CN204943513U - A kind of tail gas recycling system of maleic anhydride production - Google Patents
A kind of tail gas recycling system of maleic anhydride production Download PDFInfo
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- CN204943513U CN204943513U CN201520669074.4U CN201520669074U CN204943513U CN 204943513 U CN204943513 U CN 204943513U CN 201520669074 U CN201520669074 U CN 201520669074U CN 204943513 U CN204943513 U CN 204943513U
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Abstract
The utility model discloses a kind of tail gas recycling system of maleic anhydride production, comprise absorption tower, First Heat Exchanger, the second heat exchanger and catalytic reaction burner, catalytic combustion reactor comprises the bringing-up section, conversion zone and the gas storage section that set gradually from top to bottom, heater and deflection plate are installed in bringing-up section, 2 layers of catalyst layer are provided with in conversion zone, waste gas outlet in gas storage section is connected with chimney, and gas outlet is connected with exhaust boiler by pipeline, and the outlet of waste heat boiler is connected with drum.The utility model not only meets the temperature requirement needed for reaction, reaction is not easily fluctuated, good Catalytic Combustion Effect can be ensured, the effectiveness comparison of tail gas clean-up is obvious, exhaust emissions requirement definitely can be reached completely, and the effective utilization rate improving heat energy, reduce the energy resource consumption of device, have stable, use, safeguard simple, easy and simple to handle, wide adaptability, the feature that security is good, be easy to promote the use of.
Description
Technical field
The utility model belongs to chemical mechanical equipment technical field, is specifically related to a kind of tail gas recycling system of maleic anhydride production.
Background technology
At present, the main technique that China produces cis-butenedioic anhydride is that benzene oxidatoin method is produced, and namely under the catalytic oxidation of fixed bde catalyst, produce cis-butenedioic anhydride gas by the oxygen in vaporization benzene and air, cis-butenedioic anhydride gas is again after partial condensation, and cis-butenedioic anhydride product is produced in rectifying.But, benzene is in the process of oxydation to produce maleic anhydride, a large amount of waste gas can be produced, containing the organic matter of promising conversion, carbon monoxide and carbon dioxide in these waste gas, owing to containing a certain proportion of harmful, poisonous material in above-mentioned waste gas, put if in line, environment and the infringement of not only polluting surrounding are healthy, do not reach the standard of gas discharging completely, do not meet the requirement of environmental protection, and also containing a large amount of imflammable gas in these waste gas, directly discharge, meet the danger that naked light is easily explosion caused.In order to process the waste gas produced in cis-anhydride production process, the method of normal employing mainly contains absorption method, combustion method and Production by Catalytic Combustion Process, the feature that the cost that absorption method tool equipment in need is many, heat exchange area large, run is high, equipment requirement is high, absorbent needs periodic replacement, process complexity, combustion method is suitable only for the process to high concentrations of gas, condition that is high to the temperature requirement adding fuel in the process of burning, burning is harsh, its high cost run, is not suitable for the vent gas treatment of cis-butenedioic anhydride.Now, the waste gas that cis-butenedioic anhydride produces adopts Production by Catalytic Combustion Process usually, the equipment absorption tower that its Production by Catalytic Combustion Process mainly comprises, heat exchanger, heater, catalytic combustion reactor, carrying out vent gas treatment is, the waste gas produced is after the pretreatment of absorption tower, the gas of discharging from top, absorption tower, after heat exchanger and after heater, reaches the object of Purge gas after entering catalytic combustion reactor and catalyst reaction after being heated to certain temperature.Above-mentioned tail gas clean-up recovery system finds in the use procedure of reality, and not only the floor space of device is comparatively large, complex structure, temperature controls steady, and when in waste gas during gas concentration superelevation, easily causes the temperature of catalyst self to raise, heat-obtaining is delayed, make catalyst overtemperature, affect the service life of catalyst, simultaneously, the external world is needed to provide the energy in the process of catalytic reaction, the heat produced directly enters again in air, and easily cause the waste of resource, the recovery utilization rate of heat energy is lower.Therefore, the tail gas recycling system developing a kind of compact conformation, floor space is little, operating cost is low, Catalytic Combustion Effect is good, energy recovery utilization rate is high, can effectively improve the maleic anhydride production of job safety performance is desirability.
Summary of the invention
The purpose of this utility model is to provide that a kind of compact conformation, floor space are little, operating cost is low, Catalytic Combustion Effect is good, energy recovery utilization rate is high, effectively can improve the tail gas recycling system of the maleic anhydride production of job safety performance.
The purpose of this utility model realizes like this, comprise absorption tower, First Heat Exchanger, second heat exchanger and catalytic reaction burner, catalytic combustion reactor comprises the bringing-up section set gradually from top to bottom, conversion zone and gas storage section, bringing-up section, for removably connecting between conversion zone and gas storage section, heater and deflection plate are installed in bringing-up section, deflection plate comprises two groups, one group is U-shaped deflection plate, upwards uncovered, another group is for being set in the Y type deflection plate on U-shaped deflection plate, Y type deflection plate opening up, 2 layers of catalyst layer are provided with in conversion zone, waste gas outlet in gas storage section is connected with chimney, gas outlet is connected with exhaust boiler by pipeline, the outlet of waste heat boiler is connected with drum.
The utility model is by the rational modification to catalytic combustion reactor, effectively simplify the structure of system, utilization is arranged on catalytic combustion reactor internal heater and deflection plate, the gas entered in reactor can be made to carry out sufficient heat exchange and preheating, not only meet the temperature requirement needed for reaction, and it is stable in the temperature gentleness of catalytic section, not easily fluctuate, good Catalytic Combustion Effect can be ensured, catalytic reaction is more abundant, the effectiveness comparison of tail gas clean-up is obvious, the long service life of catalyst, exhaust emissions requirement definitely can be reached completely, simultaneously, temperature after catalytic reaction is high, by coordinating high efficiency waste heat boiler, heat in the waste gas of generation can be recycled, the utilization rate of maximum raising heat energy, reduce the energy resource consumption of device, the cost of effective control, the utility model has stable, use, safeguard simple, easy and simple to handle, wide adaptability, the feature that security is good, be easy to promote the use of.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of catalytic combustion reactor;
In figure: 1-absorption tower, 2-drum, 3-waste heat boiler, 4-chimney, 5-catalytic combustion reactor, 51-air inlet, 52-bringing-up section, 53-air mixer, 54-heater, 55-flange components, 56-catalyst layer, 57-gas outlet, 58-gas storage section, 59-waste gas outlet, 510-conversion zone, 511-Y type deflection plate, 512-gas returning port, 513-U type deflection plate, 514-air intlet, 6-blower fan, 7-second heat exchanger, 8-First Heat Exchanger.
Detailed description of the invention
Be further described the utility model below in conjunction with accompanying drawing, but limited the utility model never in any form, any change done based on the utility model training centre or improvement, all belong to protection domain of the present utility model.
As shown in Fig. 1 ~ 2, the utility model comprises absorption tower 1, First Heat Exchanger 8, second heat exchanger 7 and catalytic reaction burner 5, catalytic combustion reactor 5 comprises the bringing-up section 52 set gradually from top to bottom, conversion zone 510 and gas storage section 58, described bringing-up section 52, for removably connecting between conversion zone 510 and gas storage section 58, heater 54 and deflection plate are installed in bringing-up section 52, deflection plate comprises two groups, one group is U-shaped deflection plate 513, upwards uncovered, another group is for being set in the Y type deflection plate 511 on U-shaped deflection plate 513, described Y type deflection plate 511 opening up, 2 layers of catalyst layer 56 are provided with in conversion zone 510, waste gas outlet 59 in gas storage section 58 is connected with chimney 4, gas outlet 57 is connected with waste heat boiler 3 by pipeline, the outlet of waste heat boiler 3 is connected with drum 2.
In order to waste gas can be made to carry out sufficient preheating, ensure the uniformity of heating by the exhaust gases, further improve the efficiency of heat transfer, preferably the both sides of described U-shaped deflection plate 513 are straight flange, base is taper or arc, and the upper end of described Y shape deflection plate 511 is taper, and lower end is straight tube shape.
Further, described bringing-up section 54, being connected by flange components 55 between conversion zone 510 and gas storage section 58, is for the ease of the maintenance in later stage, maintenance and replacing.
In order to reach good Catalytic Combustion Effect, the height of described catalyst layer 56 is 180 ~ 200mm,
Further, the gas outlet 57 of described gas storage section 58 is also provided with return line, the end of return line is connected with the gas returning port 512 in bringing-up section 52, in order to the waste heat after catalytic combustion can be utilized fully, that heat disturbance arrives in bringing-up section 52, the EGT in bringing-up section 52 is allowed to be rapidly heated, reach the temperature required for catalytic reaction as soon as possible, and then reduce the energy consumption of heater 54, contact fully and waste heat in order to the heat of backflow and waste gas can be made, preferably, above the air inlet 51 in described bringing-up section 52, air mixer 53 is installed.
In order to prevent the material heat exchanger in waste gas from causing corrosion, described First Heat Exchanger 8 is titanium pipe heat exchanger, and described second heat exchanger 7 is board-like stainless heat exchanger, and not only heat exchange efficiency is high, and resistance is little.
Further, the pipeline of the air intlet bottom described bringing-up section 52 is provided with blower fan 6, described blower fan 6 is frequency control blower fan, can according to the air quantity of actual condition by regulating supply frequency to adjust blower fan 6.
The course of work of the present utility model is: the maleic anhydride waste gas discharged by absorption tower 1 is by after First Heat Exchanger 8 and the first preheating of the second heat exchanger 7, enter in bringing-up section 52 from the air inlet 514 bottom catalytic combustion reactor 5, after the waste gas entered in bringing-up section 52 is mixed by air mixer 53 with air, the gas mixed under the effect of U-shaped deflection plate 513 from both sides shunting contact with heater 54 after to flowing, again contact with heater 54 downwards under the effect of Y type deflection plate 511 simultaneously, then contact backward upper reaches from the center third time of bringing-up section 52 with heater 54 to continue to flow, this deflection plate can make the abundant preheating of waste gas, ensure the stability of heated air, for catalytic reaction provides good reaction condition, after EGT reaches the numerical value of technological requirement, enter in conversion zone 510 and carry out sufficient catalyst combustion reaction, reacted heat energy enters all gas storage sections 58, after carrying out exchange heat by gas outlet 57 and the heat pipe in waste heat boiler 3, waste heat enters in drum 2 and stores, a part of heat that gas outlet 57 is discharged then enters into bringing-up section 52 for improving the temperature of waste gas fast from gas returning port 512, and purified gas is directly discharged in air by chimney 4 through waste gas outlet 59.
Claims (8)
1. the tail gas recycling system of a maleic anhydride production, comprise absorption tower (1), First Heat Exchanger (8), second heat exchanger (7) and catalytic reaction burner (5), it is characterized in that: described catalytic combustion reactor (5) comprises the bringing-up section (52) set gradually from top to bottom, conversion zone (510) and gas storage section (58), bringing-up section (52), for removably connecting between conversion zone (510) and gas storage section (58), heater (54) and deflection plate are installed in bringing-up section (52), deflection plate comprises two groups, one group is U-shaped deflection plate (513), upwards uncovered, another group is for being set in the Y type deflection plate (511) on U-shaped deflection plate (513), Y type deflection plate (511) opening up, 2 layers of catalyst layer (56) are provided with in conversion zone (510), waste gas outlet (59) in gas storage section (58) is connected with chimney (4), gas outlet (57) is connected with waste heat boiler (3) by pipeline, the outlet of waste heat boiler (3) is connected with drum (2).
2. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: the both sides of U-shaped deflection plate (513) are straight flange, and base is taper or arc, and the upper end of Y shape deflection plate (511) is taper, and lower end is straight tube shape.
3. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: bringing-up section (54), between conversion zone (510) and gas storage section (58) by flange components (55) connect.
4. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: the height of catalyst layer (56) is 180 ~ 200mm.
5. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, it is characterized in that: the gas outlet (57) of gas storage section (58) is also provided with return line, the end of return line is connected with the gas returning port (512) in bringing-up section (52).
6. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: First Heat Exchanger (8) is titanium pipe heat exchanger, and the second heat exchanger (7) is board-like stainless heat exchanger.
7. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: the pipeline of the air intlet of bringing-up section (52) bottom is provided with blower fan (6), and blower fan (6) is frequency control blower fan.
8. the tail gas recycling system of a kind of maleic anhydride production according to claim 1, is characterized in that: air inlet (51) top in bringing-up section (52) is provided with air mixer (53).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520669074.4U CN204943513U (en) | 2015-09-01 | 2015-09-01 | A kind of tail gas recycling system of maleic anhydride production |
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| CN201520669074.4U CN204943513U (en) | 2015-09-01 | 2015-09-01 | A kind of tail gas recycling system of maleic anhydride production |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801879A (en) * | 2016-12-16 | 2017-06-06 | 芜湖万向新元环保科技有限公司 | A kind of exhaust fume catalytic aoxidizes chamber device |
| CN107504506A (en) * | 2017-07-11 | 2017-12-22 | 福州大学 | One kind catalysis burning purification technique and its device |
| CN111964024A (en) * | 2020-08-31 | 2020-11-20 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery method |
| CN111964023A (en) * | 2020-08-31 | 2020-11-20 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery system |
-
2015
- 2015-09-01 CN CN201520669074.4U patent/CN204943513U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106801879A (en) * | 2016-12-16 | 2017-06-06 | 芜湖万向新元环保科技有限公司 | A kind of exhaust fume catalytic aoxidizes chamber device |
| CN107504506A (en) * | 2017-07-11 | 2017-12-22 | 福州大学 | One kind catalysis burning purification technique and its device |
| CN111964024A (en) * | 2020-08-31 | 2020-11-20 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery method |
| CN111964023A (en) * | 2020-08-31 | 2020-11-20 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery system |
| CN111964023B (en) * | 2020-08-31 | 2022-02-11 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery system |
| CN111964024B (en) * | 2020-08-31 | 2022-02-11 | 宁波弘景环保科技有限公司 | Waste gas waste heat recovery method |
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