CN116557892A - Improving CO in flue gas 2 Flue gas circulation oxygen-enriched combustion system with emission concentration - Google Patents
Improving CO in flue gas 2 Flue gas circulation oxygen-enriched combustion system with emission concentration Download PDFInfo
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- CN116557892A CN116557892A CN202310117299.8A CN202310117299A CN116557892A CN 116557892 A CN116557892 A CN 116557892A CN 202310117299 A CN202310117299 A CN 202310117299A CN 116557892 A CN116557892 A CN 116557892A
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- flue gas
- gas
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- combustion
- pipeline
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 239000003546 flue gas Substances 0.000 title claims abstract description 151
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000001301 oxygen Substances 0.000 title claims abstract description 51
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 86
- 239000000779 smoke Substances 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000000428 dust Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 239000002737 fuel gas Substances 0.000 abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 33
- 229910002092 carbon dioxide Inorganic materials 0.000 description 16
- 238000001914 filtration Methods 0.000 description 12
- 238000007599 discharging Methods 0.000 description 10
- 239000001569 carbon dioxide Substances 0.000 description 9
- 235000011089 carbon dioxide Nutrition 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000194 supercritical-fluid extraction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention relates to a flue gas circulation oxygen-enriched combustion system for improving CO2 emission concentration in flue gas, which comprises a heating furnace, a burner, an oxygen main pipe, a fuel gas main pipe and an intelligent combustion control system, and further comprises the following components: the device comprises a flue gas heat collector, a gas preheater, a high-sealing variable-frequency fan, a flue gas cooler, a flue gas dehydrator and a combustion-supporting gas mixer; the oxygen main pipe sequentially passes through the combustion-supporting gas mixer and the gas preheater and is connected with the oxygen inlets of the heating furnace and the burner, and the gas main pipe passes through the gas preheater and is connected with the gas inlets of the heating furnace and the burner; the flue gas pipeline I is connected with the flue gas outlet of the heating furnace and the burner, and sequentially passes through the flue gas heat collector and the gas preheater and is connected with the inlet of the high-sealing variable-frequency fan, the outlet of the high-sealing variable-frequency fan is connected with the inlet of the flue gas dehydrator, the outlet of the flue gas dehydrator is communicated with the combustion-supporting gas mixer through the flue gas pipeline II, and the middle part of the flue gas pipeline II is connected with the smoke exhaust pipe.
Description
Technical Field
The invention relates to a smoke circulating oxygen-enriched combustion system for improving CO2 emission concentration in smoke, which is a novel combustion system for petrochemical industry, metallurgy, building materials and other industries, in particular to a smoke circulating oxygen-enriched combustion system for improving CO2 emission concentration in smoke.
Background
In recent years, the problem of exacerbation of greenhouse effect and economic sustainable development face serious challenges, and therefore, the emission reduction technology for carbon dioxide causing greenhouse effect has become a focus of attention. How to reduce the emission of carbon dioxide and reasonably collect and apply the carbon dioxide becomes a difficult problem.
CO at present 2 The application fields of the water-based fire extinguishing agent are widely expanded, and besides the well-known carbonated beverage and fire extinguishing agent, the CO is used in the departments of industry, agriculture, national defense, medical treatment and the like 2 . Scientific research has proven that CO 2 Has higher civil and industrial value, namely, CO 2 Can be used as a raw material for synthesizing basic chemical raw materials; in the form of CO 2 Performing supercritical extraction on the solvent; the method can also be applied to the high-tech fields of food engineering, laser technology, nuclear industry and the like; the new application developed in recent years such as greenhouse vegetable gas fertilizer, fresh-keeping and production of degradable plastics and the like also shows good development prospect.
In petrochemical industry, carbon dioxide is mainly discharged by combustion, and if carbon dioxide generated by combustion can be enriched and collected by a method, the carbon dioxide discharge can be greatly reduced, so that the greenhouse effect is reduced.
In summary, the above problems can be solved by developing a flue gas circulating oxygen-enriched combustion system for increasing the concentration of CO2 discharged in flue gas.
Disclosure of Invention
The invention aims to provide a flue gas circulation oxygen-enriched combustion system for improving the CO2 emission concentration in flue gas, so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an improve flue gas circulation oxygen-enriched combustion system of CO2 emission concentration in flue gas, includes heating furnace and combustor, oxygen are responsible for, gas is responsible for and intelligent combustion control system, still includes:
the device comprises a flue gas heat collector, a gas preheater, a high-sealing variable-frequency fan, a flue gas cooler, a flue gas dehydrator and a combustion-supporting gas mixer;
the oxygen main pipe sequentially passes through the combustion-supporting gas mixer, the gas preheater and the oxygen inlet of the heating furnace and the burner, the gas main pipe passes through the gas preheater and is connected with the gas inlet of the heating furnace and the burner, and the oxygen main pipe is communicated with the combustion-supporting gas mixer;
the flue gas outlet of the heating furnace and the flue gas outlet of the burner are connected with a flue gas pipeline I, the flue gas pipeline I sequentially penetrates through the flue gas heat collector and the gas preheater and is connected with the inlet of the high-sealing variable-frequency fan, the flue gas pipeline I is communicated with the flue gas heat collector, the outlet of the high-sealing variable-frequency fan is connected with the inlet of the flue gas dehydrator, the outlet of the flue gas dehydrator is communicated with the combustion-supporting gas mixer through a flue gas pipeline II, and the middle part of the flue gas pipeline II is connected with the smoke exhaust pipe.
Preferably, the oxygen main pipe and the gas main pipe are connected with flame arresters at one ends close to the heating furnace and the burner, and a section of the oxygen main pipe between the combustion-supporting gas mixer and the gas preheater is connected with a pressure gauge.
Preferably, the outlet end of the high-sealing variable-frequency fan is connected with an emergency cut-off valve, the second smoke pipeline is sequentially connected with an electric flow control valve and a gas flowmeter along the smoke flow direction, the smoke exhaust pipe is positioned between the electric flow control valve and the smoke dehydrator, and the smoke exhaust pipe is sequentially connected with the electric flow control valve and the emergency cut-off valve along the smoke flow direction.
Preferably, the intelligent combustion control system includes:
the self-adaptive adjustment control terminal and the system server;
the oxygen main pipe and the fuel gas main pipe are sequentially connected with a filter, an emergency cut-off valve, a pressure regulating valve, a micro regulating valve, an overflow valve, a gas flowmeter and a pressure transmitter along the air flow direction;
o arranged on the oxygen main pipe and positioned between the combustion-supporting gas mixer and the gas preheater 2 An on-line analyzer for content;
COe and O arranged on the first flue gas pipeline and positioned between the flue gas heat collector and the heating furnace and between the flue gas heat collector and the burner 2 Detecting a detecting point of the analyzer and the smoke sampling;
CO arranged on the smoke exhaust pipe and near the inlet end 2 An online analyzer;
a hearth temperature sensor and a hearth pressure sensor arranged on the furnace wall of the heating furnace and the burner.
Preferably, the flue gas heat collector comprises a heat exchange box, the first flue gas pipeline is communicated with the upper end and the lower end of the heat exchange box, a plurality of heat exchange pipelines which are arranged in parallel are fixed on the inner wall of the heat exchange box, one end of each heat exchange pipeline is connected with a low-temperature cold water pipe, and the other end of each heat exchange pipeline is connected with a high-temperature hot water pipe.
Preferably, the inside of the heat exchange pipeline is inserted and fixed in a shaft to rotate and connected with a hairbrush, one end of the hairbrush penetrates through the side wall of the heat exchange box, and one end of each hairbrush positioned on the outer side of the heat exchange box is connected with a motor in a transmission manner through a belt wheel assembly I.
Preferably, the fixed shaft on the inner wall of the heat exchange box is rotationally connected with a plurality of reciprocating screw rods which are in one-to-one correspondence with the heat exchange pipelines, one end of each reciprocating screw rod penetrates through the side wall of the heat exchange box, one end of each reciprocating screw rod positioned on the outer side of the heat exchange box is in transmission connection with a corresponding brush through a belt wheel assembly II, a sliding sleeve which is matched with the reciprocating screw rod is sleeved on the reciprocating screw rod in a sliding manner, a brush ring is sleeved on the heat exchange pipeline, and the sliding sleeve is fixedly connected with the corresponding brush ring.
Preferably, a dust filtering net is fixed at the bottom of the heat exchange box when the bottom of the heat exchange box is inclined, an ash discharging pipe is fixed on and communicated with the side wall of the heat exchange box, the ash discharging pipe is positioned at the lower end of the dust filtering net, and the ash discharging pipe is connected with a first control valve and a second control valve.
Preferably, the outer side wall of the heat exchange box is fixedly provided with a scale removal box, the inner fixed shaft of the scale removal box is rotationally connected with a shaft rod, the middle part of the shaft rod is fixedly provided with an impeller, the upper end of the shaft rod is fixedly provided with a scale filtration net, a high-temperature hot water pipe is communicated with the lower end of the side wall of the scale removal box, the lower end of the scale removal box is fixedly connected with a scale removal pipe, the scale removal pipe is connected with a control valve III, and the upper end of the side edge of the scale removal box is fixedly connected with a hot water outlet pipe.
Preferably, the end part of one of the brushes is coaxially and fixedly connected with a rotary table, a pin rod is fixed at a position, far away from the center of a circle, on the rotary table, a hammer rod penetrates through and is in sliding connection with the top wall of the descaling box, the upper end and the lower end of the hammer rod are respectively and fixedly connected with a sliding frame and a hammer head, and the pin rod is inserted and is in sliding connection with the sliding frame.
Compared with the prior art, the invention has the beneficial effects that:
1) CO in the discharged flue gas 2 The concentration of the components reaches more than 95 percent, and CO 2 Can be used as one of products for recycling, realizes zero emission in the true sense, and does not produce pollutants such as NOx, SOx and the like in the combustion process.
2) The heat in the reflux flue gas is fully utilized, combustion-supporting gas and fuel gas or other purposes can be preheated, and the combustion efficiency is improved.
3) The combustion system adopts a pure oxygen combustion technology and a flue gas backflow technology, so that the problem that nitrogen oxides are generated by taking air as combustion-supporting gas in the prior art is solved, and the problems that the temperature field in the pure oxygen combustion furnace is unevenly distributed and the local temperature is too high are also solved.
4) The intelligent combustion control system is used for controlling, the combustion conditions of the heating furnace and the burner can be monitored in real time, the smoke components are detected, the back flow smoke quantity is controlled, and the dynamic adjustment and reporting of the environmental protection department can be performed in time according to a preset value.
Drawings
FIG. 1 is a schematic diagram of the general assembly structure of the present invention;
FIG. 2 is a schematic view of the oxygen main pipe and the fuel gas main pipe of FIG. 1;
FIG. 3 is a schematic diagram of a flue gas heat collector in the invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3 at A;
FIG. 5 is a schematic cross-sectional view of a descaling box according to the present invention;
fig. 6 is a schematic view of the turntable and carriage structure of the present invention.
In the figure: 1. a heating furnace and a burner; 2. a flue gas heat collector; 3. a gas preheater; 4. a high-sealing variable-frequency fan; 5. a flue gas cooler; 6. a flue gas dehydrator; 7. a combustion-supporting gas mixer; 8. COe, O 2 A detection analyzer; 9. o (O) 2 An on-line analyzer for content; 10. CO 2 An online analyzer; 11. a filter; 12. an emergency shut-off valve; 13. a pressure regulating valve; 14. a micro regulating valve; 15. an overflow valve; 16. a gas flow meter; 17. a pressure transmitter; 18. a pressure gauge; 19. an electric flow control valve; 20. a flame arrester; 21. a self-adaptive adjustment control terminal; 22. a system server; 23. a flue gas sampling detection point; 24. a furnace temperature sensor; 25. a furnace chamber pressure sensor; 26. a first flue gas pipeline; 27. a flue gas pipeline II; 28. a smoke exhaust pipe; 29. a heat exchange box; 30. a reciprocating screw rod; 31. a low temperature cold water pipe; 32. a high-temperature hot water pipe; 33. an ash discharge pipe; 34. a first control valve; 35. a second control valve; 36. a belt wheel assembly I; 37. a belt wheel assembly II; 38. a descaling box; 39. a hot water outlet pipe; 40. a heat exchange pipeline; 41. a brush; 42. a sliding sleeve; 43. a brush ring; 44. a shaft lever; 45. an impeller; 46. a scale removing pipe; 47. a third control valve; 48. a turntable; 49. a pin rod; 50. a carriage; 51. a hammer rod; 52. a hammer head; 53. a dust filtering net; 54. a dirt filtering net.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1 to 6, the present invention provides a technical solution: the utility model provides an improve flue gas circulation oxygen-enriched combustion system of CO2 emission concentration in flue gas, includes heating furnace and combustor 1, oxygen are responsible for, gas is responsible for and intelligent combustion control system, still includes:
the flue gas heat collector 2, the gas preheater 3, the high-sealing variable-frequency fan 4, the flue gas cooler 5, the flue gas dehydrator 6 and the combustion-supporting gas mixer 7;
the oxygen main pipe sequentially passes through the combustion-supporting gas mixer 7 and the gas preheater 3 and is connected with the oxygen inlets of the heating furnace and the burner 1, the gas main pipe passes through the gas preheater 3 and is connected with the gas inlets of the heating furnace and the burner 1, and the oxygen main pipe is communicated with the combustion-supporting gas mixer 7;
the flue gas outlet of the heating furnace and the burner 1 is connected with a flue gas pipeline I26, the flue gas pipeline I26 sequentially passes through the flue gas heat collector 2 and the gas preheater 3 and is connected with the inlet of the high-sealing variable-frequency fan 4, the flue gas pipeline I26 is communicated with the flue gas heat collector 2, the outlet of the high-sealing variable-frequency fan 4 is connected with the inlet of the flue gas dehydrator 6, the outlet of the flue gas dehydrator 6 is communicated with the combustion-supporting gas mixer 7 through a flue gas pipeline II 27, and the middle part of the flue gas pipeline II 27 is connected with a flue gas exhaust pipe 28;
the intelligent combustion control system includes:
an adaptive adjustment control terminal 21 and a system server 22;
the oxygen main pipe and the gas main pipe are respectively connected with a filter 11, an emergency cut-off valve 12, a pressure regulating valve 13, a micro regulating valve 14, an overflow valve 15, a gas flowmeter 16 and a pressure transmitter 17 in turn along the air flow direction, wherein the air inlet end is close to the air inlet end;
o arranged on the oxygen main pipe and located between the combustion gas mixer 7 and the gas preheater 3 2 A content online analyzer 9;
COe, O arranged on the first flue gas pipeline 26 and positioned between the flue gas heat collector 2 and the heating furnace and the burner 1 2 A detection analyzer 8 and a smoke sampling detection point 23;
CO disposed on the smoke exhaust pipe 28 near the inlet end 2 An online analyzer 10;
a furnace temperature sensor 24 and a furnace pressure sensor 25 provided on the furnace wall of the heating furnace and burner 1.
In this embodiment, the one end that is close to heating furnace and combustor 1 on oxygen is responsible for and is responsible for with the gas all is connected with flame arrester 20, and the one section that is located between combustion-supporting gas blender 7 and gas preheater 3 on the oxygen is responsible for is connected with manometer 18, and the exit end of high sealed variable frequency fan 4 is connected with urgent trip valve 12, has connected gradually electric flow control valve 19 and gas flowmeter 16 along the flue gas flow direction on the flue gas pipeline two 27, and the exhaust pipe 28 is located between electric flow control valve 19 and the flue gas dehydrator 6, has connected gradually electric flow control valve 19 and urgent trip valve 12 along the flue gas flow direction on the exhaust pipe 28.
In the above embodiment, the heating furnace and the burner 1 are the actuating mechanism of the system, the fuel gas and the combustion-supporting gas are combusted therein, the generated heat is the material heating, the flue gas is heated, 2 is the heat exchanger, the flue gas heat can be used as the purpose of water heating and the like, the high-temperature flue gas temperature is primarily reduced to about 300 ℃, the gas is preheated, 3 adopts the spiral tube type double-preheating heat exchanger, the fuel gas and the combustion-supporting gas are preheated by utilizing the flue gas heat, the flue gas is cooled, 5 utilizes the condensing agent to absorb the flue gas waste heat, the flue gas temperature is reduced to below 100 ℃, the vapor in the flue gas is converted into liquid water, the vaporization latent heat in the flue gas is recovered to the maximum extent, meanwhile, the condensation water generated after the flue gas cooling is obtained and is effectively discharged, the flue gas is dehydrated, 6 is used for settling the sewage through the action of gravity or centripetal force, the sewage is separated from the flue gas, the gas mixer 7 is used for fully mixing the flue gas and oxygen, the heating furnace and the burner 1 is provided with the gas, the high-sealing fan 4 guides the flue gas from the heating furnace to the flue gas pipeline, the kinetic energy is provided for providing the flue gas, and the high-sealing fan 4 adopts the fan with high sealing and combustion-supporting performance, the combustion-supporting and the combustion-supporting gas flow rate and the fan, the flue gas leakage is prevented, and the flue gas flow rate and the combustion-supporting gas flow rate can be controlled, and the flue gas flow rate and the combustion-supporting device can be controlled to be arranged on the flue gas pipe and the fire-supporting device.
In this embodiment, the flue gas heat collector 2 includes a heat exchange box 29, and flue gas pipeline one 26 is linked together with the upper and lower both ends of heat exchange box 29, be fixed with a plurality of heat exchange pipes 40 that are parallel to each other on the inner wall of heat exchange box 29, low temperature cold water pipe 31 is connected to heat exchange pipe 40's one end, and hot water pipe 32 is connected to the other end, and heat exchange pipe 40's inside grafting is connected with brush 41 with the dead axle rotation, and the one end of brush 41 runs through the lateral wall of heat exchange box 29, each brush 41 is located the one end in the heat exchange box 29 outside and is connected with motor drive through band pulley subassembly one 36, the motor is not drawn in this application, motor and whole system synchronous start.
In this embodiment, a plurality of reciprocating screw rods 30 corresponding to the heat exchange pipes 40 one by one are fixedly connected to the inner wall of the heat exchange box 29 in a rotating manner, one end of each reciprocating screw rod 30 penetrates through the side wall of the heat exchange box 29, one end of each reciprocating screw rod 30 located on the outer side of the heat exchange box 29 is in transmission connection with a corresponding brush 41 through a belt wheel assembly II 37, a sliding sleeve 42 which is matched with the reciprocating screw rods 30 is sleeved on each reciprocating screw rod 30 in a sliding manner, a brush ring 43 is sleeved on each heat exchange pipe 40, the sliding sleeve 42 is fixedly connected with the corresponding brush ring 43, a dust filtering net 53 is fixed when the bottom of the heat exchange box 29 is inclined, an ash discharging pipe 33 is fixed on the side wall of the heat exchange box 29 and communicated with the side wall of the heat exchange box, the ash discharging pipe 33 is located at the lower end of the dust filtering net 53, and a control valve I34 and a control valve II 35 are connected to the ash discharging pipe 33.
In this embodiment, a descaling box 38 is fixed on the outer side wall of the heat exchange box 29, a shaft lever 44 is fixedly connected with the inside fixed shaft of the descaling box 38, an impeller 45 is fixed in the middle of the shaft lever 44, a scale filtering net 54 is fixed at the upper end of the shaft lever, a high-temperature hot water pipe 32 is communicated with the lower end of the side wall of the descaling box 38, the lower end of the descaling box 38 is fixedly connected with a scale discharging pipe 46, a control valve three 47 is connected on the scale discharging pipe 46, the upper end of the side edge of the descaling box 38 is fixedly connected with a hot water outlet pipe 39, one end of the hairbrush 41 is coaxially and fixedly connected with a rotary disc 48, a pin 49 is fixed on the rotary disc 48 at a position far from the center of a circle, a hammer rod 51 penetrates through and is connected with the top wall of the descaling box 38 in a sliding manner, the upper end and the lower end of the hammer rod 51 are fixedly connected with a sliding frame 50 and a hammer head 52 respectively, and the pin 49 is spliced and connected in the sliding frame 50.
The invention has the working principle and advantages that: when the flue gas circulation oxygen-enriched combustion system for improving the CO2 emission concentration in the flue gas is used, the working process is as follows:
when the burner is just started to work, no smoke is generated, so that the burner is burnt by pure oxygen for a short period of time, the fuel gas and the oxygen are burnt in proportion according to chemical equivalent, and after a period of work, the smoke is generated stably.
The flue gas generated by the heating furnace and the burner 1 is led into a flue gas pipeline I by a high-sealing variable-frequency fan 4, the flue gas exchanges heat with the flue gas heat collector 2 through the gas preheater 3, then is dehydrated through the flue gas cooler 5 and the flue gas dehydrator 6 and then is divided into two paths, one path directly discharges smoke through a smoke discharge pipe 28, the other path flows into a combustion-supporting gas mixer 7 to be mixed with oxygen, the oxygen concentration of a combustion improver after the flue gas is mixed with the oxygen is adjustable within any proportion within a range of 30% -35%, the combustion-supporting gas and the fuel gas enter the burner to be combusted after being preheated by the gas preheater 3, and the generated flue gas is combusted again through cyclic heat exchange until CO 2 The concentration reaches more than 95%, and the flue gas is cooled and sent to a process area for processing and is used as a raw material for manufacturing other products such as dry ice.
In the use process of the invention, the control of combustion, the control of the amount of backflow smoke and the discharge of carbon dioxide are controlled by an intelligent combustion control system:
1) For combustion control of the heating furnace and the burner 1, a hearth temperature sensor 24 and a hearth pressure sensor 25 detect furnace temperature and furnace pressure, COe, O 2 The detection analyzer 8 is used for detecting oxygen and unburnt combustibles such as CO, CH4, H2 and the like in the flue gas, the sensor and the analyzer transmit signals to the self-adaptive adjustment control terminal 21, the self-adaptive adjustment control terminal 21 analyzes data, the data are uploaded to the system server 22, adjustment judgment is made according to expected control parameters of the system server 22, and signals are output to the primary actuator such as the micro-adjustment valve 14, the pressure regulating valve 13 and the like, so that the pressure and flow of combustion-supporting gas and the fuel gas are dynamically adjusted, and the whole combustion system is enabled to work in a safe and energy-saving state stably.
2) For controlling the amount of the backflow flue gas, the amount of the backflow flue gas directly influences the oxygen content of the combustion-supporting gas, the oxygen content of the combustion-supporting gas is kept at 30% -35%, oxygen-enriched combustion is realized, and then the flue gas flow is monitored by the flue gas flowmeter 16, and O 2 The content on-line analyzer 9 detects the oxygen content in the combustion-supporting gas, and the two sensors input signals to the self-adaptive adjustment control terminal 21 for system serviceThe device 22 makes judgment and outputs signals to the high-sealing variable-frequency fan 4 and the electric flow control valve 19, and the air suction quantity and the flue gas flow are regulated so that the oxygen content of the combustion-supporting gas is in an oxygen-enriched state.
3) For control of carbon dioxide emissions, the CO 2 The on-line analyzer 10 detects the carbon dioxide concentration on the smoke pipeline exhaust branch, and inputs the signal to the self-adaptive adjustment control terminal 21, the system server 22 makes a judgment, and outputs the signal to the electric flow control valve 19, if the detection result shows CO 2 The concentration is more than 95%, and the electric flow control valve 19 is fully opened to partially control CO 2 Is discharged and collected and sent to a process area for processing.
4) In the operation process of the combustion system, various parameters are collected, stored and analyzed in the system server 22, the analyzed data are displayed on the intelligent display terminal, after the various data are analyzed, a factory manager can issue an adjustment instruction to the self-adaptive adjustment control terminal through the system control terminal, the self-adaptive adjustment control terminal 21 further adjusts various valves after analyzing, the emission reporting terminal can be connected with a local environmental protection department, specific system working conditions and emission conditions are uploaded in real time, and various data can be checked through the identity of the manager in a webpage.
As shown in fig. 1, fig. 3, fig. 4, fig. 5 and fig. 6, when the flue gas enters the heat exchange box 29 for heat exchange, the working process is as follows, the low-temperature cold water pipe 31 conveys cold water to each heat exchange pipeline 40, and heat in the high-temperature flue gas is converted into water liquid in the heat exchange pipeline 40 through the heat conduction effect of the heat exchange pipeline 40, so that hot water flows out of the hot water pipe 32, recovery of the heat of the flue gas is realized, the temperature of the flue gas is reduced to about 300 ℃, the first belt pulley assembly 36 drives each brush 41 to rotate after the motor is started, the brushes 41 clean scale on the inner wall of the heat exchange pipeline 40 in real time, the heat exchange efficiency is avoided from being reduced due to scale accumulation, the water flow is reduced, the second belt pulley assembly 37 drives the reciprocating screw 30 to rotate at the same time, the reciprocating screw 30 drives the brush ring 43 to clean smoke dust and oxidized attachments on the outer side wall of the heat exchange pipeline 40 through the sliding sleeve 42, the service life of the heat exchange pipeline is prolonged, the heat exchange efficiency is kept high-efficiency, and the cleaning difficulty and strength of the heat exchange pipeline 40 are reduced.
The smoke dust in the heat exchange box 29 is filtered and blocked by the dust filtering net 53 to be output after being purified so as to protect the subsequent equipment pipelines, the smoke dust blocked by the dust filtering net 53 is gathered in the dust discharging pipe 33, the smoke dust is discharged by alternately opening the first control valve 34 and the second control valve 35, the operation is simple and convenient, and the operation of the whole system is not influenced.
The hot water discharged from the hot water pipe 32 enters the descaling box 38, scale in the water is filtered and purified through the scale filtering net 54, so that the scale is collected, the purified hot water is discharged from the hot water outlet pipe 39, the scale is accumulated in the scale discharging pipe 46, and the scale can be cleaned by opening the control valve III 47.
The water flow drives the shaft lever 44 to rotate through the impeller 45 while flowing in the descaling box 38, so that the shaft lever 44 drives the scale filter screen 54 to rotate, and meanwhile, the rotation of the hairbrush 41 drives the rotary table 48 to rotate, so that the rotary table 48 drives the sliding frame 50 and the hammer rod 51 to move up and down through the pin rod 49, and the hammer rod 51 drives the hammer head 52 to continuously hammer the scale filter screen 54, so that scale adhered to the bottom surface of the scale filter screen 54 is removed, and the efficient filtering effect of the scale filter screen 54 is maintained.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Claims (10)
1. The utility model provides an improve flue gas circulation oxygen-enriched combustion system of CO2 emission concentration in flue gas, includes heating furnace and combustor (1), oxygen is responsible for, gas is responsible for and intelligent combustion control system, its characterized in that: further comprises:
the device comprises a flue gas heat collector (2), a gas preheater (3), a high-sealing variable-frequency fan (4), a flue gas cooler (5), a flue gas dehydrator (6) and a combustion-supporting gas mixer (7);
the oxygen main pipe sequentially passes through the combustion-supporting gas mixer (7) and the gas preheater (3) and is connected with the oxygen inlets of the heating furnace and the burner (1), the gas main pipe passes through the gas preheater (3) and is connected with the gas inlets of the heating furnace and the burner (1), and the oxygen main pipe is communicated with the combustion-supporting gas mixer (7);
the flue gas pipeline I (26) is connected to the flue gas outlet of the heating furnace and the combustor (1), the flue gas pipeline I (26) sequentially penetrates through the flue gas heat collector (2) and the gas preheater (3) and is connected with the inlet of the high-sealing variable-frequency fan (4), the flue gas pipeline I (26) is communicated with the flue gas heat collector (2), the outlet of the high-sealing variable-frequency fan (4) is connected with the inlet of the flue gas dehydrator (6), the outlet of the flue gas dehydrator (6) is communicated with the combustion-supporting gas mixer (7) through the flue gas pipeline II (27), and the middle part of the flue gas pipeline II (27) is connected with the smoke exhaust pipe (28).
2. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 1, wherein: and one ends of the oxygen main pipe and the gas main pipe, which are close to the heating furnace and the burner (1), are connected with flame arresters (20), and a section of the oxygen main pipe, which is positioned between the combustion-supporting gas mixer (7) and the gas preheater (3), is connected with a pressure gauge (18).
3. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 2, characterized in that: the outlet end of the high-sealing variable-frequency fan (4) is connected with an emergency cut-off valve (12), an electric flow control valve (19) and a gas flowmeter (16) are sequentially connected to a smoke pipeline II (27) along the smoke flow direction, a smoke exhaust pipe (28) is positioned between the electric flow control valve (19) and the smoke dehydrator (6), and the smoke exhaust pipe (28) is sequentially connected with the electric flow control valve (19) and the emergency cut-off valve (12) along the smoke flow direction.
4. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 3, wherein: the intelligent combustion control system includes:
an adaptive adjustment control terminal (21) and a system server (22);
the oxygen main pipe and the gas main pipe are sequentially connected with a filter (11), an emergency cut-off valve (12), a pressure regulating valve (13), a micro regulating valve (14), an overflow valve (15), a gas flowmeter (16) and a pressure transmitter (17) along the airflow direction;
an O2 content online analyzer (9) arranged on the oxygen main pipe and positioned between the combustion-supporting gas mixer (7) and the gas preheater (3);
a COe and O2 detection analyzer (8) and a smoke sampling detection point (23) which are arranged on the smoke pipeline I (26) and positioned between the smoke heat collector (2) and the heating furnace and the burner (1);
CO arranged on the smoke exhaust pipe (28) and near the inlet end 2 An online analyzer (10);
a hearth temperature sensor (24) and a hearth pressure sensor (25) which are arranged on the furnace wall of the heating furnace and the burner (1).
5. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 1, wherein: the flue gas heat collector (2) comprises a heat exchange box (29), a first flue gas pipeline (26) is communicated with the upper end and the lower end of the heat exchange box (29), a plurality of heat exchange pipelines (40) which are arranged in parallel are fixed on the inner wall of the heat exchange box (29), one end of each heat exchange pipeline (40) is connected with a low-temperature cold water pipe (31), and the other end of each heat exchange pipeline is connected with a high-temperature hot water pipe (32).
6. The flue gas recirculation oxygenized combustion system for increasing the concentration of CO2 emissions in flue gas of claim 5, wherein: the inside of the heat exchange pipeline (40) is inserted and fixedly connected with a hairbrush (41) in a rotating mode, one end of the hairbrush (41) penetrates through the side wall of the heat exchange box (29), and one end of each hairbrush (41) located on the outer side of the heat exchange box (29) is connected with a motor in a transmission mode through a belt wheel assembly I (36).
7. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 1, wherein: the utility model discloses a heat exchange device, including heat exchange box (29), reciprocating type lead screw (30) that is connected with a plurality of and heat exchange pipeline (40) one-to-one is rotated to the dead axle on heat exchange box (29) inner wall, and the lateral wall that heat exchange box (29) was run through to the one end of reciprocating type lead screw (30), one end that reciprocating type lead screw (30) are located heat exchange box (29) outside is passed through band pulley subassembly two (37) and is connected with corresponding brush (41) transmission, cover establishes and sliding connection have sliding sleeve (42) of looks adaptation on reciprocating type lead screw (30), the cover is equipped with brush ring (43) on heat exchange pipeline (40), and sliding sleeve (42) and brush ring (43) fixed connection that corresponds.
8. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 7, wherein: the dust filter net (53) is fixed at the bottom of the heat exchange box (29) when the bottom of the heat exchange box is inclined, the ash discharge pipe (33) is fixed on and communicated with the side wall of the heat exchange box (29), the ash discharge pipe (33) is positioned at the lower end of the dust filter net (53), and the ash discharge pipe (33) is connected with the first control valve (34) and the second control valve (35).
9. The flue gas recirculation oxygenized combustion system for increasing the concentration of CO2 emissions in flue gas of claim 6, wherein: be fixed with scale removal case (38) on the lateral wall of heat transfer case (29), the inside dead axle rotation of scale removal case (38) is connected with axostylus axostyle (44), the middle part of axostylus axostyle (44) is fixed with impeller (45), and the upper end is fixed with and strains dirty net (54), high temperature hot water pipe (32) are linked together with the lateral wall lower extreme of scale removal case (38), the lower extreme of scale removal case (38) is fixed and is connected scale removal pipe (46), and connects control valve three (47) on scale removal pipe (46), the side upper end of scale removal case (38) is fixed and is connected hot water exit tube (39).
10. A flue gas recirculation oxygenizing combustion system for increasing CO2 emission concentration in flue gas according to claim 9, wherein: the end part of one hairbrush (41) is coaxially and fixedly connected with a rotary table (48), a pin rod (49) is fixed at a position, far away from the center of a circle, on the rotary table (48), a hammer rod (51) penetrates through and is connected with the top wall of the descaling box (38) in a sliding mode, the upper end and the lower end of the hammer rod (51) are respectively and fixedly connected with a sliding frame (50) and a hammer head (52), and the pin rod (49) is inserted and connected in the sliding frame (50) in a sliding mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117299.8A CN116557892A (en) | 2023-02-15 | 2023-02-15 | Improving CO in flue gas 2 Flue gas circulation oxygen-enriched combustion system with emission concentration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310117299.8A CN116557892A (en) | 2023-02-15 | 2023-02-15 | Improving CO in flue gas 2 Flue gas circulation oxygen-enriched combustion system with emission concentration |
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| US20140065560A1 (en) * | 2012-09-03 | 2014-03-06 | Alstom Technology Ltd. | Method of operating an oxy-fuel boiler system |
| CN209230018U (en) * | 2018-12-21 | 2019-08-09 | 佛山宝力思节能设备科技有限公司 | A kind of high-efficiency environment friendly air energy water heater |
| CN212005686U (en) * | 2020-04-16 | 2020-11-24 | 无锡市大德汽车部件科技有限公司 | Pre-heat exchange part of boiler burner |
| CN112452047A (en) * | 2020-12-15 | 2021-03-09 | 肇庆智达自动化设备有限公司 | Turpentine oil recovery device |
| CN114777509A (en) * | 2022-05-07 | 2022-07-22 | 山东京博石油化工有限公司 | Heating furnace flue gas circulating combustion system and method |
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- 2023-02-15 CN CN202310117299.8A patent/CN116557892A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140065560A1 (en) * | 2012-09-03 | 2014-03-06 | Alstom Technology Ltd. | Method of operating an oxy-fuel boiler system |
| CN209230018U (en) * | 2018-12-21 | 2019-08-09 | 佛山宝力思节能设备科技有限公司 | A kind of high-efficiency environment friendly air energy water heater |
| CN212005686U (en) * | 2020-04-16 | 2020-11-24 | 无锡市大德汽车部件科技有限公司 | Pre-heat exchange part of boiler burner |
| CN112452047A (en) * | 2020-12-15 | 2021-03-09 | 肇庆智达自动化设备有限公司 | Turpentine oil recovery device |
| CN114777509A (en) * | 2022-05-07 | 2022-07-22 | 山东京博石油化工有限公司 | Heating furnace flue gas circulating combustion system and method |
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