CN211232906U - Steam supply and exhaust gas purification system of steam reforming device - Google Patents
Steam supply and exhaust gas purification system of steam reforming device Download PDFInfo
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- CN211232906U CN211232906U CN201922057421.9U CN201922057421U CN211232906U CN 211232906 U CN211232906 U CN 211232906U CN 201922057421 U CN201922057421 U CN 201922057421U CN 211232906 U CN211232906 U CN 211232906U
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- 238000000746 purification Methods 0.000 title claims abstract description 18
- 238000000629 steam reforming Methods 0.000 title abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000002699 waste material Substances 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000002912 waste gas Substances 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 33
- 238000000926 separation method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010815 organic waste Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002901 radioactive waste Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a steam supply and waste gas purification system of a steam reforming device, which comprises a fluidized bed; the inlet end of the fluidized bed is sequentially communicated with a steam superheater and a steam generator, and an exhaust valve, a safety valve and a regulating valve are sequentially arranged on pipelines at the inlet ends of the steam superheater and the fluidized bed; the steam generator is sequentially communicated with the water storage tank and the pure water equipment through the constant delivery pump; the outlet end of the fluidized bed is communicated with the cyclone separator through a pipeline; the cyclone separator is communicated with the high-temperature filter; the cyclone separator and the high-temperature filter are both communicated with the waste solid collector; the high-temperature filter is communicated with the total oxidation furnace, the spray tower and the gas-liquid separator in sequence; a spray head for performing alkaline washing is arranged in the spray tower; the gas-liquid separator is communicated with the vacuum pump and the chimney in sequence.
Description
Technical Field
The utility model belongs to the technical field of steam reformer, concretely relates to steam reformer's steam supply and exhaust gas purification system.
Background
As a fluidized bed for pyrolysis, generally, heated air is adopted as a main heat conduction medium, but the method has certain defects that impurities are easily brought into the air, the impurities still exist even through filtering, the influence on the fluidized reaction is great, simultaneously, the air quantity is increased, the exhaust gas treatment capacity at the rear end is increased, and the energy efficiency is increased. The steam reforming device is applied to the treatment of nuclear power organic waste, radioactive substances exist in the system, and the later cleaning and replacement are very difficult.
Meanwhile, the steam reforming technology eventually collects inorganic substances and discharges organic compounds through purification. The flue gas is transported with inorganic substances towards the end, which are not allowed to be discharged to the atmosphere from the nuclear safety point of view, since they contain radioactivity, and thus need to be intercepted and collected in the process. Since steam reforming is a new technology, there is no successful process for cleaning equipment to reference at present.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a steam supply and exhaust gas purification system for a steam reformer, which can solve or improve the above-mentioned problems.
In order to achieve the purpose, the utility model adopts the technical proposal that:
a steam supply and exhaust gas purification system of a steam reformer, comprising a fluidized bed; the inlet end of the fluidized bed is sequentially communicated with a steam superheater and a steam generator, and an exhaust valve, a safety valve and a regulating valve are sequentially arranged on pipelines at the inlet ends of the steam superheater and the fluidized bed; the steam generator is sequentially communicated with the water storage tank and the pure water equipment through the constant delivery pump;
the outlet end of the fluidized bed is communicated with the cyclone separator through a pipeline; the cyclone separator is communicated with the high-temperature filter; the cyclone separator and the high-temperature filter are both communicated with the waste solid collector; the high-temperature filter is communicated with the total oxidation furnace, the spray tower and the gas-liquid separator in sequence; a spray head for performing alkaline washing is arranged in the spray tower; the gas-liquid separator is communicated with the vacuum pump and the chimney in sequence.
Preferably, the regulating valves are arranged on a pipeline between the pure water device and the water storage tank, a pipeline between the water storage tank and the dosing pump, and a pipeline between the dosing pump and the steam generator.
Preferably, the cyclone is in communication with the waste solids collector via a first waste solids collection conduit.
Preferably, the high temperature filter is in communication with the waste solids collector via a second waste solids collection conduit.
Preferably, the gas-liquid separator returns the liquid to the spray tower through the second waste liquid collecting pipe; the spray tower recovers liquid through the first waste liquid collecting pipe.
The utility model provides a steam reformer's steam supply and exhaust gas purification system has following beneficial effect:
the utility model discloses at the entry end of fluidized bed, through the cooperation of pure water equipment, steam generator and steam superheater, solved in the useless resin steam reforming technique of radioactivity impurity that the high temperature fluidization heat-transfer medium of fluidized bed brought influence the many reaction of reacting, tail gas production volume is big and the production of incrustation scale is unfavorable for the maintenance scheduling problem in later stage in the operation.
Meanwhile, the utility model, at the outlet end of the fluidized bed, passes the waste gas in the fluidized bed through the cyclone separator and the high temperature filter in turn, and removes and intercepts most inorganic substances, fine particles and ash fly in the waste gas; and the residual gas is sequentially led into a total oxidation furnace, a spray tower and a gas-liquid separator, the residual small amount of inorganic matters and organic compounds are subjected to high-temperature combustion, the burnt tail gas is subjected to alkali cleaning, and the gas is purified again in a spraying mode, so that the purification of the gas of the radioactive organic waste steam reforming device is realized.
The utility model discloses a structure setting and cooperation at the entry end of fluidized bed and exhaust end (exit end), reduced the production of incrustation scale in the operation, reduced tail gas production volume to improve the purification of tail gas (waste gas), had stronger practicality.
Drawings
Fig. 1 is a block diagram showing the structure of a steam supply and exhaust gas purification system of a steam reformer.
1. A fluidized bed; 2. a cyclone separator; 3. a high temperature filter; 4. a total oxidation furnace; 5. a waste solids collector; 6. a spray tower; 7. a gas-liquid separator; 8. a vacuum pump; 9. a chimney; 10. a first spent solids collection tube; 11. a second waste solids collection tube; 12. a second waste liquid collecting pipe; 13. a first waste liquid collecting pipe; 14. a water purification device; 15. adjusting a valve; 16. a water storage tank; 17. a constant delivery pump; 18. a steam generator; 19. a steam superheater; 20. a safety valve; 21. and an evacuation valve.
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 various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.
According to an embodiment of the present application, referring to fig. 1, the steam supply and exhaust gas purification system of the steam reformer of the present embodiment comprises a fluidized bed 1, wherein an inlet end of the fluidized bed 1 is sequentially communicated with a steam superheater 19 and a steam generator 18, and an exhaust valve 21, a safety valve 20 and a regulating valve 15 are sequentially arranged on a pipeline at the inlet end of the steam superheater 19 and the fluidized bed; the steam generator 18 is in turn in communication with the water storage tank 16 and the pure water device 14 via a dosing pump 17.
Regulating valves 15 are arranged on a pipeline between the pure water device 14 and the water storage tank 16, a pipeline between the water storage tank 16 and the fixed displacement pump 17, and a pipeline between the fixed displacement pump 17 and the steam generator 18.
Wherein, the water in the pure water device 14 is treated by pretreatment, reverse osmosis technology, mixed bed and EDI device, etc., and the conductive medium in the water is almost completely removed, and the colloid substance, gas and organic substance which are not dissociated in the water are removed to a very low degree.
Wherein, the adjusting valve 15 is an electronic single seat adjusting valve LDZDL.
The evacuation valve 21 is a PZ44H blowoff valve.
The water outlet of the pure water can reach more than 10M omega generally, and the phenomenon of scale generation in the use process can be effectively solved by using the steam produced by the pure water equipment 14.
The pure water (the resistivity is more than or equal to 15M omega) produced by the pure water equipment 14 is led into the water storage tank 16 for storage, then the water is quantitatively supplied by the quantitative pump 17 according to the steam quantity, the pure water turns the water into the steam with certain pressure through the steam generator 18, the steam is heated to the required high temperature by the steam heater after entering the next procedure, and finally enters the fluidized bed, because the heated high-temperature steam has certain pressure and high-temperature characteristics, a safety valve 20 door and an exhaust valve 21 are arranged on the pipeline to ensure the safety of the system operation, when the steam pressure exceeds the limit value during the operation, the safety valve 20 is automatically opened to play a role of pressure reduction protection. The evacuation valve 21 protects against steam evacuation through the evacuation valve 21 door in the event of excessive pressure, temperature or flow in the pipeline or safety issues that would otherwise arise in the system. The steam quantity needs to be adjusted at any time in the test process, so the regulating valve 15 is arranged on the pipeline, and the steam quantity entering the fluidized bed is adjusted by discharging the steam in the pipeline, thereby achieving the purpose of the test.
According to one embodiment of the present application, the above structure is adopted in the 1KG steam reforming test, and the test completely meets the requirements, and the test data is as follows:
14 water quality of the water purification equipment: EDI is less than or equal to 15M omega
The steam amount control can be realized by the constant delivery pump 17 and the control valve 15 on the pipeline.
The reaction of the steam with the radioactive spent resin from the off-gas analysis produced no additional impurity components, and the data showed that the steam produced by the pure water was pure.
Through the operation of equipment in a certain period, the equipment such as the water storage tank 16, the steam generator, the pipeline, the fluidized bed and the like are disassembled for detection, and no scale is generated on the contact surface, which also shows that the method can solve the problem of scale generation in the pipeline in long-term operation.
According to one embodiment of the present application, the radioactive waste resin in the fluidized bed 1 is decomposed into inorganic substances and flue gas at high temperature with respect to the exhaust gas discharge of the fluidized bed, and the particle size of the decomposed inorganic substances is 20 μm or more.
The outlet of the fluidized bed 1 is communicated with a cyclone separator 2 through a pipeline, the cyclone separator 2 carries out gas-solid separation on the waste gas, and 90% of inorganic matters are intercepted and collected.
The cyclone separator 2 is communicated with the high-temperature filter 3, in order to guarantee that 10% of fine particles and ash fly to be intercepted, the waste gas is guided into the high-precision and high-temperature resistant filter 3, the fine particles and the ash fly are intercepted, the separation efficiency reaches 99.9%, and the filtering rate still cannot reach 100%.
The cyclone separator 2 and the high-temperature filter 3 are both communicated with the waste solid collector 5, wherein the cyclone separator 2 is communicated with the waste solid collector 5 through a first waste solid collecting pipe 10, and the high-temperature filter 3 is communicated with the waste solid collector 5 through a second waste solid collecting pipe 11.
The cyclone 2 and the high temperature filter 3 guide the separated and intercepted fixed into a waste solid collector 5 for resource recovery.
The high-temperature filter 3 is sequentially communicated with the total oxidation furnace 4, the spray tower 6 and the gas-liquid separator 7, a spray head for alkali washing is arranged in the spray tower 6, and the gas-liquid separator 7 is sequentially communicated with the vacuum pump 8 and the chimney 9.
Wherein, the gas-liquid separator 7 returns the liquid to the spray tower 6 through the second waste liquid collecting pipe 12, and the spray tower 6 recovers the liquid through the first waste liquid collecting pipe 13.
The waste gas enters the full-oxidation furnace 4 device, a small amount of inorganic matters and organic compounds are subjected to high-temperature combustion, the combusted tail gas enters the spray tower 6 along with the gas flow direction lower end for alkali washing, and the gas is purified again in a spraying mode.
High-temperature gas can produce steam and discharge through spraying the purification back, for preventing to contain trace particulate matter and a large amount of moisture in the steam, has set up vapour and liquid separator 7 in the preface, purifies gas once more, collects the water of interception and discharges to spray column 6 again, has finally realized the emission requirement of up to standard gas.
The parameters of the related components in the present embodiment are as follows:
a cyclone separator: operating pressure: -9kpa, operating temperature: 750 ℃, separation precision: 20-500 μm; separation efficiency: 80-90%.
A high-temperature filter: operating pressure: -9kpa, operating temperature: 750 ℃, separation precision: 10-50 μm; separation efficiency: 99.9 percent.
A total oxidation furnace: combustion temperature: 1100 ℃, furnace pressure: -200 to 50 pa.
A spray tower: cooling working medium: water, inlet temperature 800 deg.c and outlet temperature 50 deg.c.
A gas-liquid separator: operating pressure: 1.8kpa, operating temperature: 50 ℃, separation accuracy: 1-100 μm; separation efficiency: 99.9 percent.
The experimental data for the 1KG steam reforming of this example are as follows:
the radioactive waste resin is decomposed at high temperature to generate about 15% of inorganic matters and 3% of fly ash at the temperature of 700-750 ℃.
And (3) purifying data:
cyclone separator
Separation efficiency 90%, inorganic 0.18 kg.
High temperature filter
Separation efficiency 99.8%, inorganic matter 0.2 kg.
Gas-liquid separator
The water removal rate in the gas reaches 99.9 percent.
Finally, the tail gas is tested, and the standard emission requirement of the gas is met.
The utility model discloses at the entry end of fluidized bed, through the cooperation of pure water equipment 14, steam generator 18 and steam superheater 19, solved in the radioactive spent resin steam reforming technique that the impurity that the high temperature fluidization heat-transfer medium of fluidized bed brought influences the many maintenance scheduling problems that the reaction, tail gas production volume are big and the production of incrustation scale is unfavorable for the later stage in operation.
The utility model removes and intercepts most of inorganic substances, fine particles and ash fly in the waste gas by passing the waste gas in the fluidized bed 1 through the cyclone separator 2 and the high temperature filter 3 in turn; and the residual gas is sequentially led into a total oxidation furnace 4, a spray tower 6 and a gas-liquid separator 7, the residual small amount of inorganic matters and organic compounds are subjected to high-temperature combustion, the burnt tail gas is subjected to alkali washing, and the gas is purified again in a spraying mode, so that the purification of the gas of the radioactive organic waste steam reforming device is realized.
The utility model discloses a structure setting and cooperation at the entry end of fluidized bed 1 and exhaust end (exit end), reduced the production of in-service incrustation scale, reduced tail gas production volume to improve the purification of tail gas (waste gas), had stronger practicality.
While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (5)
1. A steam supply and exhaust gas purification system for a steam reformer, comprising: comprises a fluidized bed; the inlet end of the fluidized bed is sequentially communicated with the steam superheater and the steam generator, and an exhaust valve, a safety valve and a regulating valve are sequentially arranged on pipelines at the inlet ends of the steam superheater and the fluidized bed; the steam generator is sequentially communicated with the water storage tank and the pure water equipment through a constant delivery pump;
the outlet end of the fluidized bed is communicated with the cyclone separator through a pipeline; the cyclone separator is communicated with the high-temperature filter; the cyclone separator and the high-temperature filter are both communicated with the waste solid collector; the high-temperature filter is communicated with the total oxidation furnace, the spray tower and the gas-liquid separator in sequence; a spray head for performing alkaline washing is arranged in the spray tower; the gas-liquid separator is communicated with the vacuum pump and the chimney in sequence.
2. The steam supplying and exhaust gas purifying system of a steam reformer according to claim 1, wherein: and regulating valves are arranged on a pipeline between the pure water equipment and the water storage tank, a pipeline between the water storage tank and the constant delivery pump and a pipeline between the constant delivery pump and the steam generator.
3. The steam supplying and exhaust gas purifying system of a steam reformer according to claim 1, wherein: the cyclone separator is communicated with the waste solid collector through a first waste solid collecting pipe.
4. The steam supplying and exhaust gas purifying system of a steam reformer according to claim 1, wherein: and the high-temperature filter is communicated with the waste solid collector through a second waste solid collecting pipe.
5. The steam supplying and exhaust gas purifying system of a steam reformer according to claim 1, wherein: the gas-liquid separator returns liquid to the spray tower through a second waste liquid collecting pipe; the spray tower recovers liquid through the first waste liquid collecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922057421.9U CN211232906U (en) | 2019-11-25 | 2019-11-25 | Steam supply and exhaust gas purification system of steam reforming device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922057421.9U CN211232906U (en) | 2019-11-25 | 2019-11-25 | Steam supply and exhaust gas purification system of steam reforming device |
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| CN211232906U true CN211232906U (en) | 2020-08-11 |
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| CN201922057421.9U Active CN211232906U (en) | 2019-11-25 | 2019-11-25 | Steam supply and exhaust gas purification system of steam reforming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779028A (en) * | 2019-11-25 | 2020-02-11 | 成都天保节能环保工程有限公司 | Steam supply and exhaust gas purification system of steam reforming device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779028A (en) * | 2019-11-25 | 2020-02-11 | 成都天保节能环保工程有限公司 | Steam supply and exhaust gas purification system of steam reforming device |
| CN110779028B (en) * | 2019-11-25 | 2024-07-30 | 成都天保节能环保工程有限公司 | Steam supply and waste gas purification system of steam reforming device |
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