CN216557198U - System nitrogen machine oxygen containing tail gas recovery system - Google Patents
System nitrogen machine oxygen containing tail gas recovery system Download PDFInfo
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- CN216557198U CN216557198U CN202123386766.2U CN202123386766U CN216557198U CN 216557198 U CN216557198 U CN 216557198U CN 202123386766 U CN202123386766 U CN 202123386766U CN 216557198 U CN216557198 U CN 216557198U
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- tail gas
- heat exchange
- containing tail
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses an oxygen-containing tail gas recovery system of a nitrogen making machine, wherein an oxygen-containing tail gas outlet of the nitrogen making machine is connected with an air inlet of a pressure stabilizing tank, an air outlet of the pressure stabilizing tank is respectively connected with one end of an emptying pipe and one end of an oxygen-containing tail gas recovery pipe, and the other end of the oxygen-containing tail gas recovery pipe is connected with a combustion air inlet of a boiler; a heat exchange coil is fixed in the drying material pipe, two pipe orifices of the heat exchange coil are respectively connected with one ends of the first air supply pipe and the second air supply pipe, and the other ends of the first air supply pipe and the second air supply pipe are both connected with the oxygen-containing tail gas recovery pipe. After winter comes, the oxygen-containing waste gas in the pressure stabilizing tank is sent to the heat exchange coil, the hot air sent into the drying material pipe and the heating heat exchange coil heat the oxygen-containing waste gas in the heat exchange coil, the temperature of the oxygen-containing waste gas is improved, the oxygen-containing waste gas is sent into the boiler furnace, the temperature of the gas sent into the boiler furnace is improved, the influence of the low-temperature oxygen-containing tail gas on the temperature of a local area in the low-boiler furnace is avoided, and the thermal efficiency of the boiler is guaranteed.
Description
The technical field is as follows:
the utility model relates to the field of sodium metal production, in particular to a nitrogen making machine oxygen-containing tail gas recovery system.
The background art comprises the following steps:
in the production process of the metal sodium, after the liquid sodium is cooled and formed into a sodium rod by a sodium casting machine, the packaging process needs to use nitrogen to reduce the oxidation of the metal sodium, and the nitrogen is generated by a nitrogen making machine, the raw material for generating the nitrogen is air, and the air contains oxygen with the highest content except the nitrogen, so that the tail gas of the nitrogen making machine contains oxygen with the content exceeding the air content. In order to reasonably utilize resources, the air with higher oxygen content is sent to a boiler to be used as combustion-supporting air at present, so that the fuel in the boiler is ensured to be fully combusted, the main function of the boiler is to heat the air to be used for drying the raw material sodium chloride, but the air is required to be dewatered by a cooling dryer before being sent to a nitrogen making machine, so that the temperature of the air entering the nitrogen making machine is lower, the temperature of the discharged nitrogen and the temperature of the oxygen-containing tail gas are lower, particularly in winter, the temperature of a local area in the boiler can be reduced when the air is directly sent to the boiler, and the thermal efficiency of the boiler is influenced.
The utility model has the following contents:
the utility model aims to provide an oxygen-containing tail gas recovery system of a nitrogen making machine.
The utility model is implemented by the following technical scheme:
the system comprises a boiler, a drying material pipe and a sodium chloride hopper, wherein a hot air outlet of the boiler is connected with an air inlet of the drying material pipe, a feed inlet of the drying material pipe is connected with a discharge outlet of the sodium chloride hopper, the system also comprises a nitrogen making machine, a pressure stabilizing tank and a heat exchange coil, an oxygen-containing tail gas outlet of the nitrogen making machine is connected with an air inlet of the pressure stabilizing tank, an air outlet of the pressure stabilizing tank is respectively connected with one end of an emptying pipe and one end of an oxygen-containing tail gas recovery pipe, and the other end of the oxygen-containing tail gas recovery pipe is connected with a combustion-supporting air inlet of the boiler;
a heat exchange coil is fixed in the drying material pipe, two pipe orifices of the heat exchange coil are respectively connected with one ends of a first air supply pipe and a second air supply pipe, and the other ends of the first air supply pipe and the second air supply pipe are both connected with the oxygen-containing tail gas recovery pipe; the oxygen-containing tail gas recovery pipe between the first air supply pipe and the second air supply pipe is provided with a first cut-off valve, the first air supply pipe is provided with a second cut-off valve, and the second air supply pipe is provided with a third cut-off valve.
Preferably, the heat exchange coil comprises a plurality of heat exchange branch pipes arranged in parallel, the heat exchange branch pipes are adjacent to each other in an end-to-end manner, and a plurality of distribution plates are fixed between the adjacent heat exchange branch pipes.
Preferably, the edge of the heat exchange coil is fixed on the inner wall of the drying material pipe through a connecting rod.
The utility model has the advantages that: after winter comes, the oxygen-containing waste gas in the pressure stabilizing tank is sent to the heat exchange coil pipe through the first air supply pipe, the hot air and the heating heat exchange coil pipe sent into in the drying material pipe heat the oxygen-containing waste gas in the heat exchange coil pipe, the temperature of the oxygen-containing waste gas is improved, the hot air is sent into the boiler furnace through the second air supply pipe and the oxygen-containing tail gas recovery pipe, the temperature of the gas sent into the boiler furnace is improved, the influence of directly injecting low-temperature oxygen-containing tail gas on the local area temperature in the low-boiler furnace is avoided, and the thermal efficiency of the boiler is guaranteed.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of a drying tube;
fig. 3 is a schematic diagram of a heat exchange coil.
In the figure: boiler 1, dry material pipe 2, sodium chloride hopper 3, nitrogen generator 4, surge tank 5, heat transfer coil 6, heat transfer branch pipe 6.1, evacuation pipe 7, oxygen-containing tail gas recovery pipe 8, first blast pipe 9, second blast pipe 10, first shut-off valve 11, second shut-off valve 12, third shut-off valve 13, distributing plate 14, connecting rod 15.
The specific implementation mode is as follows:
as shown in fig. 1 to 3, an oxygen-containing tail gas recovery system of a nitrogen generator comprises a boiler 1, a drying material pipe 2 and a sodium chloride hopper 3, wherein a hot air outlet of the boiler 1 is connected with an air inlet of the drying material pipe 2, a feed inlet of the drying material pipe 2 is connected with a discharge outlet of the sodium chloride hopper 3, the system further comprises a nitrogen generator 4, a pressure stabilizing tank 5 and a heat exchange coil 6, an oxygen-containing tail gas outlet of the nitrogen generator 4 is connected with an air inlet of the pressure stabilizing tank 5, an air outlet of the pressure stabilizing tank 5 is respectively connected with one end of an emptying pipe 7 and one end of an oxygen-containing tail gas recovery pipe 8, and the other end of the oxygen-containing tail gas recovery pipe 8 is connected with a combustion air inlet of the boiler 1;
a heat exchange coil 6 is fixed in the drying material pipe 2, two pipe orifices of the heat exchange coil 6 are respectively connected with one ends of a first air supply pipe 9 and a second air supply pipe 10, and the other ends of the first air supply pipe 9 and the second air supply pipe 10 are both connected with an oxygen-containing tail gas recovery pipe 8; a first cut valve 11 is installed on the oxygen-containing tail gas recovery pipe 8 between the first air supply pipe 9 and the second air supply pipe 10, a second cut valve 12 is installed on the first air supply pipe 9, and a third cut valve 13 is installed on the second air supply pipe 10;
when the nitrogen making machine 4 works in summer, air is sent into the nitrogen making machine 4, the made nitrogen is sent to a packaging workshop, oxygen-containing waste gas is sent into the pressure stabilizing tank 5 for temporary storage, and then is sent into a hearth of the boiler 1 through the oxygen-containing tail gas recycling pipe 8, so that sufficient oxygen is provided for natural gas combustion; air is sent into an air duct of a boiler 1 from an air inlet of the boiler 1, natural gas is combusted in a hearth of the boiler 1 to heat the air in the air duct, hot air is sent into a drying material pipe 2, sodium chloride in a sodium chloride hopper 3 falls into the drying pipe from the sodium chloride hopper 3, the hot air is directly contacted with the sodium chloride to heat and dry the sodium chloride, the dried sodium chloride is sent out from the bottom, and the hot air is sent to a cyclone dust collector to be further separated;
after winter comes, the third cut-off valve 13 is closed, the first cut-off valve 11 and the second cut-off valve 12 are opened, oxygen-containing waste gas in the pressure stabilizing tank 5 is sent into the heat exchange coil 6 through the first air supply pipe 9, hot air sent into the drying material pipe 2 heats the heat exchange coil 6 to heat the oxygen-containing waste gas in the heat exchange coil 6, the temperature of the oxygen-containing waste gas is increased, the oxygen-containing waste gas is sent into a hearth of the boiler 1 through the second air supply pipe 10 and the oxygen-containing tail gas recovery pipe 8, the temperature of gas sent into the hearth of the boiler 1 is increased, the influence of directly injecting low-temperature oxygen-containing tail gas on the temperature of a local area in the hearth of the boiler 1 is avoided, and the thermal efficiency of the boiler 1 is ensured;
meanwhile, by arranging the emptying pipe 7, the valve of the emptying pipe 7 can be opened to directly empty the oxygen-containing waste gas when the oxygen-containing waste gas is not required to be recycled.
The heat exchange coil 6 comprises a plurality of heat exchange branch pipes 6.1 which are arranged in parallel, the adjacent heat exchange branch pipes 6.1 are connected end to end, and a plurality of distribution plates 14 are fixed between the adjacent heat exchange branch pipes 6.1; through setting up distribution plate 14, when the hot-air passes through the heat transfer dish, separated by distribution plate 14, the hot-air can only pass through in the gap, realizes the effect of equipartition hot-air, ensures that sodium chloride is fully dry.
The edge of heat exchange coil 6 is fixed in on the 2 inner walls of dry material pipe through connecting rod 15, strengthens heat exchange coil 6's fixed, avoids heat exchange coil 6 to take place to empty.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. The oxygen-containing tail gas recovery system of the nitrogen making machine comprises a boiler, a drying material pipe and a sodium chloride hopper, wherein a hot air outlet of the boiler is connected with an air inlet of the drying material pipe, a feed inlet of the drying material pipe is connected with a discharge outlet of the sodium chloride hopper, and the oxygen-containing tail gas recovery system is characterized by further comprising the nitrogen making machine, a pressure stabilizing tank and a heat exchange coil, wherein an oxygen-containing tail gas outlet of the nitrogen making machine is connected with an air inlet of the pressure stabilizing tank, an air outlet of the pressure stabilizing tank is respectively connected with one end of an emptying pipe and one end of an oxygen-containing tail gas recovery pipe, and the other end of the oxygen-containing tail gas recovery pipe is connected with a combustion-supporting air inlet of the boiler;
a heat exchange coil is fixed in the drying material pipe, two pipe orifices of the heat exchange coil are respectively connected with one ends of a first air supply pipe and a second air supply pipe, and the other ends of the first air supply pipe and the second air supply pipe are both connected with the oxygen-containing tail gas recovery pipe; the oxygen-containing tail gas recovery pipe between the first air supply pipe and the second air supply pipe is provided with a first cut-off valve, the first air supply pipe is provided with a second cut-off valve, and the second air supply pipe is provided with a third cut-off valve.
2. The oxygen-containing tail gas recovery system of a nitrogen generator according to claim 1, wherein the heat exchange coil comprises a plurality of parallel heat exchange branch pipes, the adjacent heat exchange branch pipes are connected end to end, and a plurality of distribution plates are fixed between the adjacent heat exchange branch pipes.
3. The oxygen-containing tail gas recovery system of the nitrogen generator as claimed in claim 1 or 2, wherein the edges of the heat exchange coil are fixed on the inner wall of the drying material pipe through connecting rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386766.2U CN216557198U (en) | 2021-12-29 | 2021-12-29 | System nitrogen machine oxygen containing tail gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386766.2U CN216557198U (en) | 2021-12-29 | 2021-12-29 | System nitrogen machine oxygen containing tail gas recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216557198U true CN216557198U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123386766.2U Active CN216557198U (en) | 2021-12-29 | 2021-12-29 | System nitrogen machine oxygen containing tail gas recovery system |
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| Country | Link |
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| CN (1) | CN216557198U (en) |
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2021
- 2021-12-29 CN CN202123386766.2U patent/CN216557198U/en active Active
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