CN213589751U - Waste gas collecting and treating system in hydrogen peroxide production process - Google Patents
Waste gas collecting and treating system in hydrogen peroxide production process Download PDFInfo
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- CN213589751U CN213589751U CN202021898053.7U CN202021898053U CN213589751U CN 213589751 U CN213589751 U CN 213589751U CN 202021898053 U CN202021898053 U CN 202021898053U CN 213589751 U CN213589751 U CN 213589751U
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Abstract
The utility model discloses a waste gas collecting and treating system in hydrogen peroxide solution production process, include: the oxidation tower provides a place for producing hydrogen peroxide; the oxidized tail gas heat exchanger comprises a cold fluid channel and a hot fluid channel, and an inlet of the hot fluid channel is connected with a tail gas outlet of the oxidation tower; an inlet of the oxidation tail gas separator A is connected with an outlet of the hot fluid channel; the inlet of the oxidized tail gas water cooler is connected with the outlet of the oxidized tail gas separator A, and the outlet of the oxidized tail gas water cooler is connected with the inlet of a cold fluid channel of the oxidized tail gas heat exchanger through the oxidized tail gas separator B; an inlet of the expansion unit is connected with an outlet of a cold fluid channel of the oxidized tail gas heat exchanger; the inlet of the carbon fiber adsorption device is connected with the outlet of the expansion unit; and the inlet of the carbon fiber emptying pipe is connected with the outlet of the carbon fiber adsorption device, and the outlet of the carbon fiber emptying pipe is connected with the boiler through a centrifugal fan.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, concretely relates to exhaust-gas collection processing system in hydrogen peroxide solution production process.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
In the production process of hydrogen peroxide, the tail gas of the oxidation of a dilute product process, the tail gas of the emptying of a carclazyte bed, the tail gas of the emptying of a circulating working solution storage tank, the tail gas of the emptying of a raffinate separator, the tail gas of the emptying of a vacuum pump of a concentrated product process, the tail gas of the emptying of an acidic waste working solution storage tank and the tail gas of the emptying of an alkaline waste working solution storage tank contain VOCs waste gas.
SUMMERY OF THE UTILITY MODEL
To the technical problem that exists among the prior art, the utility model provides a processing system is collected to waste gas in hydrogen peroxide solution production process.
In order to solve the above technical problem, one or more embodiments of the present invention provide the following technical solutions:
the utility model provides a waste gas collecting and treating system in hydrogen peroxide production process, include:
the oxidation tower provides a place for producing hydrogen peroxide;
the oxidized tail gas heat exchanger comprises a cold fluid channel and a hot fluid channel, and an inlet of the hot fluid channel is connected with a tail gas outlet of the oxidation tower;
an inlet of the oxidation tail gas separator A is connected with an outlet of the hot fluid channel;
the inlet of the oxidized tail gas water cooler is connected with the outlet of the oxidized tail gas separator A, and the outlet of the oxidized tail gas water cooler is connected with the inlet of a cold fluid channel of the oxidized tail gas heat exchanger through the oxidized tail gas separator B;
an inlet of the expansion unit is connected with an outlet of a cold fluid channel of the oxidized tail gas heat exchanger;
the inlet of the carbon fiber adsorption device is connected with the outlet of the expansion unit;
and the inlet of the carbon fiber emptying pipe is connected with the outlet of the carbon fiber adsorption device, and the outlet of the carbon fiber emptying pipe is connected with the boiler through a centrifugal fan.
Compared with the prior art, the utility model discloses an above one or more technical scheme have gained following beneficial effect:
by adopting the waste gas collecting and treating system, the tail gas discharged from the top of the oxidation tower can be thoroughly treated, and the pollution to the surrounding environment is effectively avoided.
The oxidized tail gas cooled by the water cooler is used for cooling the high-temperature oxidized tail gas, so that the cold energy can be recovered, and the cascade utilization of energy can be realized. Part of working fluid aromatic hydrocarbon is carried in the oxidized tail gas out of the oxidation tower, the tail gas after the first-stage cooling separation is directly cooled by cooling water through two-stage cooling and two-stage separation, and the tail gas after the second-stage cooling is returned to the heat exchanger to provide heat exchange for hot gas in the oxidation tower, so that the consumption of the cooling water is effectively reduced.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic view of the overall structure of a hydrogen peroxide waste gas collecting and treating system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an oxidation tail gas collecting and treating system discharged from the top of an oxidation tower according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for collecting and processing respiratory waste gas of a circulating working fluid storage tank according to an embodiment of the present invention.
Wherein, 1, an oxidation tower, 2, an oxidation tail gas heat exchanger, 3, oxidation tail gas separators A, 4, oxidation tail gas separators B, 5, an oxidation tail gas water cooler, 6, an expansion unit, 7, a carbon fiber adsorption device, 8, a carbon fiber blow-down pipe, 9, a valve, 10, a flame arrester, 11, a valve, 12, a flame arrester, 13, a blow-down cooler, 14, a raffinate separator, 15, an acidic waste working solution storage tank, 16, an alkaline waste working solution storage tank, 17, a concentrated product vacuum pump 18, a circulating working liquid storage tank 19, a flame arrester 20, a flame arrester 21, a circulating working liquid storage tank emptying condenser 22, a valve 23, a valve 24, an activated carbon tank 25, a valve 26, a valve 27, a flame arrester 28, a flame arrester 29, a valve 30, a carclazyte bed 31, a centrifugal fan 32, a waste water separation tank 33 and a waste water separation pump.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In a first aspect, the present invention provides a waste gas collecting and treating system in hydrogen peroxide production process, including:
the oxidation tower provides a place for producing hydrogen peroxide;
the oxidized tail gas heat exchanger comprises a cold fluid channel and a hot fluid channel, and an inlet of the hot fluid channel is connected with a tail gas outlet of the oxidation tower; the oxidized tail gas cooled by the water cooler is used for cooling the high-temperature oxidized tail gas, so that the cold energy can be recovered, and the cascade utilization of energy can be realized. Part of working fluid aromatic hydrocarbon is carried in the oxidized tail gas out of the oxidation tower, the tail gas after the first-stage cooling separation is directly cooled by cooling water through two-stage cooling and two-stage separation, and the tail gas after the second-stage cooling is returned to the heat exchanger to provide heat exchange for hot gas in the oxidation tower, so that the consumption of the cooling water is effectively reduced.
An inlet of the oxidation tail gas separator A is connected with an outlet of the hot fluid channel; aromatic hydrocarbons carried in the oxidation tail gas are primarily separated, and the separation load of the subsequent process is reduced.
The inlet of the oxidized tail gas water cooler is connected with the outlet of the oxidized tail gas separator A, and the outlet of the oxidized tail gas water cooler is connected with the inlet of a cold fluid channel of the oxidized tail gas heat exchanger through the oxidized tail gas separator B;
an inlet of the expansion unit is connected with an outlet of a cold fluid channel of the oxidized tail gas heat exchanger; the turbo expander is a high-speed rotating blade machine for generating cold energy, and adopts an inverse pressure boosting flow. The gas with certain pressure and temperature from the process flow enters a turbine expander to do work (the expansion work is absorbed by a coaxial compressor). According to the thermodynamic theorem, when the gas expands to do work, the internal energy is reduced, and the temperature is inevitably reduced, so that the cold energy is generated.
The inlet of the carbon fiber adsorption device is connected with the outlet of the expansion unit; the oxidized tail gas is adsorbed, desorbed and regenerated, the gas is further purified, and aromatic hydrocarbon and the like in the tail gas are recycled.
And the inlet of the carbon fiber emptying pipe is connected with the outlet of the carbon fiber adsorption device, and the outlet of the carbon fiber emptying pipe is connected with the boiler through a centrifugal fan. Prevent that the fan breaks down and causes the carbon fiber to suppress the pressure, oxidation tower pressure height influences the operation.
In some embodiments, the system further comprises a waste water separation tank, and the waste water separation tank is communicated with a connecting pipeline between the centrifugal fan and the boiler.
Adopt the waste water knockout drum to separate the recovery to the comdenstion water in the tail gas, when preventing that it from getting into the burning in the boiler, produce adverse effect to the normal operating of boiler.
In some embodiments, further comprising a raffinate separator in communication with the centrifugal fan via an air cooler.
The waste gas discharged from the raffinate separator is sent to a boiler by a centrifugal fan to be combusted after aromatic hydrocarbon carried in a part of the waste gas is condensed by a discharge cooler, so that the environment pollution caused by the aromatic hydrocarbon is prevented.
In some embodiments, the acidic waste working fluid storage tank, the alkaline waste working fluid storage tank, and the concentrate vacuum pump are all in communication with the centrifugal fan. The waste gas is sent to the boiler for combustion, so as to prevent pollution to the environment.
In some embodiments, the system further comprises a circulating working fluid storage tank, and the circulating working fluid storage tank is connected with the centrifugal fan through a vent condenser and an activated carbon tank.
The circulating working solution storage tank breathes the waste gas, and the waste gas is condensed by an emptying condenser to recycle part of the solvent, and then the waste gas is sent to a boiler by a centrifugal fan for combustion treatment after being adsorbed by an activated carbon tank.
In some embodiments, the clay bed is connected to the centrifugal fan through an activated carbon canister.
The carclazyte bed breathing waste gas is sent to a boiler for combustion by a centrifugal fan after being adsorbed by an activated carbon tank.
In a second aspect, the utility model provides a method for collecting and treating waste gas in hydrogen peroxide production process, which comprises the following steps:
the tail gas discharged from the hydrogen peroxide production oxidation tower is cooled through an oxidation tail gas heat exchanger, and the cooled oxidation tail gas is subjected to gas-liquid separation and then enters an oxidation tail gas water cooler to be continuously cooled;
after gas-liquid separation, the oxidation tail gas after continuous temperature reduction returns to the oxidation tail gas heat exchanger to exchange heat with the high-temperature oxidation tail gas;
the oxidized tail gas after heat exchange enters an expansion unit to be continuously cooled, then enters a carbon fiber adsorption device to be adsorbed, and then enters a carbon fiber emptying pipe;
and oxidizing tail gas flowing out of the carbon fiber emptying pipe enters the boiler to be combusted under the conveying action of the centrifugal fan.
In some embodiments, the method further comprises the step of feeding tail gas discharged by the circulating working solution storage tank, tail gas discharged by the clay bed, tail gas discharged by the raffinate separator, tail gas discharged by the concentrated product vacuum pump, tail gas discharged by the acidic waste working solution storage tank or tail gas discharged by the alkaline waste working solution storage tank into a boiler for combustion treatment by using a centrifugal fan.
Example 1
As shown in fig. 1 and 3, the system for collecting and treating waste gas in the hydrogen peroxide production process comprises:
the oxidation tower provides a place for producing hydrogen peroxide;
the oxidized tail gas heat exchanger comprises a cold fluid channel and a hot fluid channel, and an inlet of the hot fluid channel is connected with a tail gas outlet of the oxidation tower;
an inlet of the oxidation tail gas separator A is connected with an outlet of the hot fluid channel;
the inlet of the oxidized tail gas water cooler is connected with the outlet of the oxidized tail gas separator A, and the outlet of the oxidized tail gas water cooler is connected with the inlet of a cold fluid channel of the oxidized tail gas heat exchanger through the oxidized tail gas separator B;
an inlet of the expansion unit is connected with an outlet of a cold fluid channel of the oxidized tail gas heat exchanger;
the inlet of the carbon fiber adsorption device is connected with the outlet of the expansion unit;
the carbon fiber blow-down pipe, its import and carbon fiber adsorption equipment's exit linkage, its export is connected with the boiler through centrifugal fan, and the connecting tube intercommunication between waste water knockout drum and centrifugal fan and the boiler.
The raffinate separator is communicated with a centrifugal fan through an emptying cooler, and a first valve 9 and a first flame arrester 12 are arranged on the communicating pipeline.
The acid waste working solution storage tank 16, the alkaline waste working solution storage tank 15 and the concentrated product vacuum pump 17 are all communicated with a centrifugal fan 31. The waste gas is sent to the boiler for combustion, so as to prevent pollution to the environment. A second valve 11 and a second flame arrestor 10 are provided on the communication line.
The circulating working liquid tank 18 is connected with a centrifugal fan 31 through a blow condenser 21 and an activated carbon tank 24.
The lime soil bed 30 is connected to a centrifugal fan 31 through the activated carbon canister 24.
And condensing and separating heavy aromatic hydrocarbons in the tail gas by the oxidized tail gas heat exchanger, the oxidized tail gas separator, the oxidized tail gas water cooler and the expansion unit, adsorbing by carbon fibers, and delivering to a boiler for incineration by a centrifugal fan. In the carbon fiber regeneration desorption process, part of water vapor is taken away by oxidized tail gas, so a wastewater separation tank is arranged before the oxidized tail gas enters a boiler, and separated condensate water is pumped into a sewage tank through a wastewater separation pump.
Circulating working solution storage tank breathing waste gas: the circulating working solution storage tank breathes the waste gas, the circulating working solution storage tank is firstly discharged to the air through the condenser to condense and recover partial solvent, then the solvent is adsorbed by the activated carbon tank, the pipe is arranged behind the valve of the activated carbon tank discharge to be merged into the waste gas recovery pipeline at the inlet of the centrifugal fan, the waste gas is pressurized by the centrifugal fan and sent to the boiler for incineration, and the gas recovery quantity is controlled by the valve.
The carclazyte bed breathes the waste gas: and after the carclazyte bed breathing waste gas is adsorbed by the activated carbon canister, the activated carbon canister is arranged with a pipe after the vent valve and is merged into a waste gas recovery pipeline at the inlet of the centrifugal fan, the waste gas is pressurized by the centrifugal fan and sent to a boiler for incineration, and the recovery gas amount is controlled by the valve.
Emptying waste gas by an extraction raffinate separator: the waste gas discharged from the raffinate separator is condensed by a discharge cooler, heavy aromatic hydrocarbons carried in partial waste gas are condensed by the discharge cooler, a hole is formed in a discharge pipeline of the discharge cooler, the discharge pipeline is merged into a waste gas recovery pipeline at the inlet of a centrifugal fan, the waste gas is pressurized by the centrifugal fan and sent to a boiler for incineration, and the gas recovery quantity is controlled by a valve.
Waste gas breathing of the concentrated vacuum pump: the hydrogen peroxide contains a small amount of organic matters, and in the distillation concentration process, along with the non-condensable gas discharged to the outside atmosphere by the vacuum pump, the concentrated product vacuum pump emptying pipeline is provided with a hole and a pipe, and the hole and the pipe are merged into a centrifugal fan inlet waste gas recovery pipeline, and are pressurized by a centrifugal fan and sent to a boiler for incineration, and the gas recovery quantity is controlled by a valve.
The acid waste working solution storage tank breathes waste gas: and piping at the emptying pipe of the acidic waste working solution storage tank, and merging the piping into the emptying pipe of the concentrated product vacuum pump. And the waste gas on the discharge pipe of the concentrated product vacuum pump is merged into a waste gas recovery pipeline at the inlet of a centrifugal fan, is pressurized by the centrifugal fan and is sent to a boiler for incineration, and the recovered gas amount is controlled by a valve.
And (3) distributing a pipe at the emptying pipe of the alkaline waste working solution storage tank and merging the pipe to the emptying pipe of the concentrated product vacuum pump. And the waste gas on the discharge pipe of the concentrated product vacuum pump is merged into a waste gas recovery pipeline at the inlet of a centrifugal fan, is pressurized by the centrifugal fan and is sent to a boiler for incineration, and the recovered gas amount is controlled by a valve.
Example 2
A waste gas collecting and treating system in a hydrogen peroxide production process is used for further collecting and treating oxidation tail gas discharged from the top of an oxidation tower, and a device (shown in figure 2) used by the method comprises an oxidation tower 1 (phi 4200X45465 units are mm), an oxidation tail gas heat exchanger 2 (phi 1800X8553 units are mm), an oxidation tail gas separator A3 (phi 1300X3870 units are mm), an oxidation tail gas separator B4 (phi 1300X3870 units are mm), an oxidation tail gas water cooler 5 (phi 1500X8060 units are mm), an expansion unit 6, carbon fibers 7, a carbon fiber vent pipe 8, a centrifugal fan 31, a waste water separation tank 32, a waste water separation pump 33 and the like. Heavy aromatic hydrocarbons in the oxidation tail gas discharged from the top of the oxidation tower are condensed and separated by an oxidation tail gas heat exchanger, an oxidation tail gas separator, an oxidation tail gas water cooler and an expansion unit, and then are sent to a boiler for incineration by a centrifugal fan after being adsorbed by carbon fibers, and carbon dioxide and water are generated after complete incineration, so that the oxidation tail gas reaches the standard and is discharged. In the carbon fiber regeneration desorption process, part of water vapor is taken away by oxidized tail gas, so that a wastewater separation tank is arranged before the oxidized tail gas enters a boiler, and condensed water enters the wastewater separation tank and is pumped into a sewage pool through a wastewater separation pump.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A waste gas collecting and treating system in a hydrogen peroxide production process is characterized in that: the method comprises the following steps:
the oxidation tower provides a place for producing hydrogen peroxide;
the oxidized tail gas heat exchanger comprises a cold fluid channel and a hot fluid channel, and an inlet of the hot fluid channel is connected with a tail gas outlet of the oxidation tower;
an inlet of the oxidation tail gas separator A is connected with an outlet of the hot fluid channel;
the inlet of the oxidized tail gas water cooler is connected with the outlet of the oxidized tail gas separator A, and the outlet of the oxidized tail gas water cooler is connected with the inlet of a cold fluid channel of the oxidized tail gas heat exchanger through the oxidized tail gas separator B;
an inlet of the expansion unit is connected with an outlet of a cold fluid channel of the oxidized tail gas heat exchanger;
the inlet of the carbon fiber adsorption device is connected with the outlet of the expansion unit;
and the inlet of the carbon fiber emptying pipe is connected with the outlet of the carbon fiber adsorption device, and the outlet of the carbon fiber emptying pipe is connected with the boiler through a centrifugal fan.
2. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: still include the waste water knockout drum, the waste water knockout drum communicates with the connecting tube between centrifugal fan and the boiler.
3. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the device also comprises an extraction raffinate separator which is communicated with the centrifugal fan.
4. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 3, is characterized in that: the raffinate separator is communicated with a centrifugal fan through an emptying cooler.
5. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the system also comprises an acidic waste working solution storage tank which is communicated with the centrifugal fan.
6. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the alkaline waste working solution storage tank is communicated with the centrifugal fan.
7. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the centrifugal fan is communicated with the centrifugal fan.
8. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the circulating working solution storage tank is connected with the centrifugal fan through an emptying condenser and an activated carbon tank.
9. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 1, characterized in that: the clay bed is connected with a centrifugal fan.
10. The system for collecting and treating the waste gas in the hydrogen peroxide production process according to claim 9, is characterized in that: the clay bed is connected with a centrifugal fan through an activated carbon tank.
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| CN202021898053.7U CN213589751U (en) | 2020-09-02 | 2020-09-02 | Waste gas collecting and treating system in hydrogen peroxide production process |
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| CN202021898053.7U CN213589751U (en) | 2020-09-02 | 2020-09-02 | Waste gas collecting and treating system in hydrogen peroxide production process |
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