CN110779038A - System for recycling waste gas of radioactive organic waste steam reforming device - Google Patents
System for recycling waste gas of radioactive organic waste steam reforming device Download PDFInfo
- Publication number
- CN110779038A CN110779038A CN201911166944.5A CN201911166944A CN110779038A CN 110779038 A CN110779038 A CN 110779038A CN 201911166944 A CN201911166944 A CN 201911166944A CN 110779038 A CN110779038 A CN 110779038A
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- Prior art keywords
- air
- communicated
- heat exchanger
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- air inlet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a system for recycling waste gas of a radioactive organic waste steam reforming device, which comprises a first heat exchanger communicated with high-temperature waste gas; the air inlet end of the first heat exchanger is respectively communicated with the waste gas inlet pipe and the first air blower; the air inlet end of the first blower is communicated with a first air inlet pipe; the air outlet end of the first heat exchanger is respectively communicated with the full-oxidation furnace and the cache tank; the full oxidation furnace is communicated with the cache tank through a second induced draft fan; a second air inlet pipe is led out of a pipeline between the full-oxidation furnace and the cache tank, and is sequentially provided with a flow sensor and a second regulating valve; the air outlet end of the full-oxidation furnace is communicated with the air inlet end of the second heat exchanger, and the air inlet end of the second heat exchanger is also communicated with a second air blower; the air outlet end of the second heat exchanger is communicated with the cache tank and the first induced draft fan respectively, and the air outlet end of the first induced draft fan is communicated with the atmosphere.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to a waste gas recycling system of a radioactive organic waste steam reforming device.
Background
The nuclear power plant has high emission requirements on waste solids, waste liquid and waste gas, particularly the waste solids, the waste liquid and the waste gas after being irradiated, the waste is treated and then discharged in a special treatment center, the waste gas emission is also faced in the steam reforming technology, organic waste resin is decomposed into inorganic matters and organic compounds through a series of treatment processes, the inorganic matters determine the yield due to the characteristics of the waste resin, and the waste gas comprises the organic compounds, secondary combustion waste gas, combustion-supporting air, heat exchange air and the like in the treatment process, so that the waste gas quantity is large, the waste generated by the treated waste gas is large when the waste gas quantity is large, and the treatment cost is greatly increased.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned problems in the prior art and providing a system for recycling exhaust gas of a steam reforming device for radioactive organic waste, which solves or improves the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that:
a system for recycling waste gas of a radioactive organic waste steam reforming device comprises a first heat exchanger communicated with high-temperature waste gas; the air inlet end of the first heat exchanger is respectively communicated with the waste gas inlet pipe and the first air blower; the air inlet end of the first blower is communicated with a first air inlet pipe; the air outlet end of the first heat exchanger is respectively communicated with the full-oxidation furnace and the cache tank; the full oxidation furnace is communicated with the cache tank through a second induced draft fan; a second air inlet pipe is led out of a pipeline between the full-oxidation furnace and the cache tank, and is sequentially provided with a flow sensor and a second regulating valve; the air outlet end of the full-oxidation furnace is communicated with the air inlet end of the second heat exchanger, and the air inlet end of the second heat exchanger is also communicated with a second air blower; the air outlet end of the second heat exchanger is communicated with the cache tank and the first induced draft fan respectively, and the air outlet end of the first induced draft fan is communicated with the atmosphere.
Preferably, a first regulating valve is installed on a pipeline between the full oxidation furnace and the buffer tank.
Preferably, the flow sensor is a model LWQ gas vortex shedding flowmeter.
Preferably, the second blower is in communication with the third air intake duct.
Preferably, the first and second blowers are 2PB-7530-H27 high pressure blowers.
Preferably, the first induced draft fan and the second induced draft fan are JXP355 high temperature resistant induced draft fans.
The system for recycling the waste gas of the radioactive organic waste steam reforming device provided by the invention has the following beneficial effects:
the high-temperature waste gas is firstly introduced into a first heat exchanger for heat exchange, the waste heat of the heat exchange is stored in a cache tank through gas, meanwhile, the gas exhausted from a full-oxidation furnace is introduced into a second heat exchanger, and the rest heat is stored in the cache tank; and the waste heat in the buffer tank is used as combustion-supporting air for the full-oxidation furnace, and the waste heat flue gas is converted into combustion-supporting air so as to achieve the purpose of reducing the flue gas quantity.
Drawings
FIG. 1 is a block diagram showing the construction of an exhaust gas recycling system for a steam reforming apparatus for radioactive organic wastes.
1. A first heat exchanger; 2. a total oxidation furnace; 3. a second heat exchanger; 4. a first induced draft fan; 5. a first blower; 6. a buffer tank; 7. a second induced draft fan; 8. a second blower; 9. an exhaust gas inlet pipe; 10. a first air intake duct; 11. a first regulating valve; 12. a flow sensor; 13. a second regulating valve; 14. a second air intake duct; 15. a third air intake duct.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to an embodiment of the present application, referring to fig. 1, the system for recycling exhaust gas of a radioactive organic waste steam reforming device according to the present embodiment includes a first heat exchanger 1 and a second heat exchanger 3. Wherein, first heat exchanger 1 is used for carrying out the heat exchange to high temperature waste gas, and second heat exchanger 3 is used for carrying out the heat exchange to the high temperature gas of full oxidation furnace 2 tail gas export section.
The temperature of the steam reforming gas is above 700 ℃, the gas is purified at high temperature, high requirements on the high temperature resistance of equipment are necessarily required, and the influences on the purchase and manufacturing cost increase of the equipment, the service life of the equipment and the like are great.
The inlet end of the first heat exchanger 1 is respectively communicated with the waste gas inlet pipe 9 and the first air blower 5, the inlet end of the first air blower 5 is communicated with the first air inlet pipe 10, and the outlet end of the first heat exchanger 1 is respectively communicated with the full-oxidation furnace 2 and the buffer tank 6.
The first air blower 5 introduces air into the first heat exchanger 1 from a first air inlet pipe 10, exchanges heat with high-temperature waste gas, and introduces the gas after heat exchange into the buffer tank 6 for storage.
Through second draught fan 7 intercommunication between full oxidation furnace 2 and the buffer tank 6, install first governing valve 11 on the pipeline between full oxidation furnace 2 and the buffer tank 6, second draught fan 7 and the cooperation of first governing valve 11 can realize the quantitative surplus hot gas that provides in to full oxidation furnace 2.
A second air inlet pipe 14 is led out from the pipeline between the total oxidation furnace 2 and the buffer tank 6, and a flow sensor 12 and a second regulating valve 13 are sequentially installed on the second air inlet pipe 14.
The second air inlet pipe 14 is matched with the flow sensor 12 and the second regulating valve 13, and the main purpose of the second air inlet pipe is to supplement extra air when the air quantity of the buffer tank 6 is not enough to meet the air supply quantity of the full-oxidation furnace 2, so that the air supplementing function is realized through flow regulation on a branch.
The full oxidation furnace 2 gives vent to anger the end and communicates with the 3 inlet ends of second heat exchanger, and the 3 inlet ends of second heat exchanger still communicate with second air-blower 8, and the 3 end of giving vent to anger of second heat exchanger communicates with buffer tank 6 and first draught fan 4 respectively, and the first draught fan 4 is given vent to anger the end and is communicate with the atmosphere.
High-temperature gas at the air outlet of the full-oxidation furnace 2 is introduced into the second heat exchanger 3, and heat in a pipeline is brought into the cache tank 6 along with air through the heat exchange sheets for storage; meanwhile, the residual heat gas in the buffer tank 6 is used as combustion-supporting air for the full-oxidation furnace 2, and the residual heat flue gas is converted into combustion-supporting air so as to achieve the purpose of reducing the flue gas volume.
In addition, a third air intake duct 15 is provided in cooperation with the second blower 8 to introduce air into the second heat exchanger 3 for heat exchange.
Wherein, the first regulating valve 11 and the second regulating valve 13 are both electronic single-seat regulating valves LDZDL;
the flow sensor 12 is a model LWQ gas vortex shedding flowmeter.
The second blower 8 communicates with a third air intake duct 15.
The first blower 5 and the second blower 8 are 2PB-7530-H27 high pressure blowers.
The first induced draft fan 4 and the second induced draft fan 7 are JXP355 high temperature resistant induced draft fans.
Because the high-temperature organic mixed gas in the pipeline is provided with certain radioactive substances, the high-temperature organic mixed gas is polluted when cooling air is cooled, the high-temperature organic mixed gas cannot be directly discharged to the atmosphere, the high-temperature organic mixed gas can be discharged by a gas purifying party, the high-temperature gas cooling requirement also exists at the tail gas outlet section of the full-oxidation furnace 2 in the same way, and the cooling air volume of the two parts is about 25 percent of the total smoke volume. In addition, combustion air and cooling air are required during the secondary combustion of the total oxidation furnace 2, and are discharged together in a waste gas manner after combustion, which is the largest place for generating the flue gas volume of the whole system.
Therefore, the invention recycles the air after heat exchange, leads the hot air to the total oxidation furnace 2 through a pipeline to be used as combustion-supporting air, and converts 25 percent of flue gas into 25 percent of combustion-supporting air so as to achieve the aim of reducing the flue gas quantity.
Air is blown into the first heat exchanger 1 through the first air blower 5, the air enters the heat exchanger, heat in a pipeline is taken away along with the air through the heat exchange fins, the cooling process is realized, meanwhile, normal-temperature air is changed into hot air, and the hot air enters the cache tank 6; at the same time, the hot air of the second heat exchanger 3 is brought into the buffer tank 6.
Buffer memory jar 6 sets up an export and 2 air intakes of full oxidation furnace intercommunication, and the centre is introduced full oxidation furnace 2 with buffer memory jar 6 hot-air through second draught fan 7, and the induced air mouth sets up a branch road and atmosphere intercommunication, sets up flow sensing ware and second governing valve 13 on the branch road, and the main objective is when buffer memory jar 6 air quantity is not enough to satisfy full oxidation furnace 2's air supply quantity, needs supplementary extra air, so realize the tonifying qi function through flow control on the branch road. The heat exchange air quantity can be effectively utilized, and the external air quantity is reduced.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (6)
1. A system for realizing the recycling of waste gas of a radioactive organic waste steam reforming device is characterized in that: the system comprises a first heat exchanger communicated with high-temperature waste gas; the air inlet end of the first heat exchanger is respectively communicated with the waste gas inlet pipe and the first air blower; the air inlet end of the first air blower is communicated with a first air inlet pipe; the air outlet end of the first heat exchanger is respectively communicated with the full-oxidation furnace and the cache tank; the full oxidation furnace is communicated with the cache tank through a second induced draft fan; a second air inlet pipe is led out of a pipeline between the full-oxidation furnace and the cache tank, and is sequentially provided with a flow sensor and a second regulating valve; the air outlet end of the full-oxidation furnace is communicated with the air inlet end of the second heat exchanger, and the air inlet end of the second heat exchanger is also communicated with a second air blower; the second heat exchanger is given vent to anger the end and is communicate with buffer tank and first draught fan respectively, and the first draught fan is given vent to anger the end and is communicate with the atmosphere.
2. The system for recycling exhaust gas from a steam reformer for radioactive organic waste according to claim 1, wherein: and a first regulating valve is arranged on a pipeline between the full-oxidation furnace and the buffer tank.
3. The system for recycling exhaust gas from a steam reformer for radioactive organic waste according to claim 1, wherein: the flow sensor is an LWQ type gas vortex shedding flowmeter.
4. The system for recycling exhaust gas from a steam reformer for radioactive organic waste according to claim 1, wherein: the second blower is in communication with a third air intake duct.
5. The system for recycling exhaust gas from a steam reformer for radioactive organic waste according to claim 1, wherein: the first blower and the second blower are 2PB-7530-H27 high-pressure blowers.
6. The system for recycling exhaust gas from a steam reformer for radioactive organic waste according to claim 1, wherein: the first induced draft fan and the second induced draft fan are JXP355 high-temperature resistant induced draft fans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911166944.5A CN110779038A (en) | 2019-11-25 | 2019-11-25 | System for recycling waste gas of radioactive organic waste steam reforming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911166944.5A CN110779038A (en) | 2019-11-25 | 2019-11-25 | System for recycling waste gas of radioactive organic waste steam reforming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110779038A true CN110779038A (en) | 2020-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911166944.5A Pending CN110779038A (en) | 2019-11-25 | 2019-11-25 | System for recycling waste gas of radioactive organic waste steam reforming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110779038A (en) |
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2019
- 2019-11-25 CN CN201911166944.5A patent/CN110779038A/en active Pending
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