CN219160929U - Nitrogen atmosphere kiln with tar collection function through gas heating - Google Patents
Nitrogen atmosphere kiln with tar collection function through gas heating Download PDFInfo
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- CN219160929U CN219160929U CN202223059726.1U CN202223059726U CN219160929U CN 219160929 U CN219160929 U CN 219160929U CN 202223059726 U CN202223059726 U CN 202223059726U CN 219160929 U CN219160929 U CN 219160929U
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Abstract
The utility model relates to a nitrogen atmosphere kiln with tar collection by gas heating, which comprises a kiln body, a high-temperature nitrogen inlet, a low-temperature nitrogen outlet, a nitrogen circulating heater, a nitrogen return pipe, a high-temperature nitrogen pipe, a return nitrogen tar collector, a gas burner and a combustion-supporting fan, wherein the kiln body is provided with a gas inlet and a gas outlet; a heating section, a firing section and a cooling section are sequentially arranged in the kiln body, a high-temperature nitrogen inlet is positioned in the firing section of the kiln body, and a low-temperature nitrogen outlet is positioned in the heating section of the kiln body; the nitrogen heater comprises a nitrogen circulating fan, a heat exchanger and a combustion hearth, and the reflux nitrogen tar collector is arranged on a nitrogen reflux pipe between the low-temperature nitrogen outlet and the nitrogen circulating fan; the gas burner and the combustion-supporting fan are arranged beside the combustion hearth. The method has the advantages that the oxidation effect generated by directly acting the oxygen-containing flue gas on the calcine is avoided; and the cost is reduced.
Description
Technical Field
The utility model relates to a nitrogen atmosphere kiln body, in particular to a nitrogen atmosphere kiln body capable of removing tar outside the kiln, and belongs to the technical field of new energy technology and kiln body manufacturing.
Background
The electrode material of the lithium battery needs to take nitrogen atmosphere protection measures when being calcined, the calcined material can not be directly heated by flame hot gas of a burner to cause oxidation of the calcined material, and the electric heating adopted at present can increase the production energy consumption cost due to higher electricity price, so that the production influence on electricity-shortage areas and electricity-shortage enterprises is larger; in addition, the electrode material of the lithium battery volatilizes a large amount of tar in the calcining and heating process, the tar can be intensively adhered to the kiln cavity and the electrothermal silicon carbon rod in a low-temperature area, carbon elements contained in the tar have conductivity, so that the electrothermal rod in the kiln cavity is often short-circuited, and structural materials of the kiln body are also damaged by electric shock; at present, the treatment of accumulated tar in the kiln body can only be stopped periodically and cleaned through an empty kiln cavity, so that great energy waste and production stopping loss are caused.
At present, high-temperature flue gas or high-temperature nitrogen is adopted as a heat transfer medium, a kiln cavity is heated by radiation through a heat radiation pipe, the problem that a kiln body structure is damaged by electric shock caused by conductive sediments is solved by adopting a non-electrothermal heating method, but the exhaust emission is greatly reduced by adopting a sealed calcination process protected by nitrogen atmosphere, a large amount of tar volatile matters cannot be brought out through exhaust gas and accumulated in the kiln cavity, the heat transfer efficiency of the heat radiation pipe is seriously affected when the tar sediments are excessively accumulated on the surface area of the heat radiation pipe, and the tar sediments need to be cleaned at intervals, so that the production is affected.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a nitrogen atmosphere kiln with tar collection by gas heating, which utilizes heat generated by a gas burner to heat nitrogen in an isolated way through a heat exchanger, then sends high-temperature nitrogen into a kiln body to circularly heat calcined substances, utilizes reflux nitrogen to take tar volatile matters in a kiln cavity out of the kiln for collection and cleaning, and reduces accumulation of tar sediment in the kiln.
In order to achieve the above purpose, the technical scheme of the utility model is realized by a gas heating nitrogen atmosphere kiln with tar collection, which is characterized by comprising the following steps:
the kiln body, the high-temperature nitrogen inlet and the low-temperature nitrogen outlet; the kiln body is sequentially provided with a heating section, a firing section and a cooling section, the high-temperature nitrogen inlet is positioned at the firing section of the kiln body, and the low-temperature nitrogen outlet is positioned at the heating section of the kiln body;
a nitrogen circulating heater, a nitrogen return pipe and a high-temperature nitrogen pipe; the nitrogen circulation heater comprises a nitrogen circulation fan, a heat exchanger and a combustion hearth, wherein a nitrogen flow channel and a flue gas flow channel are arranged in the heat exchanger, the combustion hearth is communicated with a flue gas inlet of a flue gas flow channel of the heat exchanger, a flue gas outlet of the flue gas flow channel of the heat exchanger is communicated with the outside, a nitrogen inlet of the nitrogen flow channel of the heat exchanger is communicated with an air outlet of the nitrogen circulation fan, a low-temperature nitrogen outlet is communicated with an air inlet of the nitrogen circulation fan through a nitrogen return pipe, and a nitrogen outlet of the nitrogen flow channel of the heat exchanger is communicated with a high-temperature nitrogen inlet through a high-temperature nitrogen pipe;
reflux nitrogen tar collector; the reflux nitrogen tar collector is arranged on a nitrogen reflux pipe between the low-temperature nitrogen outlet and the nitrogen circulating fan;
a gas burner and a combustion fan; the gas burner and the combustion-supporting fan are arranged beside the combustion hearth, the combustion-supporting fan is arranged beside the gas burner so as to support the gas burner, and a flame port of the gas burner is arranged in the combustion hearth; and
the waste gas tar collector is arranged on a pipeline between the waste gas outlet and a combustion fan of the gas burner.
In the technical scheme, the heat exchanger is a shell-and-tube heat exchanger or a plate heat exchanger;
in the technical scheme, the nitrogen circulating fan is a variable frequency fan.
In the technical scheme, the reflux nitrogen tar collector and the waste gas tar collector can be surface coolers taking circulating water or air as refrigerants, and are provided with cover plates so as to conveniently clean tar sediments inside.
In the technical scheme, the pair of reflux nitrogen and tar collectors is provided with a first valve at an inlet and an outlet of the reflux nitrogen and tar collectors, the pair of waste gas and tar collectors is provided with a second valve at an inlet and an outlet of the waste gas and tar collectors.
In the technical scheme, a nitrogen injection branch pipe is arranged on a nitrogen reflux pipe at the inlet end of the nitrogen circulating fan so as to continuously inject nitrogen, so that the kiln cavity and related pipelines are micro-positive pressure to resist the entry of external air.
In the technical scheme, a plurality of electric heating rods are arranged in a firing section of the inner cavity of the kiln body.
Compared with the prior art, the utility model has the advantages that: the kiln cavity is heated by high-temperature nitrogen which is heated in a gas isolation and circulation way, so that the oxidation effect generated by directly acting oxygen-containing flue gas on the calcine can be avoided; the heated high-temperature nitrogen is continuously injected into the kiln cavity through the pipeline, so that the kiln cavity is positive-pressure to resist the entry of external air, the entry of the high-temperature nitrogen can not disturb the temperature field in the kiln cavity, the heating of the nitrogen by utilizing natural gas can greatly reduce electric heating supplement and save energy consumption cost, and meanwhile, the heavy work caused by the fact that a large number of electric heating rods or heat radiation pipes are arranged in the kiln cavity in the prior art is greatly reduced, the cost is further reduced, and the furnace shutdown maintenance work caused by the fact that the heat radiation pipes are damaged due to the impact or stress of materials in the prior art is also avoided; the nitrogen is used as a heat transfer medium, and simultaneously brings out a large amount of tar volatile matters generated in the kiln cavity in the circulation process, and the tar volatile matters are collected and cleaned by utilizing a condenser arranged outside the kiln, so that tar sediment accumulation in the kiln is greatly reduced. The tar volatile matters are condensed and collected through the waste gas tar collector, so that the pollution components in waste gas can be reduced, and the pollution of tar to subsequent pipelines and equipment is also reduced.
Drawings
FIG. 1 is a schematic front view of embodiment 1 of the present utility model;
FIG. 2 is a schematic side view of embodiment 1 of the present utility model;
FIG. 3 is a schematic top view of embodiment 1 of the present utility model;
FIG. 4 is a schematic front view of embodiment 2 of the present utility model;
FIG. 5 is a schematic top view of embodiment 2 of the present utility model;
FIG. 6 is a schematic front view of embodiment 3 of the present utility model;
fig. 7 is a schematic top view of embodiment 3 of the present utility model.
Description of the embodiments
The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
In the description of the present utility model, the azimuth or positional relationship indicated by the terms "upper" and "lower" and the like are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and do not require that the present utility model must be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
Examples
As shown in fig. 1, 2 and 3, the kiln is a nitrogen atmosphere kiln with tar collection by gas heating, and is characterized by comprising:
kiln body 1, high temperature nitrogen inlet 2 and low temperature nitrogen outlet 3; a heating section 11, a firing section 12 and a cooling section 13 are sequentially arranged in the kiln body 1, the high-temperature nitrogen inlet 2 is positioned in the firing section 12 of the kiln body 1, and the low-temperature nitrogen outlet 3 is positioned in the heating section 11 of the kiln body 1;
a nitrogen circulation heater 4, a nitrogen return pipe 61, and a high-temperature nitrogen pipe 62; the nitrogen circulation heater 4 comprises a nitrogen circulation fan 48, a heat exchanger 40 and a combustion hearth 45, wherein the heat exchanger 40 is internally provided with a nitrogen flow passage 42 and a flue gas flow passage 46, the combustion hearth 45 is communicated with a flue gas inlet of the flue gas flow passage 46 of the heat exchanger 40, a flue gas outlet 47 of the flue gas flow passage 46 of the heat exchanger 40 is communicated with the outside, a nitrogen inlet 41 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with an air outlet of the nitrogen circulation fan 48, the low-temperature nitrogen outlet 3 is communicated with an air inlet of the nitrogen circulation fan 48 through a nitrogen return pipe 61, and a nitrogen outlet 43 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with the high-temperature nitrogen inlet 2 through a high-temperature nitrogen pipe 62;
a reflux nitrogen tar collector 6; the reflux nitrogen tar collector 6 is arranged on a nitrogen reflux pipe 61 between the low-temperature nitrogen outlet 3 and the nitrogen circulating fan 48; and
a gas burner 44 and a combustion fan 5; the gas burner 44 and the combustion fan 5 are arranged beside the combustion hearth 45, the combustion fan 5 is arranged beside the gas burner 44 so as to support the gas burner 44, and a flame port of the gas burner 44 is arranged in the combustion hearth 45.
In the present embodiment, the heat exchanger 40 is a shell-and-tube heat exchanger, the tube side flow path of the heat exchanger 40 is used as the flue gas flow path 46, and the shell side flow path of the heat exchanger 40 is used as the nitrogen flow path 42.
In this embodiment, the nitrogen gas circulation fan 48 is a variable frequency fan.
In the technical scheme, the device also comprises an exhaust gas tar collector 7; the kiln top of the heating section 11 of the kiln body 1 is provided with an exhaust gas outlet 14, the exhaust gas outlet 14 is arranged at the kiln top of the heating section 11 of the kiln body 1, the exhaust gas outlet 14 is communicated with the combustion fan 5, and the exhaust gas tar collector 7 is arranged on a pipeline between the exhaust gas outlet 14 and the combustion fan 5 of the gas burner 44.
In the technical scheme, the reflux nitrogen tar collector 6 and the waste gas tar collector 7 are surface coolers taking water or air as a refrigerant, and are used for condensing tar volatile matters in gas from gas state or mist state into liquid state and collecting the tar volatile matters, and the reflux nitrogen tar collector 6 and the waste gas tar collector 7 are provided with cover plates so as to conveniently clean tar sediments inside.
In the technical scheme, the pair of the reflux nitrogen and tar collectors 6 is provided, the inlet and outlet of the reflux nitrogen and tar collector 6 are respectively provided with a first valve 60, the pair of the waste gas and tar collectors 7 is provided, and the inlet and outlet of the waste gas and tar collector 7 are respectively provided with a second valve 70. When the device is used, the reflux nitrogen gas tar collector 6 and the waste gas tar collector 7 can enable one condenser to work and the other condenser to be cleaned and overhauled by switching the corresponding valves, so that the continuous production of the kiln body is not affected.
In the present technical solution, the nitrogen gas injection branch pipe 63 is provided on the nitrogen gas return pipe 61 at the inlet end of the nitrogen gas circulation fan 48, and continuously injects nitrogen gas to make the kiln chamber and the related pipes slightly positive pressure to resist the entry of external air.
In embodiment 1, nitrogen heated by the nitrogen circulation heater 4 is driven by the nitrogen circulation fan 48 to be sent into the kiln cavity through the high-temperature nitrogen inlet 2 to heat the calcinations, the temperature and flow of the nitrogen can be controlled by controlling the temperature of the combustion hearth 45 of the nitrogen circulation heater 4 and the frequency of the nitrogen circulation fan 48, the nitrogen after releasing heat enters the reflux nitrogen tar collector 6 connected with the nitrogen return pipe 61 from the low-temperature nitrogen outlet 3 to condense and separate out tar volatile matters in the nitrogen, the tar is prevented from entering a subsequent pipeline, the nitrogen circulation fan 48 and the nitrogen circulation heater 4 are blocked, and a user only needs to clean the tar adhered in the reflux nitrogen tar collector 6 regularly. The heated high-temperature nitrogen is continuously injected into the kiln cavity from the nitrogen supplementing pipeline 63, so that positive pressure is formed in the kiln cavity, oxidation of calcined substances caused by external air entering is avoided, and the high-temperature nitrogen cannot disturb a temperature field in the kiln cavity. The kiln body 1 is heated by adopting nitrogen as a heat transfer medium, the nitrogen released by heat can be circularly heated by nitrogen after flowing out from the low-temperature nitrogen outlet 3, and the nitrogen is prevented from mixing with oxygen-containing air when the nitrogen circulated heater 4 is heated, so that the heating measures of completely isolating the nitrogen from a hearth and flue gas thereof are needed, the heating requirements can be realized through the function of the tubular heat exchanger, and the tubular heat exchanger has the function of isolating and heat-exchanging the flue gas and the nitrogen, also has a larger heat-exchanging area to realize efficient heat exchange, and enables the heat of high-temperature flue gas to be transferred to the nitrogen in a large proportion to realize energy conservation.
Harmful gas generated in the heating section of the kiln body 1 is purified by removing tar through the waste gas tar collector 7 and then is introduced into the combustion furnace 45 for burning, tar volatile matters are condensed and collected through the waste gas tar collector 7, so that pollution components in waste gas can be reduced, pollution of tar to subsequent pipelines and equipment is also reduced, as the kiln body waste gas outlet 14 is connected with the combustion-supporting fan 5, pumping force is always generated as long as the combustion-supporting fan 5 always operates in the production process, and the condition that external air flows back into the kiln cavity from the waste gas outlet can not occur.
Examples
As shown in fig. 4 and 5, the furnace is a nitrogen atmosphere furnace with tar collection by gas heating, and is characterized by comprising:
kiln body 1, high temperature nitrogen inlet 2 and low temperature nitrogen outlet 3; a heating section 11, a firing section 12 and a cooling section 13 are sequentially arranged in the kiln body 1, the high-temperature nitrogen inlet 2 is positioned in the firing section 12 of the kiln body 1, and the low-temperature nitrogen outlet 3 is positioned in the heating section 11 of the kiln body 1;
a nitrogen circulation heater 4, a nitrogen return pipe 61, and a high-temperature nitrogen pipe 62; the nitrogen circulation heater 4 comprises a nitrogen circulation fan 48, a heat exchanger 40 and a combustion hearth 45, wherein the heat exchanger 40 is internally provided with a nitrogen flow passage 42 and a flue gas flow passage 46, the combustion hearth 45 is communicated with a flue gas inlet of the flue gas flow passage 46 of the heat exchanger 40, a flue gas outlet 47 of the flue gas flow passage 46 of the heat exchanger 40 is communicated with the outside, a nitrogen inlet 41 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with an air outlet of the nitrogen circulation fan 48, the low-temperature nitrogen outlet 3 is communicated with an air inlet of the nitrogen circulation fan 48 through a nitrogen return pipe 61, and a nitrogen outlet 43 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with the high-temperature nitrogen inlet 2 through a high-temperature nitrogen pipe 62;
a reflux nitrogen tar collector 6; the reflux nitrogen tar collector 6 is arranged on a nitrogen reflux pipe 61 between the low-temperature nitrogen outlet 3 and the nitrogen circulating fan 48; and
a gas burner 44 and a combustion fan 5; the gas burner 44 and the combustion fan 5 are arranged beside the combustion hearth 45, the combustion fan 5 is arranged beside the gas burner 44 so as to support the gas burner 44, and a flame port of the gas burner 44 is arranged in the combustion hearth 45.
In the present embodiment, the heat exchanger 40 is a shell-and-tube heat exchanger, the tube side flow path of the heat exchanger 40 is used as the flue gas flow path 46, and the shell side flow path of the heat exchanger 40 is used as the nitrogen flow path 42.
In this embodiment, the nitrogen gas circulation fan 48 is a variable frequency fan.
In the technical scheme, the device also comprises an exhaust gas tar collector 7; the kiln top of the heating section 11 of the kiln body 1 is provided with an exhaust gas outlet 14, the exhaust gas outlet 14 is arranged at the kiln top of the heating section 11 of the kiln body 1, the exhaust gas outlet 14 is communicated with the combustion fan 5, and the exhaust gas tar collector 7 is arranged on a pipeline between the exhaust gas outlet 14 and the combustion fan 5 of the gas burner 44.
In the technical scheme, the reflux nitrogen tar collector 6 and the waste gas tar collector 7 are surface coolers taking water or air as a refrigerant, and are used for condensing tar volatile matters in gas from gas state or mist state into liquid state and collecting the tar volatile matters, and the reflux nitrogen tar collector 6 and the waste gas tar collector 7 are provided with cover plates so as to conveniently clean tar sediments inside.
In the technical scheme, the pair of the reflux nitrogen and tar collectors 6 is provided, the inlet and outlet of the reflux nitrogen and tar collector 6 are respectively provided with a first valve 60, the pair of the waste gas and tar collectors 7 is provided, and the inlet and outlet of the waste gas and tar collector 7 are respectively provided with a second valve 70. When the device is used, the reflux nitrogen gas tar collector 6 and the waste gas tar collector 7 can enable one condenser to work and the other condenser to be cleaned and overhauled by switching the corresponding valves, so that the continuous production of the kiln body is not affected.
In the present technical solution, the nitrogen gas injection branch pipe 63 is provided on the nitrogen gas return pipe 61 at the inlet end of the nitrogen gas circulation fan 48, and continuously injects nitrogen gas to make the kiln chamber and the related pipes slightly positive pressure to resist the entry of external air.
In the technical scheme, a plurality of electric heating rods 8 are arranged in a firing section 12 of the inner cavity of the kiln body 1.
The main difference between example 2 and example 1 is that a plurality of electric heating rods 8 are arranged at the firing section of the kiln cavity, which is suitable for the requirements of the calcination process above 1000 ℃. Since a large amount of nitrogen oxides are generated when the combustion temperature of the combustion chamber 45 of the nitrogen recycle heater 4 is too high, and the cost of exhaust gas treatment is increased, the temperature of the combustion chamber 45 is controlled below 1100 ℃ in general, the combustion chamber is environment-friendly and economical, the temperature of nitrogen through shell-and-tube heat exchange is lower than the temperature of the combustion chamber 45, if a higher calcination temperature is required, the combustion chamber is realized by supplementing heat through the electric heating rod 8, and the accurate kiln chamber temperature control can be performed through the electric heating rod 8. The proportion of the heat supplemented by the electric heating rod 8 to the total heating energy consumption is low, and the influence on the energy consumption cost is small. In addition, the silicon carbide rod 8 only needs to be arranged in the kiln cavity firing section 12, and the high-temperature area is very little in corrosive gas and tar accumulation, so that the silicon carbide rod 8 is basically free from tar adhesion, and corrosion, short circuit and electric shock can not occur.
Because the dew point of tar is higher, the tar can be condensed and separated out and collected in a large proportion by the waste gas tar collector 7 adopting normal-temperature air as the refrigerant, and in the embodiment 2, the high-temperature air after condensation and heat exchange can be used as combustion air of the burner of the nitrogen circulating heater 4 by the waste gas tar collector 7 adopting air as the refrigerant, so that the fuel gas can be saved.
Examples
As shown in fig. 6 and 7, the furnace is a nitrogen atmosphere furnace with tar collection by gas heating, and is characterized by comprising:
kiln body 1, high temperature nitrogen inlet 2 and low temperature nitrogen outlet 3; a heating section 11, a firing section 12 and a cooling section 13 are sequentially arranged in the kiln body 1, the high-temperature nitrogen inlet 2 is positioned in the firing section 12 of the kiln body 1, and the low-temperature nitrogen outlet 3 is positioned in the heating section 11 of the kiln body 1;
a nitrogen circulation heater 4, a nitrogen return pipe 61, and a high-temperature nitrogen pipe 62; the nitrogen circulation heater 4 comprises a nitrogen circulation fan 48, a heat exchanger 40 and a combustion hearth 45, wherein the heat exchanger 40 is internally provided with a nitrogen flow passage 42 and a flue gas flow passage 46, the combustion hearth 45 is communicated with a flue gas inlet of the flue gas flow passage 46 of the heat exchanger 40, a flue gas outlet 47 of the flue gas flow passage 46 of the heat exchanger 40 is communicated with the outside, a nitrogen inlet 41 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with an air outlet of the nitrogen circulation fan 48, the low-temperature nitrogen outlet 3 is communicated with an air inlet of the nitrogen circulation fan 48 through a nitrogen return pipe 61, and a nitrogen outlet 43 of the nitrogen flow passage 42 of the heat exchanger 40 is communicated with the high-temperature nitrogen inlet 2 through a high-temperature nitrogen pipe 62;
a reflux nitrogen tar collector 6; the reflux nitrogen tar collector 6 is arranged on a nitrogen reflux pipe 61 between the low-temperature nitrogen outlet 3 and the nitrogen circulating fan 48; and
a gas burner 44 and a combustion fan 5; the gas burner 44 and the combustion fan 5 are arranged beside the combustion hearth 45, the combustion fan 5 is arranged beside the gas burner 44 so as to support the gas burner 44, and a flame port of the gas burner 44 is arranged in the combustion hearth 45.
In the present embodiment, the heat exchanger 40 is a shell-and-tube heat exchanger, the tube side flow path of the heat exchanger 40 is used as the flue gas flow path 46, and the shell side flow path of the heat exchanger 40 is used as the nitrogen flow path 42.
In this embodiment, the nitrogen gas circulation fan 48 is a variable frequency fan.
In the technical scheme, the reflux nitrogen tar collector 6 is a surface cooler taking water or air as a refrigerant, and is provided with a cover plate for condensing tar volatile matters in gas from gas state or mist state to liquid state and collecting the tar volatile matters, and the reflux nitrogen tar collector 6 is provided with a cover plate for conveniently cleaning tar sediments in the interior.
In this technical solution, the pair of reflux nitrogen tar collectors 6 is provided, and the inlet and outlet of the reflux nitrogen tar collector 6 are respectively provided with a first valve 60. When the device is used, the reflux nitrogen tar collector 6 can enable one condenser to work and the other condenser to be cleaned and overhauled by switching the corresponding valve, so that the continuous production of the kiln body is not affected.
In the present technical solution, the nitrogen gas injection branch pipe 63 is provided on the nitrogen gas return pipe 61 at the inlet end of the nitrogen gas circulation fan 48, and continuously injects nitrogen gas to make the kiln chamber and the related pipes slightly positive pressure to resist the entry of external air.
In the technical scheme, a plurality of electric heating rods 8 are arranged in a firing section 12 of the inner cavity of the kiln body 1.
The main difference between the embodiment 3 and the embodiment 2 is that the embodiment 3 eliminates the waste gas outlet and the waste gas tar collector arranged at the top of the kiln cavity and related pipelines, so that all tar volatile matters generated in the calcination process are collected by the reflux nitrogen collector, and after the waste gas outlet is eliminated, the air tightness of the kiln body is higher, and the nitrogen injection amount required for maintaining the positive pressure of the kiln cavity can be reduced, thereby saving the operation cost.
The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (8)
1. The utility model provides a nitrogen atmosphere kiln that gas heating area tar was collected which characterized in that includes:
a kiln body (1), a high-temperature nitrogen inlet (2) and a low-temperature nitrogen outlet (3); a heating section (11), a firing section (12) and a cooling section (13) are sequentially arranged in the kiln body (1), the high-temperature nitrogen inlet (2) is positioned in the firing section (12) of the kiln body (1), and the low-temperature nitrogen outlet (3) is positioned in the heating section (11) of the kiln body (1);
a nitrogen circulation heater (4), a nitrogen return pipe (61) and a high-temperature nitrogen pipe (62); the nitrogen circulation heater (4) comprises a nitrogen circulation fan (48), a heat exchanger (40) and a combustion hearth (45), wherein a nitrogen flow channel (42) and a smoke flow channel (46) are arranged in the heat exchanger (40), the combustion hearth (45) is communicated with a smoke inlet of the smoke flow channel (46) of the heat exchanger (40), a smoke outlet (47) of the smoke flow channel (46) of the heat exchanger (40) is communicated with the outside, a nitrogen inlet (41) of the nitrogen flow channel (42) of the heat exchanger (40) is communicated with an air outlet of the nitrogen circulation fan (48), the low-temperature nitrogen outlet (3) is communicated with an air inlet of the nitrogen circulation fan (48) through a nitrogen return pipe (61), and a nitrogen outlet (43) of the nitrogen flow channel (42) of the heat exchanger (40) is communicated with the high-temperature nitrogen inlet (2) through a high-temperature nitrogen pipe (62);
a reflux nitrogen tar collector (6); the reflux nitrogen and tar collector (6) is arranged on a nitrogen reflux pipe (61) between the low-temperature nitrogen outlet (3) and the nitrogen circulating fan (48); and
a gas burner (44) and a combustion fan (5); the gas burner (44) and the combustion-supporting fan (5) are arranged beside the combustion furnace (45), the combustion-supporting fan (5) is arranged beside the gas burner (44) so as to support combustion of the gas burner (44), and a flame port of the gas burner (44) is arranged in the combustion furnace (45).
2. The gas-fired, heated, tar-containing nitrogen-atmosphere kiln according to claim 1, characterized in that the heat exchanger (40) is a shell-and-tube heat exchanger or a plate heat exchanger.
3. The gas-fired heating zone tar-collecting nitrogen atmosphere kiln according to claim 1, characterized in that the nitrogen circulation fan (48) is a variable frequency fan.
4. The nitrogen atmosphere kiln with tar collection by gas heating according to claim 1, characterized by further comprising an exhaust gas tar collector (7); the kiln is characterized in that an exhaust gas outlet (14) is formed in the kiln top of the heating section (11) of the kiln body (1), the exhaust gas outlet (14) is communicated with the combustion-supporting fan (5), and the exhaust gas tar collector (7) is arranged on a pipeline between the exhaust gas outlet (14) and the combustion-supporting fan (5) of the gas burner (44).
5. The nitrogen atmosphere kiln with tar collection by gas heating according to claim 4, characterized in that the reflux nitrogen tar collector (6) and the exhaust gas tar collector (7) can be surface coolers with circulating water or air as refrigerants, and the reflux nitrogen tar collector (6) and the exhaust gas tar collector (7) are provided with cover plates so as to be convenient for cleaning tar sediments inside.
6. The nitrogen atmosphere kiln with tar collection by gas heating according to claim 4, which is characterized in that the pair of reflux nitrogen tar collectors (6) is provided with a first valve (60) at the inlet and outlet of the reflux nitrogen tar collector (6), the pair of waste gas tar collectors (7) is provided with a second valve (70) at the inlet and outlet of the waste gas tar collector (7).
7. The nitrogen atmosphere kiln with tar collection by gas heating according to claim 1, characterized in that a nitrogen injection branch pipe (63) is arranged on a nitrogen return pipe (61) at the inlet end of the nitrogen circulating fan (48) so as to continuously inject nitrogen to make the kiln cavity and related pipes slightly positive pressure to resist the entry of external air.
8. The nitrogen atmosphere kiln with tar collection by gas heating according to claim 1, which is characterized in that a plurality of electric heating rods (8) are arranged in a firing section (12) of the inner cavity of the kiln body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223059726.1U CN219160929U (en) | 2022-11-18 | 2022-11-18 | Nitrogen atmosphere kiln with tar collection function through gas heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223059726.1U CN219160929U (en) | 2022-11-18 | 2022-11-18 | Nitrogen atmosphere kiln with tar collection function through gas heating |
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| Publication Number | Publication Date |
|---|---|
| CN219160929U true CN219160929U (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223059726.1U Active CN219160929U (en) | 2022-11-18 | 2022-11-18 | Nitrogen atmosphere kiln with tar collection function through gas heating |
Country Status (1)
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| CN (1) | CN219160929U (en) |
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2022
- 2022-11-18 CN CN202223059726.1U patent/CN219160929U/en active Active
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