CN210511611U - Gas steam generating device - Google Patents
Gas steam generating device Download PDFInfo
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- CN210511611U CN210511611U CN201921362673.6U CN201921362673U CN210511611U CN 210511611 U CN210511611 U CN 210511611U CN 201921362673 U CN201921362673 U CN 201921362673U CN 210511611 U CN210511611 U CN 210511611U
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Abstract
The utility model relates to a gas steam generator belongs to energy technical field. The gas-fired steam boiler inputs water and combustible gas, the water is heated to form steam, flue gas generated after the combustible gas is combusted sequentially passes through the heat exchanger and the economizer through a pipeline and then is discharged, the flue gas and heat conducting oil in the heat exchanger exchange heat, the heated heat conducting oil enters the evaporator through the pipeline to heat the water into steam, the flue gas further exchanges heat with the water in the economizer, and the heated water enters the gas-fired steam boiler. The utility model discloses the device produces the steam that does not take pressure through boiler and evaporimeter. More steam can be generated under the same energy consumption. The utility model discloses the device has increased a heat exchanger before the economizer, through the flue gas temperature greatly reduced that discharges behind twice heat transfer, and boiler efficiency improves.
Description
Technical Field
The utility model relates to a gas steam generator belongs to energy technical field.
Background
The gas boiler is a boiler using gas as fuel, and compared with a coal-fired boiler and an oil-fired boiler, the gas boiler is simple to install, small in occupied area and simple and convenient to operate. For small factories, gas-fired boilers are the first choice.
The gas steam boiler uses gas combustion to heat water in the boiler, so that the water is vaporized into steam. The water is heated in the boiler by the heat released by the combustion of the gases in the furnace to produce steam. The temperature of the pressurized steam generated by the gas boiler is generally higher than 100 c, since the boiling point of water increases with increasing pressure.
The flue gas in the gas boiler exchanges heat with water in the boiler and then is discharged, the temperature of the flue gas of a common gas boiler is about 180 ℃, and if the flue gas is directly discharged into air, great waste can be caused. At present, the flue gas discharged by a boiler passes through an economizer, exchanges heat with inlet water in the boiler in the economizer, preheats the inlet water of the boiler, and then is discharged. The economizer enables the flue gas to be fully cooled, reduces the temperature of the discharged flue gas, improves the efficiency of the boiler and saves fuel. The economizer is originally derived from a coal-fired boiler and is also conventionally called an economizer for similar devices of other fuel boilers.
In rice processing plants, steam is typically used to dry the grain. If the steam is pressurized and the temperature is too high, the grains can be roasted, the nutritional value of the rice is damaged, and therefore, the steam with no pressure needs to be generated in a rice processing factory.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a gas steam generator is provided. The device can generate steam without pressure suitable for the rice processing plant, and has high waste heat recovery efficiency and energy conservation.
A gas steam generating device comprises a gas steam boiler, a heat exchanger, an economizer and an evaporator, wherein water and combustible gas are input into the gas steam boiler, the water is heated to form steam, flue gas generated after the combustible gas is combusted sequentially passes through the heat exchanger and the economizer through pipelines and then is discharged, the flue gas and heat conduction oil in the heat exchanger exchange heat, the heated heat conduction oil enters the evaporator through the pipelines to heat the water into steam, the flue gas further exchanges heat with the water in the economizer, and the heated water enters the gas steam boiler.
In the gas steam boiler, natural gas is input, and the temperature of the exhausted flue gas is about 150-180 ℃. If the temperature of the flue gas is too low, water and sulfur oxides in the flue gas are easy to condense into sulfuric acid, which causes acid corrosion to the boiler. When the flue gas temperature is 150-180 ℃, if the flue gas passes through an economizer to preheat the feed water of the boiler as in the prior art, the water can even be heated to boiling state. After further heating in the boiler, the pressure of the steam can easily reach around 2 atmospheres.
In the device, the flue gas of the gas steam boiler firstly passes through the heat exchanger and then enters the economizer to preheat the feed water of the boiler. In the heat exchanger, most of the heat of the flue gas is exchanged for heat-conducting oil. The boiling point of the heat conduction oil is higher than that of water, and the heat conduction oil enters the evaporator to heat the water into steam. The utility model discloses the device produces the steam that does not take pressure through boiler and evaporimeter. More steam can be generated under the same energy consumption.
Further, the heat exchanger is a tube-and-shell heat exchanger.
In the shell-and-tube heat exchanger, the flow directions of the heat conduction oil and the flue gas are opposite, so that the heat exchange efficiency is improved.
In the economizer, the flow directions of smoke and water are opposite, so that the heat exchange efficiency is improved.
The beneficial effects of the utility model reside in that can fully retrieve the waste heat in the boiler flue gas still. If the boiler flue gas is directly discharged through the economizer, the flue gas finally discharged still has a higher temperature. The utility model discloses the device has increased a heat exchanger before the economizer, through the flue gas temperature greatly reduced who discharges behind twice heat transfer. The utility model discloses the device is when increasing steam output, has also improved energy efficiency, has reduced the influence to the environment.
Drawings
FIG. 1 is a schematic structural view of a gas steam generator, in which 1 is a gas steam boiler, 2 is a heat exchanger, 3 is an economizer, and 4 is an evaporator.
Detailed Description
As shown in fig. 1, a gas steam generator includes a gas steam boiler 1, a heat exchanger 2, an economizer 3 and an evaporator 4, the gas steam boiler 1 inputs water and combustible gas, the water is heated to form steam, the flue gas after the combustible gas is combusted passes through the heat exchanger 2 and the economizer 3 in sequence through a pipeline and then is discharged, the flue gas in the heat exchanger 2 exchanges heat with heat-conducting oil, the heated heat-conducting oil enters the evaporator 4 through a pipeline to heat the water into steam, the flue gas in the economizer 3 further exchanges heat with the water, and the heated water enters the gas steam boiler 1.
In the device, the flue gas of the gas steam boiler firstly passes through the heat exchanger 2 and then enters the economizer 3 to preheat the inlet water of the boiler. In the heat exchanger 3, most of the heat of the flue gas is exchanged for the heat conducting oil. By utilizing the fact that the boiling point of the heat conduction oil is higher than that of water, the heat conduction oil enters the evaporator 3, and the water is heated into steam, namely, the evaporation area is increased. The utility model discloses the device produces the steam that does not take pressure through boiler and evaporimeter. More steam can be generated under the same energy consumption.
If the boiler flue gas is directly discharged through the economizer, the flue gas finally discharged still has a higher temperature. The utility model discloses the device has increased a heat exchanger before the economizer, through the flue gas temperature greatly reduced who discharges behind twice heat transfer. The utility model discloses the device is when increasing steam output, has also improved energy efficiency, has reduced the influence to the environment.
Claims (4)
1. The gas steam generating device is characterized by comprising a gas steam boiler, a heat exchanger, an economizer and an evaporator, wherein water and combustible gas are input into the gas steam boiler, the water is heated to form steam, the flue gas generated after the combustion of the combustible gas sequentially passes through the heat exchanger and the economizer through pipelines and then is discharged, the flue gas and heat-conducting oil in the heat exchanger exchange heat, the heated heat-conducting oil enters the evaporator through the pipelines to heat the water into steam, the flue gas further exchanges heat with the water in the economizer, and the heated water enters the gas steam boiler.
2. The gas steam generator as set forth in claim 1, wherein said heat exchanger is a shell and tube heat exchanger.
3. The gas steam generator as claimed in claim 2, wherein the heat transfer oil and the flue gas flow in opposite directions in the shell-and-tube heat exchanger.
4. The gas steam generator as claimed in claim 1 or 2, wherein the flow direction of the flue gas and the water in the economizer is reversed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362673.6U CN210511611U (en) | 2019-08-21 | 2019-08-21 | Gas steam generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362673.6U CN210511611U (en) | 2019-08-21 | 2019-08-21 | Gas steam generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210511611U true CN210511611U (en) | 2020-05-12 |
Family
ID=70590710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921362673.6U Expired - Fee Related CN210511611U (en) | 2019-08-21 | 2019-08-21 | Gas steam generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210511611U (en) |
-
2019
- 2019-08-21 CN CN201921362673.6U patent/CN210511611U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 Termination date: 20210821 |