CN216115513U - Nitrogen heating device at top of analysis tower - Google Patents
Nitrogen heating device at top of analysis tower Download PDFInfo
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- CN216115513U CN216115513U CN202121132817.6U CN202121132817U CN216115513U CN 216115513 U CN216115513 U CN 216115513U CN 202121132817 U CN202121132817 U CN 202121132817U CN 216115513 U CN216115513 U CN 216115513U
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Abstract
The utility model discloses a nitrogen heating device at the top of an analysis tower, which comprises a nitrogen pipeline, a hot flue gas outlet pipeline, a tube heat exchanger, a hot air regulating valve and a heat regenerative fan, wherein one end of the nitrogen pipeline is connected with a nitrogen source, the other end of the nitrogen pipeline is connected with a nitrogen inlet pipeline of a nitrogen inlet of the analysis tower through a tube pass of the tube heat exchanger, one end of the hot flue gas outlet pipeline is communicated with the atmosphere, and the other end of the hot flue gas outlet pipeline is connected with the hot air pipeline of the hot flue gas outlet of the analysis tower through a shell pass of the tube heat exchanger, the hot air regulating valve and the heat regenerative fan in sequence. The utility model utilizes the high-temperature hot air of 220-320 ℃ discharged from the outlet of the heating section of the desorption tower to heat the top nitrogen to obtain the high-temperature nitrogen with the temperature of more than 100 ℃, compared with the traditional nitrogen heating device, the device does not need a steam heat exchanger and an electric heater, reduces the consumption of steam and electric energy, and avoids the waste of energy.
Description
Technical Field
The utility model relates to an improved nitrogen heating device at the top of a desorption tower, and belongs to the technical field of waste gas purification equipment.
Background
The function of the desorption tower is to remove SO adsorbed by the activated carbon from the flue gas2And impurities, so that the activated carbon is activated again for recycling. The analysis tower is divided into 3 parts from top to bottom, namely a heating section, a degassing section and a cooling section. The heat required by the heating section of the desorption tower is provided by a heating furnace, and when the system is started, the natural gas is used for ignition and the long open fire state is kept. The mixed gas of natural gas and blast furnace gas is adopted for combustion, after the mixed gas is combusted in the heating furnace, hot flue gas enters the shell side of the desorption tower under the action of a regenerative fan, and the activated carbon is indirectly heated through a heat exchange tube and then discharged into the atmosphere. The activated carbon is heated to the desorption temperature (about 400-450 ℃) by a heating furnace in the tube pass of the desorption tower, and N is introduced2The active carbon is isolated from the air, and hot spots generated by the combustion of the active carbon are avoided. Keeping the active carbon in the degassing section of the desorption tower for more than 3 hours to ensure that SO is generated4 2-Conversion to SO2So as to separate H2SO4SO is desorbed from the activated carbon2With a protective gas N2Mixing to form a SO-rich mixture2The gas (SRG) is sent to an acid making system to prepare concentrated sulfuric acid after passing through a sulfur-rich fan in a degassing section. The degassed active carbon enters the adsorption tower again after being cooled by a cooling fan.
Typically requiring a top N of the resolution tower2The temperature is not lower than 100 ℃, and the nitrogen gas has the function of preventing air isolationBesides hot spots, the activated carbon at the feeding section at the top of the desorption tower can be preheated and can be used as a carrier of SRG flue gas to bring the SRG flue gas out of the tower to prevent the SRG flue gas from being corroded by condensation at the heating section or the feeding section. At present, in the actual production process, nitrogen at the top of the desorption tower is heated by a steam heat exchanger and then is heated by an electric heater, and the heating mode consumes steam and electric energy, which is not beneficial to energy conservation and consumption reduction, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a nitrogen heating device at the top of an analytical tower aiming at the defects of the prior art so as to reduce the consumption of steam and electric energy and avoid the waste of energy.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an analytic tower top nitrogen gas heating device, includes nitrogen gas pipeline, hot exhanst gas outlet pipeline, shell and tube heat exchanger, hot air adjusting valve and backheat fan, the one end and the nitrogen gas source of nitrogen gas pipeline are connected, and the other end is connected with the nitrogen inlet pipeline of analytic tower nitrogen gas entry through the tube side of shell and tube heat exchanger, the one end and the atmosphere intercommunication of hot exhanst gas outlet pipeline, and the other end is connected with the hot air pipe way of analytic tower hot exhanst gas outlet through shell side, hot air adjusting valve and backheat fan of shell and tube heat exchanger in proper order.
The nitrogen heating device at the top of the analysis tower further comprises a nitrogen flow meter and a nitrogen pressure gauge, and the nitrogen flow meter and the nitrogen pressure gauge are arranged on a nitrogen inlet pipeline of a nitrogen inlet of the analysis tower.
And a pipe side hand valve is arranged on the nitrogen pipeline.
In the nitrogen heating device at the top of the desorption tower, a shell-side hand valve is arranged on a pipeline between the shell side of the shell-and-tube heat exchanger and the hot air regulating valve.
The utility model utilizes the high-temperature hot air of 220-320 ℃ discharged from the outlet of the heating section of the desorption tower to heat the top nitrogen to obtain the high-temperature nitrogen with the temperature of more than 100 ℃, compared with the traditional nitrogen heating device, the device does not need a steam heat exchanger and an electric heater, reduces the consumption of steam and electric energy, and avoids the waste of energy.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a nitrogen heating device at the top of a conventional desorption tower;
fig. 2 is a schematic structural diagram of the present invention.
The reference numbers in the figures are: 1. the system comprises a nitrogen pipeline, 2, a pipe side hand valve, 3, a tubular heat exchanger, 4, a shell side hand valve, 5, a hot air adjusting valve, 6, a heat return fan, 7, a hot air pipeline, 8, a hot flue gas outlet pipeline, 9, a nitrogen inlet pipeline, 10, a nitrogen flow meter, 11, a nitrogen pressure gauge, 12, a cold air fan, 13, a heating furnace, 14, a sulfur-rich fan, 15, a desorption tower, 16, a steam heat exchanger, 17 and an electric heater.
Detailed Description
The utility model provides an improved nitrogen heating device at the top of an analytic tower, which heats nitrogen at the top by utilizing high-temperature hot air at 220-320 ℃ at an outlet of a heating section of the analytic tower to obtain the high-temperature nitrogen at the temperature of more than 100 ℃, reduces the consumption of steam and electric energy and avoids the waste of energy.
Referring to fig. 2, the utility model mainly comprises a nitrogen pipeline 1, a tube side hand valve 2, a tube heat exchanger 3, a shell side hand valve 4, a hot air regulating valve 5, a regenerative fan 6, a hot flue gas outlet pipeline 8 and a nitrogen flow meter 10, wherein an internal gas channel of the tube heat exchanger 3 is divided into a tube side and a shell side, nitrogen is used in the tube side, and hot flue gas is used in the shell side. The hot air regulating valve 5 can regulate the air volume of hot flue gas entering the tubular heat exchanger 3, and the tube side hand valve 2 and the shell side hand valve 4 can regulate the air volume entering the tube side and the shell side of the tubular heat exchanger 3. Nitrogen enters a shell side of a shell-and-tube heat exchanger 3 through a nitrogen pipeline 1 and a tube side hand valve 2, is heated and then enters an analytical tower 15, hot flue gas is pumped into a hot flue gas outlet pipeline 8 through a regenerative fan 6, the flow is regulated through a hot air regulating valve 5, then the hot flue gas enters the shell side of the shell-and-tube heat exchanger 3, and is discharged to the atmosphere after heat exchange and temperature reduction.
The utility model provides a more energy-saving nitrogen heating device for the desorption tower by heating nitrogen at the top of the desorption tower through high-temperature hot air at 220-320 ℃ at the outlet of the heating section of the desorption tower 15 and by using the tubular heat exchanger 3, and the device does not use the steam heat exchanger 16 and the electric heater 17 in the figure 1 to heat the nitrogen any more. In addition, the high-temperature nitrogen can reduce the temperature difference between the high-temperature nitrogen and the analyzed sulfur dioxide, reduce condensation corrosion, facilitate preheating of the activated carbon at the feeding section and reduce consumption of blast furnace gas and natural gas of a heating furnace of the analyzing tower.
Claims (4)
1. The utility model provides an analysis top of tower nitrogen gas heating device, characterized by, includes nitrogen gas pipeline (1), hot exhanst gas outlet pipeline (8), shell and tube heat exchanger (3), hot air adjusting valve (5) and backheat fan 6, the one end and the nitrogen gas source of nitrogen gas pipeline (1) are connected, and the other end is connected with nitrogen inlet pipeline (9) of analysis tower (15) nitrogen gas entry through the tube side of shell and tube heat exchanger (3), the one end and the atmosphere intercommunication of hot exhanst gas outlet pipeline (8), and the other end is connected with analysis tower (15) hot air duct (7) of hot exhanst gas outlet through shell side, hot air adjusting valve (5) and backheat fan 6 of shell and tube heat exchanger (3) in proper order.
2. The nitrogen heating device for the top of the desorption tower as claimed in claim 1, further comprising a nitrogen flow meter (10) and a nitrogen pressure gauge (11), wherein the nitrogen flow meter (10) and the nitrogen pressure gauge (11) are arranged on a nitrogen inlet pipe (9) of a nitrogen inlet of the desorption tower (15).
3. The nitrogen heating device for the top of the desorption tower as claimed in claim 1 or 2, wherein the nitrogen pipeline (1) is provided with a pipe-side hand valve (2).
4. The nitrogen heating device at the top of the desorption tower as claimed in claim 3, wherein a shell-side hand valve (4) is arranged on a pipeline between the shell side of the tubular heat exchanger (3) and the hot air regulating valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121132817.6U CN216115513U (en) | 2021-05-25 | 2021-05-25 | Nitrogen heating device at top of analysis tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121132817.6U CN216115513U (en) | 2021-05-25 | 2021-05-25 | Nitrogen heating device at top of analysis tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216115513U true CN216115513U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121132817.6U Active CN216115513U (en) | 2021-05-25 | 2021-05-25 | Nitrogen heating device at top of analysis tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216115513U (en) |
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2021
- 2021-05-25 CN CN202121132817.6U patent/CN216115513U/en active Active
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