heat, and heat is an energy, can retrieve and utilize it, the energy conversion rate of improve equipment, therefore, need for a natural gas boiler's flue gas waste heat utilization equipment urgently.
Through the retrieval, chinese patent application No. CN201520610042.7 discloses a flue gas waste heat utilization device of a natural gas boiler, which comprises a plate heat exchanger arranged at the tail of a natural gas boiler, wherein the top of the plate heat exchanger is provided with a flue gas inlet, the bottom of the plate heat exchanger is provided with a water collecting tank, and the plate heat exchanger is sequentially provided with an air outlet, an air inlet, a water replenishing outlet and a water replenishing inlet from top to bottom along the flow direction of flue gas.
The flue gas waste heat utilization device of the natural gas boiler in the patent has the following defects: the flue gas waste heat utilization device of the natural gas boiler only recovers and recycles heat in flue gas, and the flue gas is not utilized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a flue gas waste heat utilization device of a natural gas boiler.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a flue gas waste heat utilization device of a natural gas boiler comprises a water storage tank, an oxygen storage tank and a flue gas concentration pipe; an oxygen pipe is fixedly connected to the outer wall of one side of the oxygen storage tank; an oxygen valve is fixedly connected with the outer wall of one side of the oxygen pipe; the outer wall of one side of the oxygen valve is fixedly connected with a gas mixing cavity.
Preferably: the outer wall of the bottom end of the gas mixing cavity is fixedly connected with a bottom connecting pipe; the outer wall of the bottom end of the bottom connecting pipe is fixedly connected with an output valve; the outer wall of one side of the output valve is fixedly connected with a gas input pipe.
Preferably: the outer wall of the top end of the gas mixing cavity is fixedly connected with a top connecting pipe; the outer wall of the top end of the top connecting pipe is fixedly connected with an exhaust valve; the outer wall of one side of the exhaust valve is fixedly connected with an exhaust pipeline.
Preferred for the present invention are: the peripheral outer walls of the bottom connecting pipe and the top connecting pipe are fixedly connected with the inner wall of one side of the water storage tank; the inner wall of the other side of the water storage tank is fixedly connected with a conveying water pipe; the outer wall of one side adjacent to the water storage tank is fixedly connected with a water inlet.
As a preferable aspect of the present invention: the outer walls of the two sides of the flue gas concentration pipe are fixedly connected with heat insulation communicating pipes which are uniformly distributed; the outer wall of the bottom end of the heat insulation communicating pipe is fixedly connected with a heat exchange arc-shaped pipe; the outer wall of one side of the heat exchange arc-shaped pipe is fixedly connected with the outer wall of one side of the top connecting pipe; the heat exchange arc-shaped pipe is positioned inside the water storage tank.
As a preferable aspect of the present invention: the conveying water pipe comprises an arc-shaped water pipe and a scale filtering net; the peripheral outer wall of the arc-shaped water pipe is fixedly connected with the inner wall of the other side of the water storage tank; the outer wall all around of incrustation scale filter screen is fixed connection in arc water pipe bottom inner wall.
The utility model has the beneficial effects that:
1. carbon dioxide and nitrogen are contained in natural gas boiler flue gas collected by a flue gas concentration pipe, the flue gas is not polluted, the flue gas is transmitted into a heat exchange arc-shaped pipe through a heat insulation communicating pipe to exchange heat with water stored in a water storage tank, then the flue gas enters a top connecting pipe, an exhaust valve is in a closed state at the moment, the flue gas enters a gas mixing chamber to further exchange heat between the carried heat and the water stored in the water storage tank, so that the heat in the flue gas and the water in the water storage tank have high heat exchange efficiency, then the exhaust valve is opened to discharge the flue gas, when oxygen is required to be added into natural gas filtration, the exhaust valve is closed, an oxygen valve is opened, the oxygen stored in the oxygen storage tank enters the gas mixing chamber to be mixed with the flue gas, then an output valve is opened to introduce the mixed gas into a natural gas boiler, and the oxygen concentration in the boiler can be reduced by using inert gas, thereby reach control flame temperature, make the burning unlikely to too fast, the production of nitrogen oxide also can become less like this, improves the practicality of device, realizes that the tail gas of natural gas boiler recycles, reaches energy saving and emission reduction's effect.
2. Can get rid of the incrustation scale and other impurity that exist in the water storage tank through the incrustation scale filter screen, avoid impurity incrustation scale to get into the heat conduction effect that influences the boiler in the natural gas boiler, reduce the energy conversion rate of natural gas boiler.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a flue gas waste heat utilization device of a natural gas boiler according to the present invention;
FIG. 2 is a schematic view of the internal form of a water storage tank of the flue gas waste heat utilization device of the natural gas boiler provided by the utility model;
FIG. 3 is a schematic diagram of a gas mixing cavity of a flue gas waste heat utilization device of a natural gas boiler according to the present invention;
fig. 4 is a schematic state diagram of a conveying water pipe of the flue gas waste heat utilization device of the natural gas boiler.
In the figure: 1-water storage tank, 2-oxygen storage tank, 3-oxygen valve, 4-gas input pipe, 5-heat insulation communicating pipe, 6-flue gas concentration pipe, 7-water inlet, 8-gas mixing chamber, 9-conveying water pipe, 901-arc water pipe, 902-scale filter screen, 10-exhaust pipe, 11-oxygen pipe, 12-heat exchange arc pipe, 13-output valve, 14-bottom connecting pipe, 15-top connecting pipe and 16-exhaust valve.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, 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 exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not to be construed as limiting the device, structure, or element to which reference is made to have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1:
a flue gas waste heat utilization device of a natural gas boiler is shown in figures 1-3 and comprises a water storage tank 1, an oxygen storage tank 2 and a flue gas concentration pipe 6; an oxygen pipe 11 is fixedly connected to the outer wall of one side of the oxygen storage tank 2; the outer wall of one side of the oxygen pipe 11 is fixedly connected with an oxygen valve 3; the outer wall of one side of the oxygen valve 3 is fixedly connected with a gas mixing cavity 8; the outer wall of the bottom end of the gas mixing cavity 8 is fixedly connected with a bottom connecting pipe 14; the outer wall of the bottom end of the bottom connecting pipe 14 is fixedly connected with an output valve 13; the outer wall of one side of the output valve 13 is fixedly connected with a gas input pipe 4; the outer wall of the top end of the gas mixing cavity 8 is fixedly connected with a top connecting pipe 15; the outer wall of the top end of the top connecting pipe 15 is fixedly connected with an exhaust valve 16; the outer wall of one side of the exhaust valve 16 is fixedly connected with an exhaust pipeline 10; the peripheral outer walls of the bottom connecting pipe 14 and the top connecting pipe 15 are fixedly connected with the inner wall of one side of the water storage tank 1; the inner wall of the other side of the water storage tank 1 is fixedly connected with a conveying water pipe 9; the outer wall of one side adjacent to the water storage tank 1 is fixedly connected with a water inlet 7; the outer walls of the two sides of the flue gas concentration pipe 6 are fixedly connected with heat insulation communicating pipes 5 which are uniformly distributed; the outer wall of the bottom end of the heat insulation communicating pipe 5 is fixedly connected with a heat exchange arc-shaped pipe 12; the outer wall of one side of the heat exchange arc-shaped pipe 12 is fixedly connected with the outer wall of one side of the top connecting pipe 15; the heat exchange arc-shaped pipe 12 is positioned inside the water storage tank 1; carbon dioxide and nitrogen are contained in natural gas boiler flue gas collected by the flue gas concentration pipe 6, the flue gas is not polluted, the flue gas is transmitted into the heat exchange arc-shaped pipe 12 through the heat insulation communicating pipe 5 to carry out heat exchange with water stored in the water storage tank 1, then the flue gas enters the top connecting pipe 15, the exhaust valve 16 is in a closed state at the moment, the flue gas enters the gas mixing chamber 8 to further carry out heat exchange between the carried heat and the water stored in the water storage tank 1, the heat exchange efficiency between the heat in the flue gas and the water in the water storage tank 1 is high, then the exhaust valve 16 is opened to discharge the flue gas, when oxygen needs to be added into natural gas filtration, the exhaust valve 16 is closed, the oxygen valve 3 is opened, the oxygen stored in the oxygen storage tank 2 enters the gas mixing chamber 8 to be mixed with the flue gas, then the output valve 13 is opened to introduce the mixed gas into the natural gas boiler, the inert gas is utilized to reduce the oxygen concentration in the furnace, so that the flame temperature is controlled, the burning is not too fast, the generation of nitrogen oxides is reduced, the practicability of the device is improved, the tail gas of the natural gas boiler is recycled, and the effects of energy conservation and emission reduction are achieved.
In order to avoid that the energy conversion rate of the natural gas boiler is affected by scale generated after water in the water storage tank 1 is heated, as shown in fig. 4, the delivery water pipe 9 comprises an arc-shaped water pipe 901 and a scale filtering net 902; the peripheral outer wall of the arc-shaped water pipe 901 is fixedly connected with the inner wall of the other side of the water storage tank 1; the peripheral outer wall of the scale filter screen 902 is fixedly connected with the inner wall of the bottom end of the arc-shaped water pipe 901; can get rid of the incrustation scale and other impurity that exist in the storage water tank 1 through incrustation scale filter screen 902, avoid impurity incrustation scale to get into the heat conduction effect that influences the boiler in the natural gas boiler, reduce the energy conversion rate of natural gas boiler.
When the natural gas boiler is used, carbon dioxide and nitrogen are contained in natural gas boiler flue gas collected by the flue gas concentration pipe 6, no pollution is caused to the flue gas, the flue gas is transmitted into the heat exchange arc-shaped pipe 12 through the heat insulation communicating pipe 5 to exchange heat with water stored in the water storage tank 1, then the flue gas enters the top connecting pipe 15, the exhaust valve 16 is in a closed state, the flue gas enters the gas mixing chamber 8 to further exchange heat between the carried heat and the water stored in the water storage tank 1, so that the heat in the flue gas and the water heat exchange efficiency of the water in the water storage tank 1 are high, then the exhaust valve 16 is opened to exhaust the flue gas, when oxygen needs to be added into natural gas filtration, the exhaust valve 16 is closed, the oxygen valve 3 is opened, the oxygen stored in the oxygen storage tank 2 enters the gas mixing chamber 8 to be mixed with the flue gas, then the output valve 13 is opened to introduce the mixed gas into the natural gas boiler, utilize inert gas can reduce the interior oxygen concentration of stove to reach control flame temperature, make the burning be unlikely to too fast, nitrogen oxide's production also can become few like this, improve the practicality of device, realize the tail gas of natural gas boiler and recycle, reach energy saving and emission reduction's effect, can get rid of the incrustation scale and other impurity that exist in the storage water tank 1 through incrustation scale filter screen 902, avoid impurity incrustation scale to get into the heat conduction effect that influences the boiler in the natural gas boiler, reduce natural gas boiler's energy conversion rate.
The above description is for the purpose of illustrating the preferred embodiments of the present invention and is not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed, and all modifications, equivalents, and improvements that may occur to those skilled in the art and that fall within the spirit and scope of the utility model are intended to be embraced therein.
Claims (6)
1. A flue gas waste heat utilization device of a natural gas boiler comprises a water storage tank (1), an oxygen storage tank (2) and a flue gas concentration pipe (6), and is characterized in that an oxygen pipe (11) is fixedly connected to the outer wall of one side of the oxygen storage tank (2); an oxygen valve (3) is fixedly connected with the outer wall of one side of the oxygen pipe (11); the outer wall of one side of the oxygen valve (3) is fixedly connected with a gas mixing cavity (8).
2. The flue gas waste heat utilization device of the natural gas boiler as claimed in claim 1, wherein a bottom connecting pipe (14) is fixedly connected to the outer wall of the bottom end of the gas mixing cavity (8); the outer wall of the bottom end of the bottom connecting pipe (14) is fixedly connected with an output valve (13); the outer wall of one side of the output valve (13) is fixedly connected with a gas input pipe (4).
3. The flue gas waste heat utilization device of the natural gas boiler as claimed in claim 2, wherein the outer wall of the top end of the gas mixing cavity (8) is fixedly connected with a top connecting pipe (15); the outer wall of the top end of the top connecting pipe (15) is fixedly connected with an exhaust valve (16); an exhaust pipeline (10) is fixedly connected with the outer wall of one side of the exhaust valve (16).
4. The flue gas waste heat utilization device of the natural gas boiler according to claim 3, wherein the peripheral outer walls of the bottom connecting pipe (14) and the top connecting pipe (15) are fixedly connected to the inner wall of one side of the water storage tank (1); the inner wall of the other side of the water storage tank (1) is fixedly connected with a conveying water pipe (9); the outer wall of one side adjacent to the water storage tank (1) is fixedly connected with a water inlet (7).
5. The flue gas waste heat utilization device of the natural gas boiler according to claim 4, wherein the outer walls of two sides of the flue gas concentration pipe (6) are fixedly connected with heat insulation communicating pipes (5) which are uniformly distributed; the outer wall of the bottom end of the heat insulation communicating pipe (5) is fixedly connected with a heat exchange arc-shaped pipe (12); the outer wall of one side of the heat exchange arc-shaped pipe (12) is fixedly connected with the outer wall of one side of the top connecting pipe (15); the heat exchange arc-shaped pipe (12) is positioned inside the water storage tank (1).
6. The flue gas waste heat utilization device of the natural gas boiler is characterized in that the water conveying pipe (9) comprises an arc-shaped water pipe (901) and a scale filtering net (902); the peripheral outer walls of the arc-shaped water pipes (901) are fixedly connected to the inner wall of the other side of the water storage tank (1); the peripheral outer wall of the scale filter screen (902) is fixedly connected with the inner wall of the bottom end of the arc-shaped water pipe (901).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809575.6U CN216079752U (en) | 2021-11-17 | 2021-11-17 | Flue gas waste heat utilization equipment of natural gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809575.6U CN216079752U (en) | 2021-11-17 | 2021-11-17 | Flue gas waste heat utilization equipment of natural gas boiler |
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| Publication Number | Publication Date |
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| CN216079752U true CN216079752U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122809575.6U Active CN216079752U (en) | 2021-11-17 | 2021-11-17 | Flue gas waste heat utilization equipment of natural gas boiler |
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| CN (1) | CN216079752U (en) |
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- 2021-11-17 CN CN202122809575.6U patent/CN216079752U/en active Active
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