CN212250165U - Supercritical water oxidation system for tail gas power generation - Google Patents
Supercritical water oxidation system for tail gas power generation Download PDFInfo
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- CN212250165U CN212250165U CN202020629509.3U CN202020629509U CN212250165U CN 212250165 U CN212250165 U CN 212250165U CN 202020629509 U CN202020629509 U CN 202020629509U CN 212250165 U CN212250165 U CN 212250165U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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Abstract
The utility model provides a supercritical water oxidation system of tail gas power generation belongs to tail gas treatment technical field, including the anti-supercritical water oxidationThe system comprises a reactor, a gas-liquid separator, a combustion heater, a steam flash tank, a steam power generation device and a tail water power generation device; the supercritical water oxidation reactor is communicated with the gas-liquid separator through a pipeline; the gas-liquid separator is respectively communicated with the steam flash tank and the combustion heater through pipelines; the steam flash tank is respectively communicated with the steam power generation device, the tail water power generation device and the combustion heater through pipelines. The system provided by the utility model converts CO into CO2The problem of CO discharge is avoided, the waste heat of the steam and the tail water is utilized to generate power, energy is saved, consumption is reduced, and the operation cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of tail gas treatment, more specifically say, relate to a supercritical water oxidation system of tail gas electricity generation.
Background
Supercritical Water (SCW) refers to Water in a special state having a temperature and pressure higher than its critical point (T ═ 374.15 ℃, P ═ 22.12 MPa). The SCWO (Supercritical Water Oxidation) technology is a technology capable of realizing deep Oxidation treatment on various organic wastes, completely dissolving an oxidant and organic matters in Supercritical Water by utilizing the unique physical and chemical properties of the Supercritical Water, taking the Supercritical Water as a reaction medium, and quickly and thoroughly converting the organic matters into clean CO through homogeneous Oxidation reaction2、H2O、N2And other harmless small molecules, S, P and the like are converted into the most stable salts, and heavy metals are stabilized by oxidation and exist in the ash in a solid phase.
When the supercritical water oxidation reactor is in normal operation, the gas-phase reaction product is CO2、H2O, etc., but in case of a change in the conditions (e.g., a slag discharge stage, a different material switching stage, etc.), the gas-phase reaction product may generate a certain amount of CO gas due to insufficient reaction of free oxygen and free carbon in the reactor. However, CO gas is toxic and prohibited from being released to the atmosphere at will. Therefore, the supercritical water oxidation reactor needs to be optimized and improved to solve the problem of CO gas generation under special working conditions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a supercritical water oxidation system of tail gas power generation, when aiming at solving the operating mode change, supercritical water oxidation system can produce the problem of CO the short time.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a supercritical water oxidation system for tail gas power generation, comprising: the system comprises a supercritical water oxidation reactor, a gas-liquid separator, a combustion heater, a steam flash tank, a steam power generation device and a tail water power generation device;
the supercritical water oxidation reactor is communicated with the gas-liquid separator through a pipeline;
the gas-liquid separator is communicated with the combustion heater to convey separated gas, the gas-liquid separator is communicated with the steam flash tank to convey separated liquid, and a tail gas analysis device is arranged on a pipeline between the gas-liquid separator and the combustion heater;
the combustion heater is connected with the steam flash tank through a pipeline and provides secondary steam for the steam flash tank;
the steam flash tank is respectively communicated with the steam power generation device and the tail water power generation device through pipelines.
As another embodiment of the utility model, still include circulating water system, through the pipeline respectively with steam power generation facility, tail water power generation facility and supercritical water oxidation reactor intercommunication are used for supercritical water oxidation reactor, reduce cost with circulating water and the comdenstion water in steam power generation facility and the tail water power generation facility behind circulating water system pressurization treatment.
As another embodiment of the present invention, an automatic control valve is disposed between the tail gas analyzer and the combustion heater for conveying the CO-containing gas to the combustion heater.
As another embodiment of the present invention, the supercritical water oxidation reactor and the first pressure reduction device are disposed on the pipeline between the gas-liquid separators, and the reaction liquid output by the supercritical water oxidation reactor is reduced to 7.1 MPa-6.0 MPa, thereby facilitating the subsequent gas-liquid separation.
As another embodiment of the utility model, the vapour and liquid separator with be equipped with second pressure reduction means on the pipeline between the steam flash tank, reduce the liquid phase that the vapour and liquid separator separated to 0.3MPa ~ 0.6MPa, be convenient for get into the steam flash tank and carry out the flash distillation.
As another embodiment of the utility model, the vapour and liquid separator with be equipped with gaseous pressure relief device on the pipeline between the tail gas analytical equipment, reduce gained high-pressure gas to low-pressure gas and keep export gaseous pressure and flow stability unchangeable, the tail gas analytical equipment's of being convenient for detection and the burning of entering combustion heater.
As another embodiment of the present invention, a gas pressurizing device is disposed on the pipeline between the steam flash tank and the steam power generation device, and the pressurized steam is transported to the steam power generation device for power generation.
As another embodiment of the present invention, the steam flash tank and the tail water delivery pump are disposed on the pipeline between the tail water power generation devices, and the obtained tail water is delivered to the tail water power generation devices, and the tail water waste heat is utilized for power generation.
As another embodiment of the present invention, the steam flash tank and the pipeline between the combustion heaters are provided with an evaporated liquid delivery pump, which delivers the liquid phase in the steam flash tank to the combustion heaters, and the combustion heat containing CO gas is used for heating the liquid phase in the steam flash tank.
As another embodiment of the utility model, the combustion heater is communicated with a gas pipeline and used for introducing gas and starting the combustion heater.
As another embodiment of the present invention, the combustion heater is provided with CO2An exhaust line for discharging CO after combustion2And the steam power generation device is provided with a non-condensable gas discharge pipeline for discharging low-temperature non-condensable gas.
The utility model provides a supercritical water oxidation system of tail gas power generation's beneficial effect lies in: compared with the prior art, the utility model discloses tail gas power generation's supercritical water oxidation system. Gas components discharged by the gas-liquid separator are monitored by the tail gas analysis device, so that when CO is detected, an operator can be reminded to convey a gas phase containing CO to the combustion heater, and the CO is converted into CO2And is discharged to the atmosphere, thereby avoiding the problem of CO discharge, simultaneously using the heat of combustion for heating the liquid in the steam flash tank to convert into water vapor, andthe waste heat of the water vapor and the tail water is respectively utilized for power generation, the residual energy in the system is fully utilized, the energy is saved, the consumption is reduced, and the operation cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of a connection structure of a supercritical water oxidation system for tail gas power generation according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection structure of a supercritical water oxidation system for tail gas power generation according to an embodiment of the present invention;
in the figure: 10. a supercritical water oxidation reactor; 11. a first voltage reduction device; 20. a gas-liquid separator; 21. a second voltage reduction device; 22. a gas pressure reduction device; 30. a combustion heater; 31. an automatic control valve; 32. a gas line; 40. a steam flash tank; 41. a gas pressurizing device; 42. a tail water delivery pump; 43. an evaporated liquid delivery pump; 50. a steam power generation device; 60. a tail water power generation device; 70. a tail gas analysis device; 80. a circulating water system.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, a supercritical water oxidation system for tail gas power generation according to the present invention will now be described. The supercritical water oxidation system for generating the tail gas comprises a supercritical water oxidation reactor 10, a gas-liquid separator 20, a combustion heater 30, a steam flash tank 40, a steam power generation device 50 and a tail water power generation device 60; the supercritical water oxidation reactor 10 is communicated with a gas-liquid separator 20 through a pipeline; the gas-liquid separator 20 is respectively communicated with the combustion heater 30 and the steam flash tank 40 through pipelines, the gas-liquid separator 20 is communicated with the combustion heater 30 to convey separated gas, the gas-liquid separator 20 is communicated with the steam flash tank 40 to convey separated liquid, and a tail gas analysis device 70 is arranged on the pipeline between the gas-liquid separator 20 and the combustion heater 30; the fired heater 30 is connected by a line to the steam flash tank 40 to provide heat to the steam flash tank 40; the steam flash tank 40 is in communication with the steam power plant 50 and the tailwater power plant 60, respectively, via lines.
The utility model provides a supercritical water oxidation system of tail gas power generation compares with prior art, is monitored by gas-liquid separator 20 combustion gas composition through tail gas analytical equipment 70 to when detecting CO, can remind the operator to carry the gaseous phase that will contain CO to combustion heater 30 burning, make CO turn into CO2And the heat of combustion is used for heating liquid in the steam flash tank 40 and converting the liquid into steam, and the waste heat of the steam and tail water are respectively utilized for power generation, so that the residual energy in the system is fully utilized, the energy is saved, the consumption is reduced, and the operation cost is reduced.
As a specific implementation manner of the supercritical water oxidation system of tail gas power generation, please refer to fig. 2, still include circulating water system 80, communicate with steam power generation device 50, tail water power generation device 60 and supercritical water oxidation reactor 10 respectively through the pipeline, circulating water system 80 is arranged in retrieving circulating water and the comdenstion water among steam power generation device and the tail water power generation device, carries to supercritical water oxidation reactor 10 well cycle after circulating water system 80 pressurization processing and uses, reduce cost.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, an automatic control valve 31 is disposed between the tail gas analyzer 70 and the combustion heater 30 for delivering the CO-containing gas to the combustion heater, the tail gas analyzer 70 monitors the gas components discharged from the gas-liquid separator 20, when CO is detected, a signal is transmitted to the automatic control valve 31, the automatic control valve 31 opens the pipeline from the gas-liquid separator 20 to the combustion heater 30, and the CO-containing gas is delivered to the combustion heater 30; when no CO is detected, the tail gas analysis device 70 transmits a signal to the automatic control valve 31, the automatic control valve 31 opens a pipeline from the gas-liquid separator 20 to the atmosphere, and the gas is directly discharged outside.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, a first pressure reduction device 11 is disposed on the pipeline between the supercritical water oxidation reactor 10 and the gas-liquid separator 20, the first pressure reduction device 11 is a pipeline pressure reduction device or a throttling pressure reduction device, and the liquid output by the supercritical water oxidation reactor 10 is reduced to 7.1 MPa-6.0 MPa, so as to facilitate subsequent gas-liquid separation.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, the second pressure reduction device 21 is disposed on the pipeline between the gas-liquid separator 20 and the steam flash tank 40, the second pressure reduction device 21 is a pipeline pressure reduction device or a throttling pressure reduction device, and the liquid phase separated by the gas-liquid separator 20 is reduced to 0.3 MPa-0.6 MPa, so as to enter the steam flash tank 40 for flash evaporation.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, a gas pressure reducing device 22, such as a gas pressure reducing valve, is disposed on the pipeline between the gas-liquid separator 20 and the tail gas analyzer 70, and reduces the obtained high-pressure gas into low-pressure gas and keeps the pressure and flow of the output gas stable, so that the gas can enter the tail gas analyzer 70 for detection and enter the combustion heater 30 for combustion.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, a gas pressurizing device 41, such as a gas pressurizing pump, is disposed on the pipeline between the steam flash tank 40 and the steam power generation device 50, and pressurizes the steam and then delivers the pressurized steam to the steam power generation device 50 for power generation.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, a tail water delivery pump 42 is disposed on the pipeline between the steam flash tank 40 and the tail water power generation device 60, and delivers the obtained tail water to the tail water power generation device 60, and the tail water waste heat is utilized to generate power.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 2, an evaporation liquid delivery pump 43 is disposed on the pipeline between the steam flash tank 40 and the combustion heater 30, so as to deliver the liquid phase in the steam flash tank to the combustion heater 30, heat the liquid phase in the steam flash tank 40 by using the combustion heat of the CO-containing gas, and then deliver the obtained secondary steam back to the steam flash tank 40.
Referring to fig. 2, the combustion heater 30 is connected to a gas pipeline 32 for introducing gas to start the combustion heater 30.
As a specific implementation manner of the embodiment of the utility model, the combustion heater is provided with CO2An exhaust line for discharging CO after combustion2The steam power generation device is provided with a non-condensable gas discharge pipeline for discharging low-temperature non-condensable gas.
In this embodiment, the steam power generation device and/or the tail water power generation device are electrically connected to the gas pressurization device, the tail water delivery pump, and the evaporated liquid delivery pump, respectively, to provide electric energy.
The specific operation process of the supercritical water oxidation system for tail gas power generation in the embodiment is as follows:
s1, gradually heating a supercritical water oxidation reactor to 200-360 ℃, and boosting the pressure to 18-22 MPa;
s2, starting an evaporation liquid delivery pump, introducing gas into a gas pipeline after the evaporation liquid delivery pump operates for 3-5 minutes, and starting a combustion heater;
s3, the steam power generation device is gradually put into use according to the steam flow, and the tail water power generation device is gradually put into use according to the tail water flow;
s4, when the supercritical water oxidation reactor reaches an ignition condition (the temperature is 330-370 ℃, and the pressure is 18-22 MPa), oxygen and fuel enter the reactor at the same time, and the reactor is waited to react to a supercritical stable state;
s5, adjusting the proportion of oxygen and fuel, and ensuring that the CO component in a high-pressure gas-phase pipeline between the gas-liquid separator and the tail gas analysis device reaches the following indexes: o is2Less than 8-10% of CO2Less than 7% and CO more than 76% because the gas is burnt in the combustion heater and the temperature isFully burning CO in a high-pressure gas phase pipeline into CO at the temperature of 500-800 DEG C2Through CO2The discharge pipeline is discharged to the atmosphere;
s6, gradually increasing the proportion of oxygen and fuel to full load;
s7, closing a gas pipeline;
and S8, after the driving stage of the supercritical water oxidation system is finished, entering a stable operation stage.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Supercritical water oxidation system of tail gas power generation, its characterized in that includes: the system comprises a supercritical water oxidation reactor, a gas-liquid separator, a combustion heater, a steam flash tank, a steam power generation device and a tail water power generation device;
the supercritical water oxidation reactor is communicated with the gas-liquid separator through a pipeline;
the gas-liquid separator is communicated with the combustion heater to convey separated gas, the gas-liquid separator is communicated with the steam flash tank to convey separated liquid, and a tail gas analysis device is arranged on a pipeline between the gas-liquid separator and the combustion heater;
the combustion heater is connected with the steam flash tank through a pipeline and provides secondary steam for the steam flash tank;
the steam flash tank is respectively communicated with the steam power generation device and the tail water power generation device through pipelines.
2. The supercritical water oxidation system for tail gas power generation according to claim 1, further comprising a circulating water system in communication with the steam power generation device, the tail water power generation device and the supercritical water oxidation reactor through pipelines, respectively, for circulating water and condensed water in the steam power generation device, the tail water power generation device to the supercritical water oxidation reactor.
3. The supercritical water oxidation system for tail gas power generation according to claim 1, wherein an automatic control valve is provided between the tail gas analysis device and the combustion heater for delivering the CO-containing gas to the combustion heater.
4. The supercritical water oxidation system for tail gas power generation of claim 1, wherein a first pressure reduction device is disposed on the pipeline between the supercritical water oxidation reactor and the gas-liquid separator.
5. The supercritical water oxidation system for off-gas power generation according to claim 4, wherein a second pressure reduction device is provided on the pipeline between the gas-liquid separator and the steam flash tank.
6. The supercritical water oxidation system for tail gas power generation according to claim 1, wherein a gas pressure reduction device is provided on the pipeline between the gas-liquid separator and the tail gas analysis device.
7. The supercritical water oxidation system for tail gas power generation of claim 1 where a gas pressure boosting device is provided on the pipeline between the steam flash tank and the steam power plant.
8. The supercritical water oxidation system for tail gas power generation of claim 1 wherein a tail water transfer pump is provided on the pipeline between the steam flash tank and the tail water power generation plant.
9. The supercritical water oxidation system for tail gas power generation according to claim 1, wherein an evaporated liquid transfer pump is provided on the pipeline between the steam flash tank and the combustion heater.
10. The supercritical water oxidation system for tail gas power generation according to any one of claims 1 to 9, where the combustion heater is in communication with a gas line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020629509.3U CN212250165U (en) | 2020-04-23 | 2020-04-23 | Supercritical water oxidation system for tail gas power generation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020629509.3U CN212250165U (en) | 2020-04-23 | 2020-04-23 | Supercritical water oxidation system for tail gas power generation |
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| CN212250165U true CN212250165U (en) | 2020-12-29 |
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| CN202020629509.3U Active CN212250165U (en) | 2020-04-23 | 2020-04-23 | Supercritical water oxidation system for tail gas power generation |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220105 Address after: 065000 east of Fuyou Road, north of Xiarong road and west of Furao Road, Longhe economic and Technological Development Zone, anci District, Langfang City, Hebei Province Patentee after: LANGFANG XIN'AO LONGHE ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Address before: 065001 New Austrian Science Park D Building, 118 Huaxiang Road, Langfang Development Zone, Hebei Province Patentee before: Xindi Environmental Protection Technology Co.,Ltd. |
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