CN109575960B - Wet pressure quenching waste heat and gas recovery system - Google Patents
Wet pressure quenching waste heat and gas recovery system Download PDFInfo
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- CN109575960B CN109575960B CN201910014752.6A CN201910014752A CN109575960B CN 109575960 B CN109575960 B CN 109575960B CN 201910014752 A CN201910014752 A CN 201910014752A CN 109575960 B CN109575960 B CN 109575960B
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- 238000010791 quenching Methods 0.000 title claims abstract description 240
- 230000000171 quenching effect Effects 0.000 title claims abstract description 240
- 239000002918 waste heat Substances 0.000 title claims abstract description 81
- 238000011084 recovery Methods 0.000 title claims abstract description 44
- 239000002912 waste gas Substances 0.000 title claims abstract description 19
- 239000000571 coke Substances 0.000 claims abstract description 298
- 239000007789 gas Substances 0.000 claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 239000007921 spray Substances 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000004062 sedimentation Methods 0.000 claims description 12
- 238000011033 desalting Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003034 coal gas Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B45/00—Other details
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a wet-process pressure coke quenching waste heat and gas recovery system, which comprises a pressure coke quenching system, a waste heat recovery system and a gas recovery system, wherein the pressure coke quenching system comprises a coke guide, a track, a coke transporting vehicle, a lifting machine, a first moving platform, a lifting mechanism, a first coke quenching tank, a first small coke tank, a second moving platform, a second coke quenching tank, a second small coke tank, a water pump, a first switching valve, a second switching valve, a first-stage settler, a baffle plate, a first buffer tank and the like; through the recycling of the mixed gas, the concentration of the gas is improved, and the gas recycling is realized; the wet pressure coke quenching has more stable moisture content, improves the product quality and creates economic benefits; the invention realizes the recycling of the coke quenching waste heat and the coal gas, thereby forming an energy-saving, emission-reducing and comprehensive utilization coke quenching production system.
Description
Technical Field
The invention belongs to the technical field of coking, and particularly relates to a wet pressure quenching waste heat and gas recovery system.
Background
Along with the temperature of pushing coke out of a coke oven by the traditional wet quenching method at about 1000 ℃, the coke is transported into a quenching tower by a coke quenching car, sprayed and cooled by water at about 150 ℃ and then sent to a cooling table. In the cooling process of the latent heat of the red coke, a large amount of heat energy is wasted, so that not only is a certain pollution to the environment caused, but also the moisture content of the coke is unstable, and the quality of a product is influenced. In the dry quenching technology developed in recent years, red coke is cooled by inert gas, low-temperature inert gas is blown into a cooling chamber of a dry quenching furnace by a circulating fan to form red Jiao Cengna, heat of the red coke is absorbed and then is subjected to heat exchange by a waste heat boiler, steam is generated after the waste heat is absorbed to drive a turbine generator to generate electricity, and coke cooled by the inert gas is discharged from the bottom of the dry quenching furnace. The dry quenching technology utilizes the waste heat of red coke, but in order to ensure the safe operation of dry quenching, the gas generated during quenching is converted into carbon dioxide by the sucked air and enters a gas circulation system. The dry quenching technology not only can not fully utilize coal gas, but also has large equipment investment, high running cost and maintenance cost and high coke burning loss rate, and seriously affects the economic benefit of enterprises.
Disclosure of Invention
The invention aims to provide a wet-process pressure coke quenching waste heat and gas recovery system, which is used for solving the problems of environmental pollution and unstable coke quality caused by waste of traditional wet-process coke quenching heat energy in the prior art; the dry quenching technology has the problems of unavailable gas, large investment, high operation and maintenance cost, high coke burning loss rate and poor economic benefit.
The technical scheme adopted by the invention is that the wet-process pressure coke quenching waste heat and gas recovery system comprises a pressure coke quenching system, a waste heat recovery system and a gas recovery system, wherein the pressure coke quenching system comprises a coke guide, a track, a coke transporting vehicle, a lifting machine, a first moving platform, a lifting mechanism, a first coke quenching tank, a first small coke tank, a second moving platform, a second coke quenching tank, a second small coke tank, a water pump, a first switching valve, a second switching valve, a first-stage settler, a baffle plate, a first buffer tank and the like, the upper part of the first coke tank is provided with a first coke quenching cover, the upper part of the second coke tank is provided with a second coke quenching Jiao Gai, the first coke quenching cover and the second coke quenching tank are respectively connected with a lifting mechanism, the lifting mechanism is connected to a moving platform to realize automatic opening or closing of a coke quenching Jiao Gai, the first small coke tank is placed in the first coke quenching tank, and the second small coke tank is placed in the second coke tank to realize wet-process pressure coke quenching;
The waste heat recovery system consists of a first-stage settler, a baffle plate, a first buffer tank, a waste heat exchanger, a dust removal system, a steam buffer tank, a steam pressure gauge, a filter screen, a sedimentation tank, a circulating induced draft fan, a deaerator, a desalting water tank and a heat exchanger, wherein the first-stage settler is connected with the first buffer tank, the first buffer tank is connected with the waste heat exchanger, the waste heat exchanger is respectively connected with the deaerator and the steam buffer tank, the waste heat exchanger is connected with the circulating induced draft fan through the heat exchanger and a vacuum dehydrator, an inlet of the circulating induced draft fan is connected with a nitrogen pipeline, and under the action of the circulating induced draft fan, mixed gas is subjected to heat exchange with the waste heat exchanger in the first coke quenching tank or the second coke quenching tank to realize waste heat recovery and utilization;
The gas recovery system consists of a vacuum dehydrator, a circulating induced draft fan, a gas switching valve, a nitrogen pipeline, a gas detector and a gas buffer tank, wherein an inlet of the circulating induced draft fan is connected with an outlet of the vacuum dehydrator, an outlet of the circulating induced draft fan is connected with the nitrogen pipeline and the gas switching valve, the gas recovery system is also connected with the gas detector, the gas switching valve is connected with the gas buffer tank, and the lower part of the gas buffer tank of the vacuum dehydrator is connected with a sedimentation tank through a pipeline.
Further describing the invention, the pressure quenching system consists of a first quenching tank and a second quenching tank, and can also be an Nth quenching tank. The first small coke tank is placed in the first coke quenching tank, the second small coke tank is placed in the second coke quenching tank, the Nth small coke tank is placed in the Nth coke quenching tank, a first coke quenching cover is arranged at the top of the first coke quenching tank, a second coke quenching Jiao Gai is arranged at the top of the second coke quenching tank, and a lifting mechanism is arranged at the top of the coke quenching Jiao Gai to control the opening and closing of the coke quenching Jiao Gai.
The invention is further described, a water pump is arranged on the side surface of the first coke quenching tank and the second coke quenching tank in the pressure coke quenching system, the water pump is connected with a spray water pipe to the inside of the first coke quenching tank and the inside of the second coke quenching tank, a switching valve is arranged at the upper part of the first coke quenching tank and the upper part of the second coke quenching tank, switching work between the coke quenching tanks is realized, the upper part of the first coke quenching cover is connected with a first movable platform, and the upper part of the second coke quenching Jiao Gai is connected with a second movable platform, so that automatic opening and closing of the coke quenching tanks are realized.
For further description of the invention, in the waste heat recovery system, the middle of the first coke quenching tank and the second coke quenching tank is connected with a first-stage settler through a switching valve, a baffle plate is arranged in the first-stage settler, a filter screen is arranged at the lower part of the first-stage settler, the first-stage settler is also connected with a first buffer tank, and the filter screen is arranged in the first buffer tank and is connected with a sedimentation tank through a pipeline.
For further description of the invention, the first buffer tank in the waste heat recovery system is connected with the waste heat exchanger, the ash removal system is arranged in the waste heat exchanger, and the steam pipeline of the waste heat exchanger is connected with the steam buffer tank and then is connected with the user steam pipeline through the steam pressure gauge.
Further describing the invention, a waste heat exchanger in the waste heat recovery system is connected with a heat exchanger and a deaerator, an inlet of the deaerator is connected with an outlet of the heat exchanger, and an inlet of the heat exchanger is connected with an outlet of a desalting water tank.
Further describing the invention, the outlet of the heat exchanger is connected with the inlet of the vacuum dehydrator, the outlet of the vacuum dehydrator is connected with the circulating induced draft fan, the outlet of the circulating induced draft fan is connected with the nitrogen pipeline and the gas switching valve, the gas switching valve is also connected with the gas detector, the gas switching valve is connected with the gas buffer tank, and the lower part of the gas buffer tank of the vacuum dehydrator is connected with the sedimentation tank through the pipeline.
By adopting the technical scheme, the method has the following beneficial effects:
1. the wet pressure quenching reduces the waste of heat energy and realizes the utilization of waste heat;
2. Through the recycling of the mixed gas, the concentration of the gas is improved, and the gas recycling is realized;
3. the wet pressure coke quenching has more stable moisture content, improves the product quality and creates economic benefits;
4. The invention realizes the recycling of the coke quenching waste heat and the coal gas, thereby forming an energy-saving, emission-reducing and comprehensive utilization coke quenching production system.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
In the figure: 1. the coke guide, 2, the track, 3, the coke transporting vehicle, 4, the lifting machine, 5, the first moving platform, 6, the lifting mechanism, 7, the first coke quenching cover, 8, the first coke quenching tank, 9, the first small coke tank, 10, the water pump, 11, the gas buffer tank, 12, the first switching valve, 13, the detecting instrument, 14, the second moving platform, 15, the second quenching Jiao Gai, 16, the second coke quenching tank, 17, the second small coke tank, 18, the switching valve, 19, 20, 21, the gas detector, 22, a first-stage settler, 23, a baffle plate, 24, the first buffer tank, 25, the waste heat exchanger, 26, the ash removing system, 27, the steam buffer tank, 28, 29, the filter screen, 30, the 31, the induced draft fan, 32, the deaerator, 33, 34, 35, the vacuum dehydrator, 36, the nitrogen pipeline, 37, and 38 spray water pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The wet pressure coke quenching waste heat and gas recovery system comprises a pressure coke quenching system, a waste heat recovery system and a gas recovery system, wherein the pressure coke quenching system comprises a coke guide 1, a track 2, a coke transporting vehicle 3, a lifting machine 4, a first moving platform 5, a lifting mechanism 6, a first coke quenching tank 8, a first small coke tank 9, a second moving platform 14, a second coke quenching tank 16, a second small coke tank 17, a water pump 10, a first switching valve 12, a second switching valve 18, a first-stage settler 22, a baffle plate 23, a first buffer tank 24 and the like, the upper part of the first coke quenching tank 8 is provided with a first coke quenching cover 7, and the upper part of the second coke quenching tank 16 is provided with a second coke quenching Jiao Gai. The first coke quenching cover 7 and the second coke quenching tank 16 are respectively connected with a lifting mechanism 6, the lifting mechanism 6 is connected to a moving platform to realize automatic opening or closing of the quenching Jiao Gai, the first small coke tank 9 is placed in the first coke quenching tank 8, and the second small coke tank 17 is placed in the second coke quenching tank 16 to realize wet pressure quenching;
The waste heat recovery system consists of a first-stage settler 22, a baffle plate 23, a first buffer tank 24, a waste heat exchanger 25, a dust removal system 26, a steam buffer tank 27, a steam pressure gauge 28, a filter screen 29, a sedimentation tank 30, a circulating induced draft fan 31, a deaerator 32, a desalting water tank 33 and a heat exchanger 34, wherein the first-stage settler 22 is connected with the first buffer tank 24, the first buffer tank 24 is connected with the waste heat exchanger 25, the waste heat exchanger 25 is respectively connected with the deaerator 32 and the steam buffer tank 27, the waste heat exchanger 25 is connected with the circulating induced draft fan 31 through the heat exchanger 34 and a vacuum dehydrator 35, an inlet of the circulating induced draft fan 31 is connected with a nitrogen pipeline 36, and under the action of the circulating induced draft fan 31, mixed gas exchanges heat with the waste heat exchanger 25 in the first quenching tank 8 or the second quenching tank 16 to realize waste heat recovery utilization;
The gas recovery system comprises a vacuum dehydrator 35, a circulating induced draft fan 31, a gas switching valve 19, a nitrogen pipeline 36, a gas detector 21 and a gas buffer tank 11, wherein an inlet of the circulating induced draft fan 31 is connected with an outlet of the vacuum dehydrator 35, an outlet of the circulating induced draft fan 31 is connected with the nitrogen pipeline 36 and the gas switching valve 19 and is also connected with the gas detector 21, the gas switching valve 21 is connected with the gas buffer tank 11, and the lower part of the gas buffer tank 11 of the vacuum dehydrator 35 is connected with a sedimentation tank 30 through a pipeline.
The pressure coke quenching system consists of a first coke quenching tank 8 and a second coke quenching tank 16, and can also be an Nth coke quenching tank, wherein a first small coke tank 9 is placed in the first coke quenching tank 8, a second small coke tank 17 is placed in the second coke quenching tank 16, the Nth small coke tank is placed in the Nth coke quenching tank, a first coke quenching cover 7 is arranged at the top of the first coke quenching tank 8, a second coke quenching Jiao Gai is arranged at the top of the second coke quenching tank 16, and a lifting mechanism 6 is arranged at the top of a coke quenching Jiao Gai to control the opening and closing of a coke quenching Jiao Gai.
The side surfaces of a first coke quenching tank 8 and a second coke quenching tank 16 in the pressure coke quenching system are provided with a water pump 10, the water pump 10 is connected with a spray water pipe to the inside of the first coke quenching tank 8 and the inside of the second coke quenching tank 16, the upper parts of the first coke quenching tank 8 and the second coke quenching tank 16 are provided with a switching valve 12, the lower parts of the first coke quenching tank 8 and the second coke quenching tank 16 are provided with a switching valve 20, switching work between the coke quenching tanks is realized, the upper part of a first coke quenching cover 8 is connected with a first movable platform 5, and the upper part of a second coke quenching cover Jiao Gai is connected with a second movable platform 14, so that automatic opening and closing of the coke quenching tanks are realized.
In the waste heat recovery system, the middle of the first coke quenching tank 8 and the second coke quenching tank 16 is connected with a first-stage settler 22 through a first switching valve 12, a baffle plate 23 is arranged in the first-stage settler 22, a filter screen 29 is arranged at the lower part of the first-stage settler 22, the first-stage settler 22 is also connected with a first buffer tank 24, and the filter screen 29 is arranged in the first buffer tank 24 and is connected with a sedimentation tank 30 through a pipeline.
The first buffer tank 24 in the waste heat recovery system is connected with the waste heat exchanger 25, the ash removal system 26 is arranged in the waste heat exchanger 25, and a steam pipeline of the waste heat exchanger 25 is connected with the steam buffer tank 27 and then is connected with a user steam pipeline through the steam pressure gauge 28.
In the waste heat recovery system, a waste heat exchanger 25 is connected with a heat exchanger 34 and a deaerator 32, an inlet of the deaerator 32 is connected with an outlet of the heat exchanger 34, and an inlet of the heat exchanger 34 is connected with an outlet of a desalting water tank 33.
The outlet of the heat exchanger 34 is connected with the inlet of the vacuum dehydrator 35, the outlet of the vacuum dehydrator 35 is connected with the circulating induced draft fan 31, the outlet of the circulating induced draft fan 31 is connected with the nitrogen pipeline 36 and the gas switching valve 19, the gas dehydrator is also connected with the gas detector 21, the gas switching valve 21 is connected with the gas buffer tank 11, and the lower part of the gas buffer tank 11 of the vacuum dehydrator 35 is connected with the sedimentation tank 30 through a pipeline.
The coke guide 1 of the pressure quenching system intercepts red coke in small coke tanks (a first small coke tank 9 and a second small coke tank 17), and the small coke tanks (the first small coke tank 9 and the second small coke tank 17) are placed in the coke conveying vehicle 3 and are used for conveying coke; the lifting machine 4 is arranged at the upper part of the first coke quenching tank 8 and the second coke quenching tank 16 and can move back and forth between the coke quenching tanks (the first coke quenching tank 8 and the second coke quenching tank 16); the top parts of the first coke quenching tank 8 and the second coke quenching tank 16 are provided with a quenching Jiao Gai (a first coke quenching cover 7 and a second quenching Jiao Gai) and a quenching Jiao Gai (a first coke quenching cover 7 and a second quenching Jiao Gai) are connected with a lifting mechanism 6 to realize the opening and closing of a quenching Jiao Gai (a first coke quenching cover 7 and a second quenching Jiao Gai 15); the upper part of the quenching Jiao Gai (the first quenching cover 7 and the second quenching Jiao Gai) is provided with a detection instrument 13 and a spray water pipe 38, and the spray water pipe 38 is connected inside the quenching Jiao Gai (the first quenching cover 7 and the second quenching Jiao Gai); the side surfaces of the coke quenching tanks (the first coke quenching tank 8 and the second coke quenching tank 16) are respectively connected with a spray water pipe 38, the spray water pipe 38 is connected with a water pump 10, and electric valves are arranged on the spray water pipes 38 to realize automatic control; a switching valve is connected between the first coke quenching tank 8 and the second coke quenching tank 16 and is used for switching the two coke quenching tanks (the first coke quenching tank 8 and the second coke quenching tank 16), a pipeline is arranged between the two coke quenching tanks (the first coke quenching tank 8 and the second coke quenching tank 16) and is connected with a primary settler 22, the primary settler 22 is connected with a first buffer tank 24 through a first switching valve 12, and the first buffer tank 24 is connected with a waste heat exchanger 25 through a valve; the waste heat exchanger 25 is connected with a vacuum dehydrator 35, the vacuum dehydrator 35 is connected with a circulating induced draft fan 31, and the outlets of the circulating induced draft fan 31 are respectively connected with the lower parts of two coke quenching tanks (the first coke quenching tank 8 and the second coke quenching tank 16) through valves.
The waste heat recovery system is connected between the first buffer tank 24 and the vacuum dehydrator 35, the inlet of circulating water of the waste heat exchanger 25 is connected with the outlet of the deaerator 32, the inlet of the deaerator 32 is connected with the outlet of a pipeline in the heat exchanger 34, and the water inlet pipeline of the heat exchanger 34 is connected with the water supply system of the desalting water tank 33; the steam outlet of the waste heat exchanger 3425 is connected with a steam buffer tank 27, a pipeline provided with a steam pressure gauge 28 is connected with a user steam pipeline interface, and the gas recovery system is connected between the vacuum dehydrator 35 and the gas buffer tank 11; the cooled waste gas enters a vacuum dehydrator 35 after passing through a heat exchanger 34, and enters a circulating induced draft fan 31 after dehydration, an outlet of the circulating induced draft fan 31 is connected with a gas detector 21 and a switching valve II 18, the gas detector 21 mainly detects the gas content, the gas detector is automatically switched to a gas buffer tank 11 when the detected data meets the requirement, a lifting mechanism 6 is arranged on a coke transporting vehicle 3 of the pressure quenching system, the lifting mechanism 6 is mainly used for driving the coke transporting vehicle 3 to walk, the lifting mechanism 6 is used for discharging coke from a small coke tank (a first small coke tank 9 and a second small coke tank 17), in addition, a brake control system and a limit control system are arranged on the coke transporting vehicle 3, a lifting machine 4, a first coke quenching tank 8 and a second coke quenching tank 16 are arranged in a coke quenching workshop of the pressure coke quenching system; the upper top parts of the first coke quenching tank 8 and the second coke quenching tank 16 are respectively provided with a detection instrument 13, an air inlet valve, a safety valve and a spray water pipe 38, the spray water pipe 38 is connected with the spray water pipe 38 at the side surfaces and the bottom of the first coke quenching tank 8 and the second coke quenching tank 16 in the first coke quenching tank 8 and the second coke quenching tank 16, the main pipe of the spray water pipe 38 is provided with the detection instrument 13, a nitrogen pipeline 36 and an electric valve, the spray water pipe 38 is connected in the first coke quenching tank 8 and the second coke quenching tank 16, the first small coke tank 9 and the second small coke tank 17 are arranged in the first coke quenching tank 8 and the second coke quenching tank 16, the periphery of the first small coke tank 9 and the second small coke tank 17 is fully provided with small holes, so that cooling water and steam can permeate into coke during spraying, the outlets of the first coke quenching tank 8 and the second coke quenching tank 16 are respectively connected with a pneumatic switching valve, the middle of the two pneumatic switching valves is connected to the primary settler 22 through a pipeline, the lower parts of the first coke quenching tank 8 and the second coke quenching tank 16 are circulating waste gas inlets, the outlets of the circulating induced draft fan 31 and the inlets of the gas buffer tank 11 are respectively connected, in addition, the inlets of the gas buffer tank 11 are connected with the gas detector 21 meter 13 and the valves, the pipeline in the middle of the two coke quenching tanks is connected with the primary settler 22, and the primary settler 22 is connected with the waste gas buffer tank through the valve. The primary settler 22 is formed by knotting refractory materials, a cooling pipeline is arranged at the lower part of the settler and used for cooling the coke powder which is small in sedimentation, an outlet of the primary settler 22 is connected with an inlet of the first buffer tank 24, the upper part of the first buffer tank 24 is connected with a nitrogen pipeline 36 and a detection instrument 13, and a coke powder filter screen 29 and a waste water outlet are arranged at the lower part of the first buffer tank 24. The outlet of the first buffer tank 24 is connected with the waste gas inlet of the waste heat exchanger 3425, the waste gas outlet of the waste heat exchanger 3425 is connected with the vacuum dehydrator 35 through the heat exchanger 34, and the steam outlet is connected with the steam buffer tank 27 and then is connected with a user steam pipeline. The waste heat exchanger, 25 circulating water import connection deaerator 32, deaerator 32 connect heat exchanger 34, and desalting water tank 33 and pipeline are connected to heat exchanger 34, vacuum dehydrator 35 connects circulation draught fan 31, there is nitrogen gas pipeline 36 on the import pipeline of circulation draught fan 31, installs electric valve on the nitrogen gas pipeline 36, detects qualified coal gas through gas detector 21, gets into in the gas buffer tank 11 through gas switching valve 19, and the coke after the cooling is carried to cooling table 37 through the belt behind little burnt jar 9 of first little burnt jar 17 or second and the fortune burnt car 33.
In the invention, red coke from a coke oven flows into a first small coke tank 9 or a second small coke tank 17 on a coke transporting vehicle 3 after being intercepted by a coke blocking vehicle 1, the first small coke tank 9 or the second small coke tank 17 is transported to a coke quenching vehicle by the coke transporting vehicle 3, a lifting machine 4 lifts the red coke to the top of a first coke quenching tank 8 or a second coke quenching tank 16, a first coke quenching cover 7 and a second coke quenching Jiao Gai are respectively and automatically opened, and the small coke tanks are placed in the first coke quenching tank 8 or the second coke quenching tank 16 to prepare for quenching.
After the first small coke tank 9 or the second small coke tank 17 is placed in the coke quenching tank, the first coke quenching cover 7 and the second coke quenching cover Jiao Gai are automatically closed, a spraying system of the first coke quenching tank 8 or the second coke quenching tank 16 automatically sprays, steam and other mixed gases are generated, and under the action of a circulating induced draft fan 31, the mixed gases enter a waste heat exchanger 25 for heat energy exchange; the desalted water from the deaerator 32 passes through the waste heat exchanger 25 to generate steam which enters the steam buffer tank 27 for use by a user.
The mixed gas after passing through the waste heat exchanger 25 is cooled to about 180 ℃, enters the vacuum dehydrator 35 for dehydration, enters the gas buffer tank 11 through the circulating induced draft fan 31, and the mixed gas with low gas content is cooled by the bottom of the first quenching tank 8 or the second quenching tank 16 in a circulating way after passing through the switching valve II 20.
The red coke from the coke oven flows into a small coke tank on the coke transporting vehicle 3 after being intercepted by the coke guide vehicle 1, the small coke tank is transported to a coke quenching vehicle by the coke transporting vehicle 1, the small coke tank is lifted to the top of the coke quenching tank by the lifting machine 4, the first coke quenching cover 7 and the second coke quenching cover Jiao Gai are respectively and automatically opened, and the small coke tank is placed in the first coke quenching tank 8 and the second coke quenching tank 16 to be quenched. 16. The novel process for wet pressure quenching and simultaneous recovery of waste heat and gas according to claim 1. The method is characterized in that after a first small coke tank 9 or a second small coke tank 17 is placed in a coke quenching tank, a first coke quenching cover 7 and a second coke quenching cover Jiao Gai are automatically closed, a spraying system of the first coke quenching tank 8 or the second coke quenching tank 16 automatically sprays, steam and other mixed gases are generated, and under the action of a circulating induced draft fan 31, the mixed gases enter a waste heat exchanger 25 for heat energy exchange; the desalted water from the deaerator 32 passes through the waste heat exchanger 25 to generate steam which enters the steam buffer tank 27 for use by a user.
The mixed gas passing through the waste heat exchanger 25 is cooled to about 180 ℃, enters the vacuum dehydrator 35 for dehydration, enters the gas buffer tank 11 through the circulating induced draft fan 31,
The mixed gas with low gas content is circularly cooled through the bottom of the first quenching tank 8 or the second quenching tank 16 after passing through the second switching valve 20. 18. The novel process for wet pressure quenching and simultaneous recovery of waste heat and gas according to claim 1. The gas buffer tank is characterized in that qualified gas is detected by a gas detector and enters the gas buffer tank 11 through a gas switching valve 19. The cooled coke is transported to the cooling table 37 by the first small coke tank 9 or the second small coke tank 17 and the coke transporting vehicle 3, and then transported to a finished product warehouse via a belt.
While the basic principles and main features of the present invention have been described above, it will be understood by those skilled in the art that the present invention is not limited by the above-described embodiments, which are described in the foregoing description merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (5)
1. The wet-process pressure coke quenching waste heat and gas recovery system is characterized by comprising a pressure coke quenching system, a waste heat recovery system and a gas recovery system, wherein the pressure coke quenching system comprises a coke guide, a track, a coke transporting vehicle, a lifting machine, a first moving platform, a lifting mechanism, a first small coke tank, a second moving platform, a second coke tank, a second small coke tank, a water pump, a first switching valve, a second switching valve, a first-stage settler, a baffle plate and a first buffer tank, the upper part of the first coke tank is provided with a first coke quenching cover, the upper part of the second coke tank is provided with a second coke quenching Jiao Gai, the first coke quenching cover and the second coke tank are respectively connected with the lifting mechanism, the lifting mechanism is connected to a moving platform, the automatic opening or closing of the coke quenching Jiao Gai is realized, the first small coke tank is placed in the first coke tank, and the second small coke tank is placed in the second coke tank;
The waste heat recovery system consists of a first-stage settler, a baffle plate, a first buffer tank, a waste heat exchanger, a dust removal system, a steam buffer tank, a steam pressure gauge, a filter screen, a sedimentation tank, a circulating induced draft fan, a deaerator, a desalting water tank and a heat exchanger, wherein the first-stage settler is connected with the first buffer tank, the first buffer tank is connected with the waste heat exchanger, the waste heat exchanger is respectively connected with the deaerator and the steam buffer tank, the waste heat exchanger is connected with the circulating induced draft fan through the heat exchanger and a vacuum dehydrator, an inlet of the circulating induced draft fan is connected with a nitrogen pipeline, and under the action of the circulating induced draft fan, mixed gas is subjected to heat exchange with the waste heat exchanger in the first coke quenching tank or the second coke quenching tank to realize waste heat recovery and utilization;
The gas recovery system consists of a vacuum dehydrator, a circulating induced draft fan, a gas switching valve, a nitrogen pipeline, a gas detector and a gas buffer tank, wherein an inlet of the circulating induced draft fan is connected with an outlet of the vacuum dehydrator, an outlet of the circulating induced draft fan is connected with the nitrogen pipeline and the gas switching valve, the gas recovery system is also connected with the gas detector, the gas switching valve is connected with the gas buffer tank, and the lower part of the gas buffer tank of the vacuum dehydrator is connected with a sedimentation tank through a pipeline;
The pressure coke quenching system consists of an Nth coke quenching tank, an Nth small coke tank is arranged in the Nth coke quenching tank, a first coke quenching cover is arranged at the top of the first coke quenching tank, a second coke quenching cover Jiao Gai is arranged at the top of the second coke quenching tank, and a lifting mechanism is arranged at the top of the coke quenching Jiao Gai to control the opening and closing of the coke quenching Jiao Gai;
The side surfaces of a first coke quenching tank and a second coke quenching tank in the pressure coke quenching system are provided with water pumps, the water pumps are connected with spray water pipes to the interiors of the first coke quenching tank and the second coke quenching tank, the upper parts of the first coke quenching tank and the second coke quenching tank are provided with switching valves, the lower parts of the first coke quenching tank and the second coke quenching tank are provided with switching valves to realize switching work among the coke quenching tanks, the upper part of a first coke quenching cover is connected with a first movable platform, and the upper part of a second coke quenching cover Jiao Gai is connected with a second movable platform.
2. The wet pressure coke quenching waste heat and gas recovery system according to claim 1, wherein in the waste heat recovery system, the middle of the first coke quenching tank and the second coke quenching tank is connected with a primary settler through a switching valve, a baffle plate is arranged in the primary settler, a filter screen is arranged at the lower part of the primary settler, the primary settler is also connected with a first buffer tank, and the filter screen is arranged in the first buffer tank and is connected with a sedimentation tank through a pipeline.
3. The wet pressure quenching waste heat and gas recovery system according to claim 1, wherein a first buffer tank in the waste heat recovery system is connected with a waste heat exchanger, an ash cleaning system is arranged in the waste heat exchanger, and a steam pipeline of the waste heat exchanger is connected with a steam buffer tank and then is connected with a user steam pipeline through a steam pressure gauge.
4. The wet pressure quenching waste heat and gas recovery system according to claim 1, wherein a waste heat exchanger in the waste heat recovery system is connected with a heat exchanger and a deaerator, an inlet of the deaerator is connected with an outlet of the heat exchanger, and an inlet of the heat exchanger is connected with an outlet of a desalting water tank.
5. The wet pressure quenching waste heat and gas recovery system according to claim 1, wherein an outlet of the heat exchanger is connected with an inlet of a vacuum dehydrator, and an outlet of the vacuum dehydrator is connected with a circulating induced draft fan.
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