CN211177890U - Vertical cylindrical tube type heating furnace - Google Patents
Vertical cylindrical tube type heating furnace Download PDFInfo
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- CN211177890U CN211177890U CN201921199836.3U CN201921199836U CN211177890U CN 211177890 U CN211177890 U CN 211177890U CN 201921199836 U CN201921199836 U CN 201921199836U CN 211177890 U CN211177890 U CN 211177890U
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Abstract
The utility model discloses a vertical cylindrical tubular heating furnace, which comprises a furnace body, wherein the top of the furnace body is connected with a chimney, and the chimney is connected with a waste heat recovery device; a burner and a delivery oil pipe are arranged in the furnace body, the burner is connected with a gas pipeline and a combustion-supporting gas pipeline, and the combustion-supporting gas pipe penetrates through the waste heat recovery device; the waste heat recovery device comprises a waste heat recovery tank, a flue gas inlet pipe, a flue gas outlet pipe, a spray header, a partition plate and a drain pipe; the upper part of one side of the waste heat recovery tank is connected with a chimney through a flue gas outlet pipe, the lower part of one side of the waste heat recovery tank is connected with the chimney through a flue gas inlet pipe, and the upper part of the other side of the waste heat recovery tank is connected with a combustion-supporting gas inlet pipe; the combustion-supporting gas outlet pipe is connected with the combustor through a combustion-supporting gas fan; a partition plate is obliquely arranged in the waste heat recovery box, and a flue gas through hole is formed in one side of the partition plate, which is far away from the flue gas inlet pipe; a blocking plate is arranged in the chimney. The utility model discloses a vertical cylinder tubular heating furnace can effectual reduction calorific loss, reduce the exhaust gas temperature, retrieves the waste heat, and with low costs, convenient transformation.
Description
Technical Field
The invention relates to the technical field of heating furnaces, in particular to a vertical cylindrical tubular heating furnace.
Background
The tubular heating furnace is a process heating furnace used in petroleum refining, petrochemical industry, coal chemical industry, tar processing, crude oil transportation and other industries, the medium of the heated material flowing in the tube is gas or liquid, and is flammable and explosive, the operation condition is harsh, meanwhile, the tubular heating furnace is operated uninterruptedly for a long period, and the heating mode is directly fired.
The tubular heating furnace is a directly heated heating device, mainly used for heating liquid or gas chemical raw materials, and the used fuel usually comprises fuel oil and fuel gas. The heat transfer mode of the tubular heating furnace is mainly radiation heat transfer and is widely applied. But the smoke discharged by the tubular heating furnace is heavy in pollution. There are major problems in that: 1. the problem of waste heat recovery and utilization; 2. energy conservation, environmental protection and operation cost. The problem of waste heat recovery and utilization is solved, for example, Chinese patent CN201120001723.5 in the prior art, a centralized recovery device of waste heat of a tubular heating furnace is disclosed, which comprises at least two tubular heating furnaces arranged in parallel, wherein a flue gas inlet of the waste heat recoverer is connected with a main flue, a flue gas outlet is connected with a draught fan and is connected with a main discharge chimney, the main flue is connected to a chimney at the lower side of a chimney turning plate of each tubular heating furnace through a branch flue, an air inlet of the heat pipe waste heat recoverer is provided with an air blower, and a preheated air outlet is connected with a main air pipe, and the main air pipe is connected with an air surrounding. The recovery effect is poor, and the waste heat utilization rate is low. The emission temperature is higher, when leading to the flue gas emission, produces more white cigarette, takes place the condensation erosion easily simultaneously. 2. The energy-saving and environment-friendly combustion-supporting device has the problems of energy conservation, environmental protection and operation cost, and because the fuel and the combustion-supporting gas (air or oxygen) adopted by the combustion furnace are combusted in the combustor, high-temperature flue gas (the temperature of the flue gas can reach about 1500 ℃) is formed; and then heat is exchanged in the combustion chamber by adopting a conveying oil pipe and the like, and heat is conveyed out by adopting the conveying oil pipe. During fuel combustion, want to improve the combustion effect of fuel, can preheat fuel, what preheat among the prior art generally adopted is with, and fuel lets in carries out the heat transfer in the combustion chamber and makes it preheat, but this kind of heat transfer mode, on the one hand dangerous big (the temperature in the combustion chamber is too high), and on the other hand absorbs the heat and has influenced the heat exchange efficiency of transport oil pipe originally. Therefore, a reasonable, effective, energy-saving and environment-friendly preheating mode with cost saving is a current main problem.
Meanwhile, the existing heating furnace which is installed is difficult to effectively reform.
Disclosure of Invention
In order to solve the problems, the invention discloses a vertical cylindrical tubular heating furnace which can effectively reduce heat loss, reduce exhaust gas temperature and recover waste heat, and is low in cost and convenient to reform.
In order to achieve the above purpose, the invention provides the following technical scheme:
a vertical cylindrical tubular heating furnace comprises a furnace body, wherein the top of the furnace body is connected with a chimney, and the chimney is connected with a waste heat recovery device; the interior of the furnace body is sequentially divided into a convection chamber and a radiation chamber from top to bottom; a combustor and a delivery oil pipe are arranged in the furnace body, and the combustor is arranged at the bottom of the furnace body; the combustor is connected with a gas pipeline and a combustion-supporting gas pipeline, and the combustion-supporting gas pipe penetrates through the waste heat recovery device; the conveying oil pipe penetrates into the furnace body from one side of the radiation chamber, and penetrates out from the other side of the convection chamber;
the waste heat recovery device comprises a waste heat recovery tank, a flue gas inlet pipe, a flue gas outlet pipe, a spray header, a partition plate and a drain pipe; the upper part of one side of the waste heat recovery tank is connected with a chimney through a flue gas outlet pipe, the lower part of one side of the waste heat recovery tank is connected with the chimney through a flue gas inlet pipe, and the upper part of the other side of the waste heat recovery tank is connected with a combustion-supporting gas inlet pipe; a combustion-supporting gas outlet pipe is arranged below the flue gas inlet pipe, and a combustion-supporting gas pipeline is arranged between the combustion-supporting gas inlet pipe and the combustion-supporting gas outlet pipe; the combustion-supporting gas outlet pipe is connected with the combustor through a combustion-supporting gas fan; the top of the waste heat recovery box is provided with a spray header, a partition plate is obliquely arranged in the waste heat recovery box, and one side of the partition plate, which is far away from the flue gas inlet pipe, is provided with a flue gas through hole; the waste heat recovery tank is communicated with a drain pipe, and the drain pipe is positioned on the lower side of the partition plate;
the chimney is internally provided with a blocking plate, the smoke inlet pipe is positioned below the blocking plate, and the smoke outlet pipe is positioned above the blocking plate.
Further, the combustor adopts a dual combustor. The combustor has the advantages of good combustion effect, high heat intensity, good heat transfer effect, high utilization rate, fuel saving, energy saving and environmental protection, and fuel and combustion-supporting gas are fully contacted and combusted in the combustor.
Furthermore, a corrosion-resistant layer is arranged in the waste heat recovery tank. The corrosion-resistant layer effectively protects the waste heat recovery tank and prevents the waste heat recovery tank from being corroded by the flue gas.
Furthermore, a through pipe is arranged on the blocking plate, and a one-way valve is arranged on the through pipe. The arrangement of the through pipe and the one-way valve enables the flue gas not to be directly discharged from the chimney through the waste heat recovery device. When the temperature of the flue gas is lower or the combustion is not violent, the generated heat can be directly discharged without passing through a waste heat recovery device.
Furthermore, the combustion-supporting gas pipeline is Z-shaped in the waste heat recovery tank. The Z-shaped combustion-supporting gas pipeline ensures that the combustion-supporting gas (air) has long residence time in the waste heat recovery tank.
Further, the gas pipe passes through a convection chamber. The gas pipeline is through convection current room for the gas is at the indoor waste heat of convection current, makes the combustion effect of fuel better, and the burning is more abundant.
The invention has the beneficial effects that:
the gas and the combustion-supporting gas (air) enter the combustor to be combusted, and then heat is absorbed and utilized by the oil conveying pipeline in the convection chamber and the radiation chamber to realize heat convection exchange; the temperature of the flue gas in the radiation chamber is up to 1200 ℃ and 1500 ℃; then the temperature of the flue gas entering the flue gas is also 300-400 ℃; then, the flue gas enters a waste heat recovery device, on one hand, the waste heat is recycled, and the preheating of the combustion-supporting gas is realized; on the other hand, the cooling of flue gas is realized, reduces the use of condenser among the prior art. The invention saves cost, has convenient installation of the device structure, is not only suitable for a new heating furnace, but also very convenient for the reconstruction of an old heating furnace, only needs to add a separation plate on the chimney, and then the chimney is connected with a waste heat recovery device, and has low reconstruction cost.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: the waste heat recovery device comprises a furnace body 1, a chimney 2, a waste heat recovery device 3, a convection chamber 4, a radiation chamber 5, a combustor 6, a delivery oil pipe 7, a fuel gas pipeline 8, a combustion-supporting gas (air) pipeline 9, a waste heat recovery box 31, a flue gas inlet pipe 32, a flue gas outlet pipe 33, a spray header 34, a partition plate 35, a drain pipe 36, a combustion-supporting gas inlet pipe 37, a combustion-supporting gas outlet pipe 38, a flue gas through hole 39, a combustion-supporting gas fan 10 and a separation plate 11.
Wherein the arrows in the figure respectively indicate: the flowing direction of fuel gas in the fuel gas pipeline, the flowing direction of combustion-supporting gas in the combustion-supporting gas pipeline and the flowing direction of hot oil in the oil conveying pipe.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example 1
As shown in figure 1, the vertical cylindrical tubular heating furnace comprises a furnace body 1, wherein the top of the furnace body is connected with a chimney 2, and the chimney is connected with a waste heat recovery device 3. The gas is burnt in the furnace body to release heat, and then heat exchange is carried out through a delivery oil pipe in the furnace body to realize liquid heating.
The interior of the furnace body is divided into a convection chamber 4 and a radiation chamber 5 from top to bottom in sequence. The temperature in the radiation chamber is high, the arrangement of the delivery oil pipe is less, the damage of a high-temperature flue to the delivery oil pipe is avoided, the temperature in the convection chamber is lower relative to the radiation chamber, and the convection chamber is a main space for realizing heat exchange of the delivery oil pipe.
A burner 6 and a delivery oil pipe 7 are arranged in the furnace body, and the burner is arranged at the bottom of the furnace body; the burner is connected with a gas pipeline 8 and a combustion-supporting gas (air) pipeline 9, and a combustion-supporting gas pipe penetrates through the waste heat recovery device; the oil pipe penetrates into the furnace body from one side of the radiation chamber, and the oil pipe penetrates out from the other side of the convection chamber. The fuel gas and the combustion-supporting gas enter the combustor, then the heat release is realized, and then the heat exchange between the liquid to be heated and the high-temperature flue gas is realized by the oil conveying pipe.
The waste heat recovery device comprises a waste heat recovery tank 31, a flue gas inlet pipe 32, a flue gas outlet pipe 33, a spray header 34, a partition plate 35 and a drain pipe 36; the upper part of one side of the waste heat recovery tank is connected with a chimney through a flue gas outlet pipe, the lower part of one side of the waste heat recovery tank is connected with the chimney through a flue gas inlet pipe, and the upper part of the other side of the waste heat recovery tank is connected with a combustion-supporting gas inlet pipe 37; a combustion-supporting gas outlet pipe 38 is arranged below the flue gas inlet pipe, and a combustion-supporting gas pipeline is arranged between the combustion-supporting gas inlet pipe and the combustion-supporting gas outlet pipe; the combustion-supporting gas outlet pipe is connected with a combustor through a combustion-supporting gas fan 10; the top of the waste heat recovery box is provided with a spray header, a partition plate is obliquely arranged in the waste heat recovery box, and one side of the partition plate, which is far away from the flue gas inlet pipe, is provided with a flue gas through hole 39; the waste heat recovery box is communicated with a drain pipe, and the drain pipe is positioned on the lower side of the partition plate. Air enters the waste heat recovery tank from the combustion-supporting gas inlet pipe, and then enters the combustor from the combustion-supporting gas outlet pipe through the combustion-supporting gas fan after heat exchange in the waste heat recovery tank. High-temperature flue gas of a chimney enters the lower part of the waste heat recovery tank from the flue gas inlet pipe, then exchanges heat with air, enters the upper part of the waste heat recovery tank from the flue gas through holes of the partition plate, is sprayed and cleaned by the spray header, cleans most harmful substances in the flue gas, further reduces the temperature of the flue gas, reduces the temperature of the flue gas to about 150 ℃, and then returns the flue gas to the chimney from the flue gas outlet pipe for emission.
Be equipped with baffler 11 in the chimney, the flue gas advances the pipe and is located baffler below, and the flue gas exit tube is located baffler top.
In the present embodiment, the burner employs a dual burner. The combustor has the advantages of good combustion effect, high heat intensity, good heat transfer effect, high utilization rate, fuel saving, energy saving and environmental protection, and fuel and combustion-supporting gas are fully contacted and combusted in the combustor.
In this embodiment, a corrosion-resistant layer is provided in the waste heat recovery tank. The corrosion-resistant layer effectively protects the waste heat recovery tank and prevents the waste heat recovery tank from being corroded by the flue gas.
In other embodiments, the blocking plate is provided with a through pipe, and the through pipe is provided with a one-way valve. The arrangement of the through pipe and the one-way valve enables the flue gas not to be directly discharged from the chimney through the waste heat recovery device. When the temperature of the flue gas is lower or the combustion is not violent, the generated heat can be directly discharged without passing through a waste heat recovery device.
In this embodiment, the combustion-supporting gas pipe is Z-shaped in the waste heat recovery tank. The Z-shaped combustion-supporting gas pipeline ensures that the combustion-supporting gas (air) has long residence time in the waste heat recovery tank.
In this embodiment, the gas conduit passes through the convection chamber. The gas pipeline is through convection current room for the gas is at the indoor waste heat of convection current, makes the combustion effect of fuel better, and the burning is more abundant.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (6)
1. A vertical cylindrical tube heating furnace is characterized in that: the waste heat recovery device comprises a furnace body, wherein the top of the furnace body is connected with a chimney, and the chimney is connected with a waste heat recovery device; the interior of the furnace body is sequentially divided into a convection chamber and a radiation chamber from top to bottom; a combustor and a delivery oil pipe are arranged in the furnace body, and the combustor is arranged at the bottom of the furnace body; the combustor is connected with a gas pipeline and a combustion-supporting gas pipeline, and the combustion-supporting gas pipe penetrates through the waste heat recovery device; the conveying oil pipe penetrates into the furnace body from one side of the radiation chamber, and penetrates out from the other side of the convection chamber;
the waste heat recovery device comprises a waste heat recovery tank, a flue gas inlet pipe, a flue gas outlet pipe, a spray header, a partition plate and a drain pipe; the upper part of one side of the waste heat recovery tank is connected with a chimney through a flue gas outlet pipe, the lower part of one side of the waste heat recovery tank is connected with the chimney through a flue gas inlet pipe, and the upper part of the other side of the waste heat recovery tank is connected with a combustion-supporting gas inlet pipe; a combustion-supporting gas outlet pipe is arranged below the flue gas inlet pipe, and a combustion-supporting gas pipeline is arranged between the combustion-supporting gas inlet pipe and the combustion-supporting gas outlet pipe; the combustion-supporting gas outlet pipe is connected with the combustor through a combustion-supporting gas fan; the top of the waste heat recovery box is provided with a spray header, a partition plate is obliquely arranged in the waste heat recovery box, and one side of the partition plate, which is far away from the flue gas inlet pipe, is provided with a flue gas through hole; the waste heat recovery tank is communicated with a drain pipe, and the drain pipe is positioned on the lower side of the partition plate;
the chimney is internally provided with a blocking plate, the smoke inlet pipe is positioned below the blocking plate, and the smoke outlet pipe is positioned above the blocking plate.
2. The vertical cylindrical tube-type heating furnace according to claim 1, wherein: the burner adopts a double burner.
3. The vertical cylindrical tube-type heating furnace according to claim 1, wherein: and the waste heat recovery box is internally provided with a corrosion-resistant layer.
4. The vertical cylindrical tube-type heating furnace according to claim 1, wherein: the blocking plate is provided with a through pipe, and the through pipe is provided with a one-way valve.
5. The vertical cylindrical tube-type heating furnace according to claim 4, wherein: the combustion-supporting gas pipeline is Z-shaped in the waste heat recovery tank.
6. The vertical cylindrical tube-type heating furnace according to claim 1, wherein: the gas conduit passes through a convection chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921199836.3U CN211177890U (en) | 2019-07-29 | 2019-07-29 | Vertical cylindrical tube type heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921199836.3U CN211177890U (en) | 2019-07-29 | 2019-07-29 | Vertical cylindrical tube type heating furnace |
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| CN211177890U true CN211177890U (en) | 2020-08-04 |
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| CN201921199836.3U Active CN211177890U (en) | 2019-07-29 | 2019-07-29 | Vertical cylindrical tube type heating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440578A (en) * | 2019-07-29 | 2019-11-12 | 盐城市自强化纤机械有限公司 | A kind of vertical and cylindrical tubular heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440578A (en) * | 2019-07-29 | 2019-11-12 | 盐城市自强化纤机械有限公司 | A kind of vertical and cylindrical tubular heater |
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