CN115200019A - Three wastes coupling integration processing system - Google Patents
Three wastes coupling integration processing system Download PDFInfo
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- CN115200019A CN115200019A CN202210944747.7A CN202210944747A CN115200019A CN 115200019 A CN115200019 A CN 115200019A CN 202210944747 A CN202210944747 A CN 202210944747A CN 115200019 A CN115200019 A CN 115200019A
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- 239000002699 waste material Substances 0.000 title claims abstract description 123
- 230000008878 coupling Effects 0.000 title claims abstract description 24
- 238000010168 coupling process Methods 0.000 title claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 24
- 230000010354 integration Effects 0.000 title description 4
- 238000001816 cooling Methods 0.000 claims abstract description 65
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003546 flue gas Substances 0.000 claims abstract description 42
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 30
- 230000023556 desulfurization Effects 0.000 claims abstract description 30
- 238000005245 sintering Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002912 waste gas Substances 0.000 claims abstract description 18
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims description 35
- 239000000779 smoke Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 18
- 230000008016 vaporization Effects 0.000 claims description 17
- 238000009834 vaporization Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 239000003245 coal Substances 0.000 abstract description 7
- 239000002918 waste heat Substances 0.000 abstract description 6
- 239000010802 sludge Substances 0.000 abstract description 4
- 239000010881 fly ash Substances 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/008—Incineration of waste; Incinerator constructions; Details, accessories or control therefor adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/008—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for liquid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/05—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste oils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
-
- 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
- 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
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Water Supply & Treatment (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a three-waste coupling integrated treatment system which comprises a three-waste internal thermal reactor (1), a cooling flue (2), a desulfurization and dedusting discharge system (3) and an energy recovery system (4), wherein waste gas, waste residue and waste liquid can be combusted in the three-waste internal thermal reactor (1) to generate high-temperature flue gas, the high-temperature flue gas can enter the cooling flue (2) to release heat, the high-temperature flue gas after heat release can enter the desulfurization and dedusting discharge system (3), and the energy recovery system (4) can recover the heat released by the high-temperature flue gas in the cooling flue (2). The three-waste coupling integrated treatment system can simultaneously treat waste gas (flue gas), waste residues (slag, fly ash, coal gangue and the like) and waste liquid (sewage, sludge and the like) generated in the steel industry, and can recover the waste heat of the flue gas while eliminating sintering flue gas and other wastes in the steel industry, thereby realizing the integrated cooperative control of energy utilization and pollution control.
Description
Technical Field
The invention relates to a three-waste coupling integrated treatment system.
Background
In recent years, environmental protection policies have led to the move ahead, which has greatly promoted the pollution control process in the steel industry, and has derived a large amount of waste gas (flue gas), waste residues (slag, fly ash, coal gangue, etc.), waste liquids (sewage, sludge, etc.) while producing large quantities. In particular, the sintering process is used as a major energy consumption and pollution household of a steel mill, the energy consumption accounts for 25% of the total energy consumption of the steel mill, and the emission of sulfur dioxide and nitrogen oxides accounts for 60% and 48% of the total emission of steel production. These ecological environmental problems have largely restricted the health and sustained development of the steel industry, and therefore, there is a need to develop waste treatment technology in the steel industry to promote the green industrialization process of the steel industry.
The existing sintering process treatment technology mainly aims at flue gas pollutants, and SO is treated by serially connecting flue gas purification devices such as a desulfurizing tower, a dust remover and an SCR denitration reactor 2 、NO x And PM, etc. However, effective treatment measures for waste residues and waste liquid are lacked, and the flue gas purification devices additionally increase a large amount of material and energy consumption and generate new waste residues and waste liquid. Meanwhile, the emission temperature of the sintering flue gas is higher, and the existing treatment device cannot recycle the part of waste heat, so that the waste of resources is caused.
Disclosure of Invention
In order to simultaneously treat the three wastes (waste gas, waste residue and waste liquid), the invention provides a three-waste coupling integrated treatment system which can simultaneously treat the waste gas (flue gas), the waste residue (slag, fly ash, coal gangue and the like) and the waste liquid (sewage, sludge and the like) generated in the steel industry, and can recover the waste heat of the flue gas while eliminating the sintering flue gas and other wastes in the steel industry, thereby realizing the integrated cooperative control of energy utilization and pollution treatment.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a three wastes coupling integration processing system, includes three wastes internal heat reactor, cooling flue, desulfurization dust removal discharge system and energy recovery system, waste gas, waste residue and waste liquid can produce high temperature flue gas in the burning of three wastes internal heat reactor, high temperature flue gas can get into the cooling flue and release heat, after exothermic high temperature flue gas can get into desulfurization dust removal discharge system, energy recovery system can retrieve the heat that high temperature flue gas discharged in the cooling flue.
The three-waste internal thermal reactor is of a cylindrical structure, the bottom of the three-waste internal thermal reactor is provided with a waste gas inlet, the lower part of the three-waste internal thermal reactor is provided with a waste residue inlet, and the middle lower part of the three-waste internal thermal reactor is provided with a waste liquid inlet.
The lower part of the three-waste internal thermal reactor is also provided with a combustion-supporting gas inlet, the waste gas inlet is connected with the smoke outlet of the sintering machine through a first sintering smoke exhaust pipeline, and the combustion-supporting gas inlet is connected with the smoke outlet of the sintering machine through a second sintering smoke exhaust pipeline.
The upper end of the three-waste internal thermal reactor is provided with a smoke outlet, a cyclone dust collector is arranged between the three-waste internal thermal reactor and the cooling flue, a gas outlet of the cyclone dust collector is communicated with an inlet of the cooling flue, a gas inlet of the cyclone dust collector is communicated with the smoke outlet of the three-waste internal thermal reactor, and a slag discharge port of the cyclone dust collector is communicated with the lower part of the three-waste internal thermal reactor.
The high-temperature coal economizer, the SCR reactor and the low-temperature coal economizer are sequentially arranged in the cooling flue along the airflow direction, a first heat exchanger group is further arranged in the cooling flue, the first heat exchanger group comprises a first low-temperature superheater, a first high-temperature superheater and a first final superheater which are sequentially connected, and the first heat exchanger group is located between an inlet of the cooling flue and the high-temperature coal economizer.
The cooling flue is a vaporization cooling flue, a second heat exchanger group is further arranged in the cooling flue, the second heat exchanger group comprises a second low-temperature reheater and a second final-stage reheater which are sequentially connected, and the second heat exchanger group is located between an inlet of the cooling flue and the high-temperature economizer.
The cooling flue comprises a vaporization cooling flue section and a non-vaporization cooling flue section which are sequentially arranged along the airflow direction, the high-temperature economizer, the first heat exchanger group and the second heat exchanger group are all positioned in the vaporization cooling flue section, and the SCR reactor and the low-temperature economizer are all positioned in the non-vaporization cooling flue section.
The energy recovery system contains the steam turbine that connects gradually, the condenser, condensate pump, the oxygen-eliminating device and feed-water pump, the steam turbine contains the high pressure jar, intermediate pressure jar and low pressure jar, the export of feed-water pump in proper order with the low temperature economizer through first pipeline, the entry linkage with the high pressure jar again after high temperature economizer and first heat exchanger group link, the export of high pressure jar is connected with the entry linkage of intermediate pressure jar again after passing through the second pipeline and second heat exchanger group link, the export of intermediate pressure jar is through the entry linkage of third pipeline and condenser.
The energy recovery system contains the steam turbine, the condenser, condensate pump, the oxygen-eliminating device and the feed pump that connect gradually, and the steam turbine contains the high pressure jar, intermediate pressure jar and low pressure jar, and the export of feed pump is connected with the entry linkage of low temperature economizer, high temperature economizer and first heat exchanger group back in proper order through first pipeline again with the high pressure jar, and the export of high pressure jar is through the entry linkage of fourth pipeline with the intermediate pressure jar, and the export of intermediate pressure jar is through the entry linkage of third pipeline with the condenser.
The desulfurization and dust removal discharge system comprises a semi-dry desulfurization tower, a dust remover, an induced draft fan and a chimney which are sequentially connected in the airflow direction, or the desulfurization and dust removal discharge system comprises the induced draft fan, a wet desulfurization tower, a wet electric dust remover and the chimney which are sequentially connected in the airflow direction.
The invention has the beneficial effects that: the method has the advantages that sintering flue gas and other iron and steel industrial wastes are eliminated, simultaneously, the flue gas waste heat is recovered, a large amount of clean electric energy and high-temperature high-pressure steam are generated, and the integrated cooperative control of energy utilization and pollution treatment is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of an integrated three-waste coupling treatment system according to the present invention in example 1.
Figure 2 is a schematic representation of the three wastes autothermal reactor with a heat exchanger.
FIG. 3 is a schematic view of the three wastes coupling integrated treatment system of the present invention in example 2.
FIG. 4 is a schematic view of the three wastes coupling integrated treatment system of the present invention in example 3.
FIG. 5 is a schematic view of the three wastes coupling integrated treatment system of the present invention in example 4.
The reference numerals are explained below:
1. three-waste internal thermal reactor; 2. cooling the flue; 3. a desulfurization dust removal discharge system; 4. an energy recovery system; 5. sintering machine; 6. a cyclone dust collector;
11. an exhaust gas inlet; 12. a waste residue inlet; 13. a waste liquid inlet; 14. a combustion-supporting gas inlet; 15. a heat exchanger;
21. a high-temperature economizer; 22. an SCR reactor; 23. a low-temperature economizer; 24. a first heat exchanger group; 25. a second heat exchanger group; 26. a vaporizing cooling flue section; 27. a non-evaporative cooling flue section;
31. a semi-dry desulfurization tower; 32. a dust remover; 33. an induced draft fan; 34. a chimney; 35. a wet desulfurization tower; 36. a wet electric precipitator; 37. a gas-water heat exchanger; 38. a condenser;
41. a steam turbine; 42. a condenser; 43. a condensate pump; 44. a deaerator; 45. a feed pump; 46. a generator; 47. a high pressure heater; 48. a low pressure heater;
51. a first sintering smoke exhaust pipeline; 52. a second sintering smoke exhaust pipeline; 53. a blower;
71. a first pipeline; 72. a second pipeline; 73. a third pipeline; 74. a fourth pipeline;
411. a high pressure cylinder; 412. an intermediate pressure cylinder; 413. and a low pressure cylinder.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The utility model provides a three wastes coupling integration processing system, includes thermal reactor 1 in the three wastes, cooling flue 2, desulfurization dust removal discharge system 3 and energy recovery system 4, waste gas, waste residue and waste liquid can burn in thermal reactor 1 in the three wastes and produce high temperature flue gas, high temperature flue gas can get into cooling flue 2 and release heat, after releasing heat high temperature flue gas can get into desulfurization dust removal discharge system 3, and energy recovery system 4 can retrieve the heat that high temperature flue gas discharged in cooling flue 2, as shown in figure 1.
In this embodiment, the three-waste internal thermal reactor 1 is a cylindrical structure, the three-waste internal thermal reactor 1 can be a product in the prior art, the three-waste internal thermal reactor 1 has substantially the same structure as that of an existing furnace, a combustion chamber is arranged in the three-waste internal thermal reactor 1, a smoke exhaust port is arranged at the upper end of the three-waste internal thermal reactor 1, a waste gas inlet 11 is arranged at the bottom of the three-waste internal thermal reactor 1, a waste residue inlet 12 is arranged at the lower part of the three-waste internal thermal reactor 1, a waste liquid inlet 13 is arranged at the middle lower part of the three-waste internal thermal reactor 1, and a slag exhaust port can be arranged at the lower end of the three-waste internal thermal reactor 1.
In this embodiment, the lower portion of the three-waste internal thermal reactor 1 is further provided with a combustion-supporting gas inlet 14, the waste gas inlet 11 is connected with the smoke outlet of the sintering machine 5 through a first sintering smoke exhaust pipeline 51, and the combustion-supporting gas inlet 14 is connected with the smoke outlet of the sintering machine 5 through a second sintering smoke exhaust pipeline 52. The first sintering exhaust flue 51 and the second sintering exhaust flue 52 are both provided with a blower 53. The lower end of the three-waste internal thermal reactor 1 can also be provided with a waste residue inlet 12, and the lower part of the three-waste internal thermal reactor 1 can also be provided with a fuel inlet.
In this embodiment, a cyclone 6 is arranged between the three-waste internal thermal reactor 1 and the cooling flue 2, a gas outlet of the cyclone 6 is communicated with an inlet of the cooling flue 2, a gas inlet of the cyclone 6 is communicated with a smoke outlet of the three-waste internal thermal reactor 1, a slag discharge port of the cyclone 6 is communicated with the lower part of the three-waste internal thermal reactor 1, and a slag discharge port of the cyclone 6 is connected with a waste slag inlet 12 of the three-waste internal thermal reactor 1.
In this embodiment, a high-temperature economizer 21, an SCR reactor 22, and a low-temperature economizer 23 are sequentially disposed in the cooling flue 2 along the direction of the air flow (high-temperature flue gas), a first heat exchanger group 24 is further disposed in the cooling flue 2, the first heat exchanger group 24 includes a first low-temperature superheater, a first high-temperature superheater, and a first final superheater that are sequentially connected, and the first heat exchanger group 24 is located between the inlet of the cooling flue 2 and the high-temperature economizer 21.
In this embodiment, the cooling flue 2 is a vaporization cooling flue, a second heat exchanger group 25 is further disposed in the cooling flue 2, the second heat exchanger group 25 includes a second low-temperature reheater and a second final-stage reheater, which are sequentially connected, and the second heat exchanger group 25 is located between an inlet of the cooling flue 2 and the high-temperature economizer 21.
In this embodiment, the energy recovery system 4 includes a steam turbine 41, a condenser 42, a condensate pump 43, a deaerator 44, and a feed water pump 45, which are connected in sequence, the steam turbine 41 includes a high-pressure cylinder 411, an intermediate-pressure cylinder 412, and a low-pressure cylinder 413, an outlet of the feed water pump 45 is connected to an inlet of the high-pressure cylinder 411 after being connected to the low-temperature economizer 23, the high-temperature economizer 21, and the first heat exchanger group 24 in sequence through a first pipeline 71, an outlet of the high-pressure cylinder 411 is connected to an inlet of the intermediate-pressure cylinder 412 after being connected to the second heat exchanger group 25 through a second pipeline 72, and an outlet of the intermediate-pressure cylinder 412 is connected to an inlet of the condenser 42 through a third pipeline 73. Further, a generator 46 is connected to the steam turbine 41, a high-pressure heater 47 is provided between the feed water pump 45 and the low-temperature economizer 23, the high-pressure heater 47 is located on a first pipeline 71, and a low-pressure heater 48 is connected between the condensate pump 43 and the deaerator 44.
In this embodiment, the desulfurization and dust removal discharge system 3 includes a semi-dry desulfurization tower 31, a dust remover 32, an induced draft fan 33 and a chimney 34 which are connected in sequence along the airflow direction, and the high-temperature flue gas can be sequentially desulfurized, dedusted and discharged in the desulfurization and dust removal discharge system 3. The solid particles produced in the dust separator 32 can be fed to the three-waste autothermal reactor 1. The three waste internal thermal reactor 1 can also be provided with a heat exchanger 15, a first pipeline 71 can enter the three waste internal thermal reactor 1 and is connected with the heat exchanger 15, at the moment, the heat exchanger 15 is positioned between the high-temperature economizer 21 and the first heat exchanger group 24 on the first pipeline 71, and the outlet of the water feeding pump 45 is connected with the low-temperature economizer 23, the high-temperature economizer 21, the heat exchanger 15 and the first heat exchanger group 24 in sequence through the first pipeline 71 and then is connected with the inlet of the high-pressure cylinder 411. Alternatively, the first line 71 may not enter the three-waste autothermal reactor 1, as shown in FIG. 2.
The working process of the three wastes coupling integrated treatment system (also called as sintering flue gas three wastes coupling integrated treatment system) is described below.
The high-temperature flue gas from the sintering machine 5 is divided into two paths, one path enters the waste gas inlet 11 at the bottom of the three-waste internal thermal reactor 1 through the first sintering smoke exhaust pipeline 51, the other path enters the combustion-supporting gas inlet 14 at the middle lower part of the three-waste internal thermal reactor 1 through the second sintering smoke exhaust pipeline 52, solid waste is added from the waste residue inlet 12 at the lower part of the three-waste internal thermal reactor 1, and waste liquid is sprayed from the waste liquid inlet 13 at the middle part of the three-waste internal thermal reactor 1, as shown in fig. 1.
The three wastes (waste gas, waste residue and waste liquid) are combusted in the three-waste internal thermal reactor 1 to generate high-temperature flue gas, the high-temperature flue gas is discharged from the three-waste internal thermal reactor 1, then passes through the cyclone dust collector 6 and then enters the cooling flue 2, and the high-temperature flue gas is discharged from the tail part of the cooling flue 2 and sequentially enters the desulfurization and dust removal discharge system 3 to be discharged into the atmosphere.
Adding slag of a sintering machine, coal gangue, desulfurization solid waste, sludge and a proper amount of waste liquid into a three-waste internal thermal reactor 1, heating the internal thermal reactor 1 to ensure that the combustion temperature can reach 800-1000 ℃, directly burning and removing dioxin, VOCs and CO in sintering flue gas, introducing high-temperature flue gas into a cooling flue 2 provided with a multistage heat exchanger for waste heat recovery after passing through a cyclone dust collector 6, setting an SCR reactor 22 when the temperature of the flue gas in the cooling flue 2 is reduced to 300-400 ℃, and reducing the temperature of the flue gas to 110-140 ℃ after passing through a 1-level to 2-level vaporization cooling flue.
The tail desulfurization system can be selected by adopting a fluidized bed desulfurization method, a sodium-based dry method, a fixed bed method or a limestone-gypsum method, and the dust removal system can adopt bag dust removal, electric dust removal or wet electric dust removal. The waste gas generated by the desulphurization and dust removal system can be continuously filled into the three-waste internal thermal reactor 1 as bed material.
Deoxygenation feed water enters the cooling flue 2 through the feed water pump 45, sequentially passes through the low-temperature economizer 23, the high-temperature economizer 21 and the first heat exchanger group 24, generates subcritical steam, enters the high-pressure cylinder 411 of the steam turbine 41 to do work, the steam after doing work enters the cooling flue 2 again, passes through the second heat exchanger group 25, generates ultrahigh-temperature steam again, enters the intermediate pressure cylinder 412 of the steam turbine 41 to continue to do work, and therefore clean electric energy is generated. The steam discharged from the intermediate pressure cylinder 412 enters the low pressure cylinder 413 to continue to work, and the steam discharged from the low pressure cylinder 413 enters the condenser 42 to be converted into water, so that a steam-water cycle is formed.
Compared with the traditional three-waste incinerator, the process waste gas is used as an oxygen source, the waste heat of sintering flue gas is recovered, an air preheater is omitted, the exhaust gas temperature is reduced by about 40 ℃, and the heat loss is obviously reduced. The high-temperature reactor adopts low-oxygen low-nitrogen combustion, the temperature in the reactor is constant, the operation is stable, the emission of original pollutants is reduced, and the control difficulty of a subsequent flue gas treatment device is reduced. The energy working medium does work, so that the once reheating steam extraction is increased, and the energy utilization rate is improved by about 2 percent.
Example 2
The present embodiment is a modification of embodiment 1, and the main difference between the present embodiment and embodiment 1 is that the cooling flue 2 includes a vaporization cooling flue section 26 and a non-vaporization cooling flue section 27 which are sequentially arranged along the airflow direction, the high-temperature economizer 21, the first heat exchanger group 24 and the second heat exchanger group 25 are all located in the vaporization cooling flue section 26, and the SCR reactor 22 and the low-temperature economizer 23 are all located in the non-vaporization cooling flue section 27, as shown in fig. 3.
Other technical features of this embodiment are the same as those of embodiment 1, and this embodiment will not be described in detail for the sake of brevity.
Example 3
The present embodiment is a modification of embodiment 1, and the main difference between the present embodiment and embodiment 1 is that the outlet of the feed water pump 45 is connected to the low-temperature economizer 23, the high-temperature economizer 21, and the first heat exchanger group 24 in this order through the first pipeline 71, and then connected to the inlet of the high-pressure cylinder 411, the outlet of the high-pressure cylinder 411 is connected to the inlet of the intermediate pressure cylinder 412 through the fourth pipeline 74, and the outlet of the intermediate pressure cylinder 412 is connected to the inlet of the condenser 42 through the third pipeline 73. The cooling flue 2 does not contain a second heat exchanger package 25, as shown in fig. 4.
Other technical features of this embodiment are the same as those of embodiment 1, and this embodiment will not be described in detail for the sake of brevity.
Example 4
The present embodiment is a modification of embodiment 1, and the main difference between the present embodiment and embodiment 1 is that the desulfurization and dust removal discharge system 3 includes an induced draft fan 33, a wet desulfurization tower 35, a wet electric dust collector 36 and a chimney 34, which are connected in sequence, in the airflow direction. The desulfurization and dust removal discharge system 3 further comprises a gas-water heat exchanger 37 and a condenser 38, wherein the temperature rising section and the condenser 38 of the gas-water heat exchanger 37 are both positioned on the chimney 34, and the temperature reduction section of the gas-water heat exchanger 37 is positioned between the induced draft fan 33 and the wet desulfurization tower 35, as shown in fig. 5.
Other technical features of this embodiment are the same as those of embodiment 1, and this embodiment will not be described in detail for the sake of brevity.
It should be understood that the above description is only exemplary of the invention, and is not intended to limit the scope of the invention, so that the replacement of equivalent elements or equivalent changes and modifications made in the present invention should be included within the scope of the present invention. In addition, the technical features and the technical characteristics, the technical features and the technical scheme, the technical scheme and the technical scheme, and the embodiment of the invention can be freely combined and used.
Claims (10)
1. The three-waste coupling integrated treatment system is characterized by comprising a three-waste internal thermal reactor (1), a cooling flue (2), a desulfurization and dedusting discharge system (3) and an energy recovery system (4), wherein waste gas, waste residue and waste liquid can be combusted in the three-waste internal thermal reactor (1) to generate high-temperature flue gas, the high-temperature flue gas can enter the cooling flue (2) to release heat, the high-temperature flue gas after heat release can enter the desulfurization and dedusting discharge system (3), and the energy recovery system (4) can recover the heat released by the high-temperature flue gas in the cooling flue (2).
2. The three-waste coupling integrated treatment system according to claim 1, wherein the three-waste internal thermal reactor (1) is a cylindrical structure, the bottom of the three-waste internal thermal reactor (1) is provided with a waste gas inlet (11), the lower part of the three-waste internal thermal reactor (1) is provided with a waste residue inlet (12), and the middle lower part of the three-waste internal thermal reactor (1) is provided with a waste liquid inlet (13).
3. The three-waste coupling integrated treatment system according to claim 2, characterized in that the lower part of the three-waste internal thermal reactor (1) is further provided with a combustion-supporting gas inlet (14), the waste gas inlet (11) is connected with the smoke outlet of the sintering machine (5) through a first sintering smoke exhaust pipe (51), and the combustion-supporting gas inlet (14) is connected with the smoke outlet of the sintering machine (5) through a second sintering smoke exhaust pipe (52).
4. The three-waste coupling integrated treatment system according to claim 1, wherein a smoke vent is provided at the upper end of the three-waste internal thermal reactor (1), a cyclone (6) is provided between the three-waste internal thermal reactor (1) and the cooling flue (2), a gas outlet of the cyclone (6) is communicated with an inlet of the cooling flue (2), a gas inlet of the cyclone (6) is communicated with the smoke vent of the three-waste internal thermal reactor (1), and a slag vent of the cyclone (6) is communicated with the lower portion of the three-waste internal thermal reactor (1).
5. The three-waste coupling integrated treatment system according to claim 1, wherein a high temperature economizer (21), an SCR reactor (22) and a low temperature economizer (23) are sequentially arranged in the cooling flue (2) along the gas flow direction, a first heat exchanger set (24) is further arranged in the cooling flue (2), the first heat exchanger set (24) comprises a first low temperature superheater, a first high temperature superheater and a first final superheater which are sequentially connected, and the first heat exchanger set (24) is located between the inlet of the cooling flue (2) and the high temperature economizer (21).
6. The three-waste coupling integrated treatment system according to claim 5, wherein the cooling flue (2) is a vaporization cooling flue, a second heat exchanger group (25) is further disposed in the cooling flue (2), the second heat exchanger group (25) comprises a second low-temperature reheater and a second final reheater which are connected in sequence, and the second heat exchanger group (25) is located between the inlet of the cooling flue (2) and the high-temperature economizer (21).
7. The three-waste coupling integrated treatment system according to claim 6, wherein the cooling flue (2) comprises a vaporization cooling flue section (26) and a non-vaporization cooling flue section (27) which are sequentially arranged along the gas flow direction, the high-temperature economizer (21), the first heat exchanger set (24) and the second heat exchanger set (25) are all located in the vaporization cooling flue section (26), and the SCR reactor (22) and the low-temperature economizer (23) are all located in the non-vaporization cooling flue section (27).
8. The three-waste coupling integrated treatment system according to claim 6 or 7, wherein the energy recovery system (4) comprises a steam turbine (41), a condenser (42), a condensate pump (43), a deaerator (44) and a feed water pump (45) which are connected in sequence, the steam turbine (41) comprises a high pressure cylinder (411), an intermediate pressure cylinder (412) and a low pressure cylinder (413), an outlet of the feed water pump (45) is connected with the low temperature economizer (23), the high temperature economizer (21) and the first heat exchanger group (24) in sequence through a first pipeline (71) and then connected with an inlet of the high pressure cylinder (411), an outlet of the high pressure cylinder (411) is connected with an inlet of the intermediate pressure cylinder (412) after being connected with the second heat exchanger group (25) through a second pipeline (72), and then connected with an outlet of the intermediate pressure cylinder (412) through a third pipeline (73) and connected with an inlet of the condenser (42).
9. The three-waste coupling integrated treatment system according to claim 5, wherein the energy recovery system (4) comprises a steam turbine (41), a condenser (42), a condensate pump (43), a deaerator (44) and a feed water pump (45) which are connected in sequence, the steam turbine (41) comprises a high pressure cylinder (411), an intermediate pressure cylinder (412) and a low pressure cylinder (413), an outlet of the feed water pump (45) is connected with the inlet of the high pressure cylinder (411) after being connected with the low temperature economizer (23), the high temperature economizer (21) and the first heat exchanger group (24) in sequence through a first pipeline (71), an outlet of the high pressure cylinder (411) is connected with an inlet of the intermediate pressure cylinder (412) through a fourth pipeline (74), and an outlet of the intermediate pressure cylinder (412) is connected with an inlet of the condenser (42) through a third pipeline (73).
10. The three-waste coupling integrated treatment system according to claim 1, wherein the desulfurization and dust removal discharge system (3) comprises a semi-dry desulfurization tower (31), a dust remover (32), an induced draft fan (33) and a chimney (34) which are connected in sequence along the airflow direction, or the desulfurization and dust removal discharge system (3) comprises an induced draft fan (33), a wet desulfurization tower (35), a wet electric dust remover (36) and a chimney (34) which are connected in sequence along the airflow direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944747.7A CN115200019A (en) | 2022-08-08 | 2022-08-08 | Three wastes coupling integration processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210944747.7A CN115200019A (en) | 2022-08-08 | 2022-08-08 | Three wastes coupling integration processing system |
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| CN115200019A true CN115200019A (en) | 2022-10-18 |
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| CN202210944747.7A Pending CN115200019A (en) | 2022-08-08 | 2022-08-08 | Three wastes coupling integration processing system |
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