CN215939370U - Tail gas recovery, purification and cyclic utilization system of roller-hearth annealing furnace - Google Patents
Tail gas recovery, purification and cyclic utilization system of roller-hearth annealing furnace Download PDFInfo
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- CN215939370U CN215939370U CN202022507391.XU CN202022507391U CN215939370U CN 215939370 U CN215939370 U CN 215939370U CN 202022507391 U CN202022507391 U CN 202022507391U CN 215939370 U CN215939370 U CN 215939370U
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Abstract
The utility model belongs to the technical field of tail gas recovery and purification treatment, and discloses a tail gas recovery, purification and cyclic utilization system of a roller-hearth annealing furnace, which comprises a first cooler, a primary booster fan, a fan rear buffer tank, an oil absorber, a filter, a heat exchanger, a heater, a deaerator, a second cooler and an absorber which are sequentially connected through a gas transmission pipe; a tail gas recycling, purifying and recycling system is added on a vent hole of the roller hearth annealing furnace, impurities which are mixed in nitrogen and affect the annealing are purified and removed, and the treated purified nitrogen is introduced into the roller hearth furnace again for recycling, so that the purposes of energy conservation and emission reduction are achieved; the utility model can save more than 80% of nitrogen consumption, save energy, reduce the operation cost of users and reduce the emission of industrial tail gas.
Description
Technical Field
The utility model belongs to the technical field of tail gas recovery and purification treatment, and particularly relates to a tail gas recovery, purification and cyclic utilization system of a roller hearth annealing furnace.
Background
The prior roller hearth annealing furnace at home mostly adopts nitrogen as protective gas, and can produce impurity components with volume not more than 1% in the annealing process and mix into purer nitrogen, and the impurities mainly comprise: the copper pipe comprises a copper pipe body, wherein the copper pipe body is provided with a tail gas inlet, a tail gas outlet, a tail gas inlet, a tail gas outlet, a tail gas inlet, a tail gas outlet, a tail gas inlet, a gas outlet, a gas inlet, a gas outlet, a gas inlet, a gas outlet, a gas inlet, a gas outlet, a gas inlet, a gas outlet, a gas outlet, a gas inlet, a gas outlet, a gas outlet, a gas inlet, a gas.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provides a tail gas recycling system of a roller hearth annealing furnace; the technical scheme adopted for achieving the purpose is as follows:
a tail gas recovery, purification and cyclic utilization system of a roller-hearth annealing furnace comprises a first cooler, a primary booster fan, a fan rear buffer tank, an oil absorber, a filter, a heat exchanger, a heater, a deaerator, a second cooler and an absorber which are sequentially connected through a gas transmission pipe;
a first connecting air pipe for connecting a vent of the roller bottom annealing furnace is arranged at the inlet end of the first cooler, an oil remover is arranged between the first cooler and the primary booster fan, and a bypass valve is arranged between the inlet and the outlet of the oil remover; the primary booster fan comprises two frequency conversion fans which are arranged in parallel, and a check valve is arranged behind each frequency conversion fan; a stop cut-off valve is arranged between the primary booster fan and the fan rear buffer tank, an emptying branch pipe of the fan rear buffer tank and an emptying branch pipe of the oil extractor are converged and then connected with the oil-gas separator, and the emptying branch pipe of the oil-gas separator is merged into an emptying main pipe; a bypass pipe is arranged on a gas transmission pipe between the filter and the heat exchanger, the bypass pipe is connected to the emptying header pipe, and a control valve and a check valve are arranged on the bypass pipe;
the filter is communicated with a first inlet of the heat exchanger, a first outlet of the heat exchanger is communicated with the heater, the heater is communicated with an inlet of the deaerator, an outlet of the deaerator is folded and then communicated with a second inlet of the heat exchanger, a second outlet of the heat exchanger is communicated with a second cooler, an outlet of the second cooler is communicated with an inlet of the adsorber, and a water-gas separator is arranged on a lower discharge pipe of the adsorber; a nitrogen parameter detection device is arranged on an outlet pipe of the adsorber, and then a qualified nitrogen output pipe and an unqualified nitrogen vent pipe are respectively arranged;
the deaerator, the gas-water separator and the unqualified nitrogen gas blow-down pipe are merged and then are merged on the emptying header pipe; the sewage discharge branch pipes of the heat exchanger, the first cooler, the second cooler, the oil-gas separator and the water-gas separator are merged and then are merged onto a sewage discharge main pipe;
the water inlet branch pipes of the first cooler and the second cooler are connected to the circulating water inlet pipeline, and the water outlet branch pipes of the first cooler and the second cooler are connected to the circulating water outlet pipeline.
Preferably, including tail gas recovery control assembly, tail gas recovery control assembly includes the tail gas recovery jar, the entrance point of tail gas recovery jar is equipped with the second connecting tube that is used for connecting the drain of roller end annealing stove, and the free end of first connecting tube is connected at tail gas recovery jar exit end, is equipped with tail gas pressure sensor on the tail gas recovery jar, is equipped with the air release pipe on first connecting tube, and on the air release pipe incorporated into the air release house steward of roller end annealing stove, and be equipped with air release regulating valve and superpressure exhaust-valve on the air release pipe, be equipped with the recovery governing valve on first connecting tube simultaneously, the recovery governing valve is located the rear of air release pipe.
Preferably, still include secondary pressure boost subassembly, secondary pressure boost subassembly includes pure gas high-pressure tank and pure gas low pressure jar, is equipped with two frequency conversion superchargers that set up side by side between pure gas high-pressure tank and pure gas low pressure jar, qualified nitrogen gas output tube connects on pure gas low pressure jar import, all is equipped with gas pressure sensor on pure gas high-pressure tank high pressure output trachea, on qualified nitrogen gas output tube.
Preferably, the oil extractor comprises two first sub oil extractors which are connected in parallel, the inlet ends of the two first sub oil extractors are connected through an inlet valve set, the outlet ends of the two first sub oil extractors are connected through an outlet valve set, and the inlet valve set and the outlet valve set are used for controlling the two first sub oil extractors to work alternately for each other.
Preferably, the filter comprises two sub-filters which are connected in parallel, and the two sub-filters are mutually standby and work alternately.
Preferably, the deaerator comprises two branch deaerators which are connected in parallel, and the two branch deaerators are mutually standby and work alternately.
Preferably, the adsorber comprises two sub-adsorbers which are connected in parallel, the inlet ends of the two sub-adsorbers are connected through an inlet valve group, the outlet ends of the two sub-adsorbers are connected through an outlet valve group, and the inlet valve group and the outlet valve group are used for controlling the two sub-adsorbers to work alternately for standby.
The utility model has the advantages that the tail gas recycling, purifying and recycling system is added on the emptying port of the roller hearth annealing furnace, impurities which are mixed in nitrogen and affect the annealing are purified and removed, and the treated purified nitrogen is introduced into the roller hearth furnace again for recycling, thereby achieving the purposes of energy saving and emission reduction; the utility model can save more than 80% of nitrogen consumption, save energy, reduce the operation cost of users and reduce the emission of industrial tail gas.
The tail gas recovery, purification and cyclic utilization process of the roller bottom annealing furnace is suitable for the tail gas recovery of copper pipe annealing, wire rod spheroidizing annealing and the like, in particular to the roller bottom annealing furnace with a vacuum air lock chamber.
Drawings
FIG. 1 is a schematic view showing the structure of a system for recycling, purifying and recycling tail gas from a roll hearth annealing furnace in embodiment 1;
FIG. 2 is a schematic view showing the structure of a system for recycling, purifying and recycling tail gas from a roll hearth annealing furnace in example 2;
FIG. 3 is a schematic structural diagram of the tail gas recycling process of the roller hearth annealing furnace of the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Specific example 1:
as shown in fig. 1 to 3, a tail gas recovery, purification and cyclic utilization system of a roller hearth annealing furnace comprises a first cooler a, a primary booster fan B, a fan rear buffer tank C, an oil absorber D, a filter E, a heat exchanger F, a heater G, a deaerator H, a second cooler J and an absorber K which are connected in sequence through a gas transmission pipe;
a first connecting air pipe 1 for connecting a vent 19 of the roller hearth annealing furnace 20 is arranged at the inlet end of the first cooler A, an oil remover 3 is arranged between the first cooler A and the primary booster fan B, and a bypass valve 2 is arranged between the inlet and the outlet of the oil remover 3; the primary booster fan B comprises two frequency conversion fans which are arranged in parallel, and a check valve is arranged behind each frequency conversion fan; a stop cut-off valve 6 is arranged between the primary booster fan B and the fan rear buffer tank C, an emptying branch pipe of the fan rear buffer tank C is connected with an oil-gas separator 7 after being converged with an emptying branch pipe of the oil extractor D, and the emptying branch pipe of the oil-gas separator 7 is merged into an emptying header pipe 9 and is discharged through an emptying port 8; a bypass pipe 10 is arranged on a gas pipe 13 between the filter E and the heat exchanger F, the bypass pipe 10 is connected to the emptying header pipe 9, and a control valve and a check valve are arranged on the bypass pipe 10;
the filter E is communicated with a first inlet F1 of the heat exchanger F, a first outlet F3 of the heat exchanger F is communicated with a heater G, the heater G is communicated with an inlet of a deaerator H, an outlet of the deaerator H is folded and then communicated with a second inlet F2 of the heat exchanger F, a second outlet F4 of the heat exchanger F is communicated with a second cooler J, an outlet J of the second cooler is communicated with an inlet of an adsorber K, and a water-gas separator 15 is arranged on a lower discharge pipe of the adsorber K; a nitrogen parameter detection device is arranged on an outlet pipe of the absorber K, and then a qualified nitrogen output pipe 16 and an unqualified nitrogen vent pipe 17 are respectively arranged;
the deaerator H, the gas-water separator 15 and the unqualified nitrogen blow-down pipe 17 are merged and then are merged on the emptying header pipe 9; the sewage discharge branch pipes of the heat exchanger F, the first cooler A, the second cooler J, the oil-gas separator 7 and the water-gas separator 15 are merged and then are merged onto a sewage discharge main pipe and discharged through a sewage discharge port 14;
the water circulation system further comprises a circulation water inlet pipeline 11 and a circulation water outlet pipeline 12, water inlet branch pipes of the first cooler A and the second cooler J are connected to the circulation water inlet pipeline 11, and water outlet branch pipes of the first cooler A and the second cooler J are connected to the circulation water outlet pipeline 12.
Specific example 2:
as shown in fig. 1 and 2, a tail gas recovery control assembly L is further arranged in front of the first cooler a, the tail gas recovery control assembly L includes a tail gas recovery tank L2, the inlet end of the tail gas recovery tank L2 is provided with a second connecting gas pipe 11 for connecting the vent 19 of the roller hearth annealing furnace 20, the free end of the first connecting gas pipe 1 is connected to the outlet end of the tail gas recovery tank L2, the tail gas recovery tank L2 is provided with a tail gas pressure sensor L3, the first connecting gas pipe 1 is provided with a vent gas pipe L4, the vent gas pipe L4 is merged into the vent main pipe 18 of the roller hearth annealing furnace 20, the vent gas pipe L4 is provided with a vent regulating valve L6 and an overpressure evacuation valve L5, and the first connecting gas pipe 1 is provided with a recovery regulating valve L7, and the recovery regulating valve L7 is located behind the vent gas pipe L4.
Still be equipped with secondary pressure boost subassembly M on qualified nitrogen gas output tube 16, secondary pressure boost subassembly M includes pure gas high-pressure tank M1 and pure gas low pressure jar M3, is equipped with two frequency conversion booster compressors M2 that set up side by side between pure gas high-pressure tank M1 and pure gas low pressure jar M3, qualified nitrogen gas output tube 16 is connected on pure gas low pressure jar M3 import, on pure gas high-pressure tank M1 high pressure output trachea, all be equipped with gas pressure sensor on qualified nitrogen gas output tube 16.
Further, the oil extractor D comprises two first sub oil extractors connected in parallel, inlet ends of the two first sub oil extractors are connected through an inlet valve set, outlet ends of the two first sub oil extractors are connected through an outlet valve set, and the inlet valve set and the outlet valve set are used for controlling the two first sub oil extractors to work alternately for each other. The filter E comprises two sub-filters which are connected in parallel, and the two sub-filters are mutually standby and work alternately. The deaerator H comprises two branch deaerators which are connected in parallel, and the two branch deaerators are standby and work alternately. The adsorber K comprises two sub-adsorbers which are connected in parallel, the inlet ends of the two sub-adsorbers are connected through an inlet valve group, the outlet ends of the two sub-adsorbers are connected through an outlet valve group, and the inlet valve group and the outlet valve group are used for controlling the two sub-adsorbers to work alternately in a standby mode.
As shown in fig. 1 to 3, by using the tail gas recycling, purifying and recycling process of the roller hearth annealing furnace, the overpressure discharge port of the roller hearth annealing furnace 20 is connected to the emptying header 18 of the roller hearth annealing furnace 20, the tail gas of the roller hearth annealing furnace 20 firstly enters the tail gas recycling tank L2 for buffering treatment, then the tail gas is cooled to below 40 ℃ by the first cooler a, then the tail gas is pressurized to 40Kpa by the primary booster fan B and stored in the fan rear buffer tank C, then the tail gas is pretreated by the oil extractor D, then enters the filter E, enters the first inlet F1 of the heat exchanger F after being treated by the filter E, flows out of the first outlet F3 of the heat exchanger F after heat exchange into the heater G, then is treated by the deaerator H, then returns from the outlet of the deaerator G to enter the second inlet F2 of the heat exchanger F, flows out of the second outlet F4 of the heat exchanger F into the second cooler J, finally, the nitrogen with high purity meeting the requirement is formed after being processed by the absorber K; when the intelligent control system works, the electric control system 5 controls the action and transmits data of each sensor, and the dotted line 4 indicates the control part, so that the core utility model of the intelligent control system can be realized by adopting the existing control part.
The first inlet F1 of the heat exchanger F is a cold air inlet, the first outlet F3 is a cold air outlet, the second inlet F2 is a hot air inlet, the second outlet F4 is a hot air outlet, the temperature of the cold air inlet is 30 ℃, the temperature of the cold air outlet is 140 ℃, the temperature of the hot air inlet is 280 ℃, and the temperature of the hot air outlet is 150 ℃. Finally, the nitrogen passing through the secondary pressurizing assembly 19 reaches the following parameters after passing through the air outlet pressure regulating device: the nitrogen content is more than or equal to 99.999 percent, the oxygen content is not more than 5ppm, and the total content of carbon monoxide, carbon dioxide and methane is not more than 5 ppm. And the qualified nitrogen with the nitrogen content of more than or equal to 99.999 percent is merged into the original qualified nitrogen pipeline 23 for recycling.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A tail gas recovery, purification and cyclic utilization system of a roller hearth annealing furnace is characterized by comprising a first cooler, a primary booster fan, a fan rear buffer tank, an oil absorber, a filter, a heat exchanger, a heater, a deaerator, a second cooler and an absorber which are sequentially connected through a gas transmission pipe;
a first connecting air pipe for connecting a vent of the roller bottom annealing furnace is arranged at the inlet end of the first cooler, an oil remover is arranged between the first cooler and the primary booster fan, and a bypass valve is arranged between the inlet and the outlet of the oil remover; the primary booster fan comprises two frequency conversion fans which are arranged in parallel, and a check valve is arranged behind each frequency conversion fan; a stop cut-off valve is arranged between the primary booster fan and the fan rear buffer tank, an emptying branch pipe of the fan rear buffer tank and an emptying branch pipe of the oil extractor are converged and then connected with the oil-gas separator, and the emptying branch pipe of the oil-gas separator is merged into an emptying main pipe; a bypass pipe is arranged on a gas transmission pipe between the filter and the heat exchanger, the bypass pipe is connected to the emptying header pipe, and a control valve and a check valve are arranged on the bypass pipe;
the filter is communicated with a first inlet of the heat exchanger, a first outlet of the heat exchanger is communicated with the heater, the heater is communicated with an inlet of the deaerator, an outlet of the deaerator is folded and then communicated with a second inlet of the heat exchanger, a second outlet of the heat exchanger is communicated with a second cooler, an outlet of the second cooler is communicated with an inlet of the adsorber, and a water-gas separator is arranged on a lower discharge pipe of the adsorber; a nitrogen parameter detection device is arranged on an outlet pipe of the adsorber, and then a qualified nitrogen output pipe and an unqualified nitrogen vent pipe are respectively arranged;
the deaerator, the gas-water separator and the unqualified nitrogen gas blow-down pipe are merged and then are merged on the emptying header pipe; the sewage discharge branch pipes of the heat exchanger, the first cooler, the second cooler, the oil-gas separator and the water-gas separator are merged and then are merged onto a sewage discharge main pipe;
the water inlet branch pipes of the first cooler and the second cooler are connected to the circulating water inlet pipeline, and the water outlet branch pipes of the first cooler and the second cooler are connected to the circulating water outlet pipeline.
2. The tail gas recycling, purifying and recycling system of the roller hearth annealing furnace according to claim 1, comprising a tail gas recycling control assembly, wherein the tail gas recycling control assembly comprises a tail gas recycling tank, the inlet end of the tail gas recycling tank is provided with a second connecting gas pipe for connecting the vent of the roller hearth annealing furnace, the free end of the first connecting gas pipe is connected to the outlet end of the tail gas recycling tank, the tail gas recycling tank is provided with a tail gas pressure sensor, the first connecting gas pipe is provided with a vent gas pipe, the vent gas pipe is merged into the vent main pipe of the roller hearth annealing furnace, the vent gas pipe is provided with a vent regulating valve and an overpressure emptying valve, the first connecting gas pipe is provided with a recycling regulating valve, and the recycling regulating valve is positioned behind the vent gas pipe.
3. The tail gas recycling, purifying and recycling system of the roller hearth annealing furnace according to claim 1, further comprising a secondary pressurizing assembly, wherein the secondary pressurizing assembly comprises a pure gas high-pressure tank and a pure gas low-pressure tank, two frequency conversion superchargers arranged in parallel are arranged between the pure gas high-pressure tank and the pure gas low-pressure tank, the qualified nitrogen gas output pipe is connected to an inlet of the pure gas low-pressure tank, and gas pressure sensors are arranged on a high-pressure output gas pipe of the pure gas high-pressure tank and on the qualified nitrogen gas output pipe.
4. The tail gas recovery, purification and recycling system of a roller hearth annealing furnace according to any one of claims 1 to 3, wherein the oil extractor comprises two first sub oil extractors which are connected in parallel, the inlet ends of the two first sub oil extractors are connected through an inlet valve set, the outlet ends of the two first sub oil extractors are connected through an outlet valve set, and the inlet valve set and the outlet valve set are used for controlling the two first sub oil extractors to work alternately in reserve.
5. The tail gas recovery, purification and recycling system of the roller hearth annealing furnace according to any one of claims 1 to 3, wherein the filter comprises two sub-filters which are connected in parallel and are standby to work alternately.
6. The tail gas recovery, purification and recycling system of the roller hearth annealing furnace according to any one of claims 1 to 3, characterized in that the deaerator comprises two branch deaerators which are connected in parallel and are standby to operate alternately.
7. The tail gas recovery, purification and recycling system of the roller hearth annealing furnace according to any one of claims 1 to 3, wherein the adsorbers comprise two sub-adsorbers which are connected in parallel, the inlet ends of the two sub-adsorbers are connected through an inlet valve group, the outlet ends of the two sub-adsorbers are connected through an outlet valve group, and the inlet valve group and the outlet valve group are used for controlling the two sub-adsorbers to work alternately in a standby mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112246024A (en) * | 2020-11-03 | 2021-01-22 | 河南省科荣气体设备有限公司 | Tail gas recovery, purification and cyclic utilization system and process of roller hearth annealing furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246024A (en) * | 2020-11-03 | 2021-01-22 | 河南省科荣气体设备有限公司 | Tail gas recovery, purification and cyclic utilization system and process of roller hearth annealing furnace |
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