CN111720838A - Flue gas waste heat cascade utilization system capable of being applied to raw coke oven gas recycling - Google Patents

Flue gas waste heat cascade utilization system capable of being applied to raw coke oven gas recycling Download PDF

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Publication number
CN111720838A
CN111720838A CN202010524327.4A CN202010524327A CN111720838A CN 111720838 A CN111720838 A CN 111720838A CN 202010524327 A CN202010524327 A CN 202010524327A CN 111720838 A CN111720838 A CN 111720838A
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China
Prior art keywords
waste heat
flue gas
gas
preheater
psa
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CN202010524327.4A
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Chinese (zh)
Inventor
杜建吉
靳庆麦
张蕴
季哲
房会伟
张清奎
杜建芳
魏同勇
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Shandong Tongzhi Innovation Energy Technology Co ltd
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Shandong Tongzhi Innovation Energy Technology Co ltd
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Priority to CN202010524327.4A priority Critical patent/CN111720838A/en
Publication of CN111720838A publication Critical patent/CN111720838A/en
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    • 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
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • 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
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • 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
    • F22D1/36—Water and air preheating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2204/00—Supplementary heating arrangements
    • F23G2204/10—Supplementary heating arrangements using auxiliary fuel
    • F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/20—Waste heat recuperation using the heat in association with another installation
    • F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
    • 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
    • Y02E20/12—Heat utilisation in combustion or incineration of waste

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Air Supply (AREA)

Abstract

The utility model provides a can be applied to flue gas waste heat cascade utilization system of raw coke oven gas resourceization, from the past backward, be equipped with valves system (100) in proper order, burn system (101), exhaust-heat boiler system (102), air heater system (103), PSA tail gas preheater system (104), economizer system (105), draught fan system (106) and chimney system (107), in addition, combustion-supporting air can get into air heater system (103) heat transfer through air heater inlet pipeline (312) and send into through air heater outlet pipeline (131) and burn system (101) and tail gas, the accessory substance mixes and burns in order to reduce fuel gas consumption. The waste heat boiler system (102) utilizes the raw material water from the economizer system (105) to produce steam as a byproduct. The system improves the recycling efficiency of the flue gas waste heat, and the energy-saving benefit is more obvious.

Description

Flue gas waste heat cascade utilization system capable of being applied to raw coke oven gas recycling
Technical Field
The invention relates to the technical field of flue gas waste heat recycling, in particular to a flue gas waste heat gradient utilization system capable of being applied to raw coke oven gas recycling.
Background
China has relatively rich coal resources, large coke demand and large loading capacity of coke ovens, and generates a large amount of 'raw coke oven gas'. Crude gas H2The content of CO is large, the heat value is high, the prior raw coke oven gas is mainly subjected to simple combustion or even directly subjected to emptying without combustion, so that the environment is polluted, and resources are greatly wasted. The reasonable resource way of the raw coke oven gas is to prepare Ethylene Glycol (EG) by dimethyl oxalate (DMO) process. The waste gas and waste liquid of the process for preparing EG by DMO have complex components and higher pollutant content, and the incineration harmless treatment is required according to the flammability standard of hazardous waste (GB5085.4) the general rules of hazardous waste identification standard (GB5085.7) the incineration pollution control standard of hazardous waste (GB18484-2001) and the like.
Moreover, the oxygen content in the boiler exhaust gas has a large influence on the incineration treatment. When the oxygen content of the flue gas is lower, the air quantity is insufficient, the combustion is insufficient, and the phenomenon of flue gas bias flow is generated.
Therefore, it is necessary to develop a system which can be used for the flue gas harmlessness, waste heat recovery and utilization, energy conservation, environmental protection, economy and feasibility of the raw coke oven gas resource.
The prior art generally adopts a series-parallel connection mode for treating flue gas or tail gas, and refer to fig. 1. Flue gas/tail gas from the waste heat boiler system 102 is subjected to 303: one path reaches the air preheater system 103A through the air preheater flue gas inlet pipeline 303A; through a PSA preheater flue gas inlet line 304-1 to a PSA tail gas preheater system 104-1; through a PSA preheater flue gas inlet line 304-2 to a PSA tail gas preheater system 104-2; to the chimney system 107 via a chimney inlet line 307; the other path reaches the air preheater system 103B through an air preheater flue gas inlet pipeline 303B; to the economizer system 105-1 via an economizer flue gas inlet line 305-1; to the economizer system 105-2 via an economizer flue gas inlet line 305-2; to the stack system 107 via a stack inlet line 307. In the treatment mode, the flue gas/tail gas independently passes through the PSA tail gas preheater system and the economizer system, so that the cascade recycling of the flue gas waste heat is not facilitated, and the energy waste phenomenon exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides the flue gas waste heat gradient utilization system which can be applied to raw coke oven gas resource, can meet the requirement of burning byproducts alone and the requirement of no extra fuel gas consumption during working condition or tail gas/byproduct unified burning treatment, and has more obvious energy-saving benefit. The phenomena of 'flue gas bias flow' and 'carbon separation' of the flue gas are more easily avoided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a flue gas waste heat gradient utilization system applicable to raw gas recycling comprises a valve bank system, an incineration system, a waste heat boiler system, an air preheater system, a PSA tail gas preheater system, an economizer system, an induced draft fan system and a chimney system;
pollutants to be treated enter a valve group system through a smoke pipeline, a pressure and flow stabilizing device is arranged in the valve group system, the pollutants after pressure and flow stabilization enter an incineration system through an incinerator smoke inlet pipeline, and then smoke sequentially passes through a waste heat boiler system, an air preheater system, a PSA tail gas preheater system and an economizer system and is finally discharged through an induced draft fan system and a chimney system.
In the cascade utilization system for flue gas waste heat, the valve bank system comprises one or more of a waste gas valve bank, a waste liquid valve bank and a fuel gas valve bank. The conveying pipeline of each valve group is provided with a stop valve, a filter, a pressure reducing valve, a buffer tank, a filter, a temperature and pressure monitoring and emergency stop valves. The purpose of stabilizing pressure and flow can be achieved through the action of equipment such as a pressure reducing valve, a buffer tank and the like.
In the cascade utilization system for flue gas waste heat, the economizer system is connected with an economizer water inlet pipeline and a waste heat boiler water inlet pipeline, and the waste heat boiler water inlet pipeline is connected with the waste heat boiler system. The economizer system receives flue gas or tail gas exhausted by the PSA tail gas preheater system through an economizer flue gas inlet pipeline, absorbs heat of the flue gas or tail gas to supplement water for heating the waste heat boiler system, and further reduces energy consumption of the system.
In the cascade utilization system for flue gas waste heat, the air preheater system is connected with an air preheater inlet pipeline and an air preheater outlet pipeline, the air preheater outlet pipeline is connected with the incineration system, combustion air enters the air preheater system from the air preheater inlet pipeline for heat exchange and then is sent into the incineration system through the air preheater outlet pipeline, and the combustion air is mixed with tail gas and byproducts in the incineration system for combustion so as to reduce the consumption of fuel gas.
In the cascade utilization system for flue gas waste heat, the PSA tail gas preheater system is connected to a PSA preheater inlet line and a PSA preheater outlet line, and PSA gas enters the PSA tail gas preheater system from the PSA preheater inlet line and is discharged from the PSA preheater outlet line.
In the cascade utilization system for flue gas waste heat, one or more of the air preheater system, the PSA tail gas preheater system and the economizer system are arranged in parallel, so that the recovery efficiency of the flue gas waste heat is improved.
Preferably, the air preheater system, the PSA tail gas preheater system and the economizer system are located in the same order in each parallel line.
The cascade utilization system for the waste heat of the flue gas further comprises a fuel supply system, wherein the fuel supply system supplies fuel gas to the incineration system through a fuel gas supply pipeline, and the fuel supply system can be used as an ignition lamp and a pilot burner.
The main process flow of the flue gas waste heat cascade utilization system comprises the following steps:
compared with the prior art, the invention has the advantages that:
1. the cascade utilization system for the flue gas waste heat improves the recycling efficiency of the flue gas waste heat through the cascade design flue gas waste heat utilization system, and has more obvious energy-saving benefit.
2. According to the flue gas waste heat cascade utilization system, combustion-supporting air is preheated by the air preheater and then is sent into the incineration system, so that the working condition of incinerating tail gas or one of byproducts independently or incinerating two waste gases of the tail gas or the byproduct simultaneously can be met, and additional fuel gas consumption is not required under the two working conditions.
3. The flue gas waste heat cascade utilization system, the air preheater system, the PSA tail gas preheater system and the economizer system can adopt a parallel connection mode to reduce the load of a single heat exchanger. And the heat exchange area of single equipment is less, and bearing demand, area are little, and convenient manufacturing, transportation, the investment is lower.
4. The cascade utilization system of the flue gas waste heat, the air preheater system, the PSA tail gas preheater system and the economizer system are consistent in position sequence on each parallel line, and the phenomena of flue gas bias flow and flue gas carbon separation can be effectively avoided.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
FIG. 1 is a schematic diagram of a prior art process;
FIG. 2 is a schematic diagram of the overall process of example 1 of the present invention;
FIG. 3 is a schematic diagram of the series process of FIG. 2;
the components represented by the reference numerals in the figures are:
100. valve train system, 101, incineration system, 102, waste heat boiler system, 103, air preheating system, 104, PSA tail gas preheating system, 105, economizer system, 106, induced draft fan system, 107, chimney system, 108, fuel supply system, 300, flue gas line, 301, incinerator flue gas inlet line, 302, waste heat boiler flue gas inlet line, 303, air preheating flue gas inlet line, 304, PSA tail gas preheating flue gas inlet line, 305, economizer flue gas inlet line, 306, induced draft fan inlet line, 307, chimney inlet line, 308, chimney outlet line, 309, economizer water inlet line, 310, waste heat boiler water inlet line, 311, waste heat boiler steam line, 312, air preheater inlet line, 313, air preheater outlet line, 314, PSA tail gas preheater inlet line, 315, PSA tail gas preheater outlet line, 316, PSA tail gas preheater outlet line, 302, waste heat boiler water inlet line, and flue gas inlet line, A fuel gas supply line.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
Example 1
Referring to fig. 2, the flue gas waste heat gradient utilization system applicable to raw coke oven gas recycling in the embodiment includes a valve bank system 100, an incineration system 101, a waste heat boiler system 102, an air preheater system 103, a PSA tail gas preheater system 104, an economizer system 105, an induced draft fan system 106, a chimney system 107 and a fuel supply system.
Pollutants to be treated enter the valve group system 100 through a flue gas pipeline, a pressure and flow stabilizing device is arranged in the valve group system 100, the pollutants after pressure and flow stabilization enter the incineration system 101 through an incinerator flue gas inlet pipeline 301, and then the flue gas sequentially passes through a waste heat boiler system 102, an air preheater system 103, a PSA tail gas preheater system 104 and an economizer system 105, and finally is discharged through an induced draft fan system 106 and a chimney system 107. The pollutants in this embodiment include flue gas, tail gas, or other by-products, and for convenience of description, the flue gas will be referred to hereinafter.
In this embodiment, the valve assembly system 100 includes one of an exhaust valve assembly, a waste valve assembly, and a fuel gas valve assembly. The conveying pipeline of each valve group is provided with a stop valve, a filter, a pressure reducing valve, a buffer tank, a filter, a temperature and pressure monitoring and emergency stop valves. The purpose of stabilizing pressure and flow can be achieved through the action of equipment such as a pressure reducing valve, a buffer tank and the like. The various devices and combinations used in the valve train system 100 are well known in the art and will not be described in any greater detail herein.
In this embodiment, the main function of the incineration system 101 is to incinerate the tail gas or flue gas and byproducts from the incinerator flue gas inlet line 301, and to convert the pollutants in the flue gas line 300 into simple H through complete combustion2O、CO2Etc. and release a large amount of combustion heat, wherein:
the tail gas, the flue gas and the raw gas sent by the valve group system 100 are received through the incinerator flue gas inlet pipeline 301 to prepare ethylene glycol by-products and are combusted.
In addition, the incineration system 100 also receives fuel gas, such as raw coke oven gas, from the fuel supply system 108 through the incinerator fuel gas supply line 316, but mainly used as ignition, pilot burner, and the fuel gas consumption is small.
In this embodiment, a safety valve, a pressure gauge, a thermometer, a flowmeter, etc. are disposed on the drum of the exhaust-heat boiler system 102. The waste heat boiler system 102 is mainly used for generating steam as a byproduct. The heat of the waste heat boiler comes from the flue gas introduced from the rear of the incineration system 101 through the waste heat boiler flue gas inlet pipeline 302, and preferably, the temperature of the flue gas introduced from the waste heat boiler flue gas inlet pipeline 302 is about 900 ℃. Raw material water enters the economizer system 105 through an economizer water inlet pipeline 309 to be heated, then enters the waste heat boiler system 102 through a waste heat boiler water inlet pipeline 310, and after the high-temperature flue gas effect, the produced steam has the parameter of 1.2MPa saturated steam, and the produced steam is discharged through a waste heat boiler steam pipeline 311.
Further, the rear of the waste heat boiler system 102 is connected with the air preheating system 103 through an air preheating flue gas inlet pipeline 303. After the heat of the high-temperature flue gas is removed by the waste heat boiler system 102, the temperature of the flue gas in the flue gas inlet pipeline 303 of the air preheater is reduced to about 400 ℃.
In this embodiment, the air preheater system 103 mainly functions to receive the flue gas discharged from the exhaust heat boiler system 102 through the air preheater flue gas inlet line 303, and absorb the heat thereof to heat the combustion air. The flue gas then enters the PSA tail gas preheating system 104 via the PSA tail gas preheating flue gas inlet line 304.
Further, combustion air enters the air preheater system 103 through the air preheater inlet pipeline 312 for heat exchange and then is sent to the incineration system 101 through the air preheater outlet pipeline 313 for mixing with tail gas and byproducts for combustion so as to reduce the consumption of fuel gas, and no fuel gas is required to be additionally supplied to the incineration system 101. Compared with the prior art which needs to supply fuel gas into the incineration system 101 all the time to meet the combustion condition, the energy consumption is greatly saved.
The selected temperatures of the air in the air preheater inlet line 312 and the air preheater outlet line 313 in this example were 30 c and 310 c, respectively. The flue gas temperature at the outlet of the air preheater system 103 into the PSA tail gas preheat flue gas inlet line 304 is 310 ℃.
In this embodiment, a PSA preheater inlet line 314 and a PSA preheater outlet line 315 are connected to the PSA tail gas preheater system 104, and PSA gas enters the PSA tail gas preheater system 104 through the PSA preheater inlet line 314 and exits the PSA preheater outlet line 315. The primary function of the PSA tail gas preheating system 104 is to receive flue gas exiting the air preheater system 103 via PSA preheater flue gas inlet line 304 and absorb its heat to heat the PSA gas for desorption regeneration. Wherein:
the preferred temperatures of the flue gas in the flue gas inlet pipeline 304 and the flue gas in the economizer flue gas inlet pipeline 305 of the PSA preheater are 310 ℃ and 250 ℃ respectively;
the preferred temperatures of the PSA gas in PSA preheater inlet line 314, PSA preheater outlet line 315 are 40 deg.c, 200 deg.c, respectively.
In this embodiment, the economizer system 105 is connected to an economizer water inlet line 309 and a waste heat boiler water inlet line 310, and the waste heat boiler water inlet line is connected to the waste heat boiler system 102. The main function of the system is to further utilize the flue gas waste heat, the economizer system 105 receives the flue gas or the tail gas exhausted by the PSA tail gas preheater system 104 through an economizer flue gas inlet pipeline 305, absorbs the heat of the flue gas or the tail gas to supplement water and heat the waste heat boiler system 102, and further reduces the energy consumption of the system. Wherein:
the optimal temperatures of the flue gas in the economizer flue gas inlet pipeline 305 and the induced draft fan inlet pipeline 306 are 250 ℃ and 150 ℃ respectively;
the preferred temperatures of the water in the economizer feed line 309 and the waste heat boiler feed line 310 are 104 ℃ and 170 ℃ respectively.
In this embodiment, the main process flow of the flue gas waste heat cascade utilization system is as follows: the flue gas reaches the valve group system 100 through a flue gas pipeline 300, reaches the flue gas incineration system 101 after being stabilized in pressure and stabilized in flow, reaches the waste heat boiler system 102 through a waste heat boiler flue gas inlet pipeline 302, reaches the air preheater system 103 through an air preheater flue gas inlet pipeline 303 after steam is produced, heats combustion air of the flue gas incineration system 101, reaches the PSA tail gas preheater system 104 through a PSA preheater flue gas inlet pipeline 304, heats PSA gas, reaches the economizer system 105 through an economizer flue gas inlet pipeline 305, preheats the waste heat boiler system 102, enters water, reaches the fan system 106 through a draught fan inlet pipeline 306, is boosted through the fan system 106, reaches the chimney system 107 through a chimney inlet pipeline 307, and finally exhausts the flue gas reaching the standard through a chimney outlet pipeline 308.
Referring to fig. 3, as a variation of this embodiment, the air preheater system 103, the PSA tail gas preheater system 104, and the economizer system 105 are connected together in a manner that two devices are operated in parallel, and the positions of the air preheater system 103, the PSA tail gas preheater system 104, and the economizer system 105 on the parallel lines are in the same order.
Comparing fig. 1 and fig. 3, it can be easily found that the series-parallel connection of the system process is more scientific and reasonable than the prior art process, and has the following characteristics: the cascade recycling of the flue gas waste heat can be realized, and the energy-saving benefit is more obvious; the use of two sets of air preheater systems 103, PSA tail gas preheater systems 104 and economizer systems 105 allows for a reduction in the individual heat exchanger loads. The heat exchange area of single equipment is small, the bearing requirement and the occupied area are small, the manufacturing and the transportation are convenient, and the investment is lower; the equipment on each branch is the same, and the sequence is consistent, so that the phenomenon of flue gas bias flow can be effectively avoided; and the phenomenon of carbon precipitation of the flue gas is avoided.
Finally, it is to be noted that: in the above embodiments, the invention is not limited to the above embodiments in a reasonable manner, and persons skilled in the art to which the invention pertains will understand that all equivalent modifications and changes can be made without departing from the technical spirit of the invention and the scope of the invention is protected by the patent.

Claims (9)

1. The flue gas waste heat gradient utilization system applicable to raw gas recycling is characterized by comprising a valve bank system (100), an incineration system (101), a waste heat boiler system (102), an air preheater system (103), a PSA tail gas preheater system (104), an economizer system (105), an induced draft fan system (106) and a chimney system (107);
pollutants to be treated enter a valve bank system (100) through a flue gas pipeline (300), a pressure and flow stabilizing and stabilizing device is arranged in the valve bank system (100), the pollutants after pressure and flow stabilization enter an incineration system (101) through an incinerator flue gas inlet pipeline (301), and then the flue gas sequentially passes through a waste heat boiler system (102), an air preheater system (103), a PSA tail gas preheater system (104) and an economizer system (105), and is finally discharged through an induced draft fan system (106) and a chimney system (107).
2. The stepped flue gas waste heat utilization system applicable to raw coke oven gas recycling as claimed in claim 1, wherein the valve bank system (100) comprises one or more of a waste gas valve bank, a waste liquid valve bank and a fuel gas valve bank.
3. The stepped utilization system of waste heat of flue gas applicable to raw coke oven gas recycling as claimed in claim 2, wherein a delivery line of each type of valve bank in the valve bank system (100) is provided with a shut-off valve, a filter, a pressure reducing valve, a buffer tank, a filter, a temperature and pressure monitoring and an emergency shut-off valve.
4. The flue gas waste heat gradient utilization system applicable to raw gas resource recovery as claimed in claim 1, wherein an economizer water inlet pipeline (309) and a waste heat boiler water inlet pipeline (310) are connected to the economizer system (105), and the waste heat boiler water inlet pipeline (310) is connected to the waste heat boiler system (102).
5. The flue gas waste heat cascade utilization system applicable to raw gas recycling of claim 1, wherein an air preheater inlet pipeline (312) and an air preheater outlet pipeline (313) are connected to the air preheater system (103), the air preheater outlet pipeline (313) is connected to the incineration system (101), and combustion air enters the air preheater system (103) from the air preheater inlet pipeline (312) for heat exchange and then is sent to the incineration system (101) through the air preheater outlet pipeline (313).
6. The cascade utilization system of flue gas waste heat capable of being applied to raw gas recycling according to claim 1, wherein a PSA preheater inlet line (314) and a PSA preheater outlet line (315) are connected to the PSA tail gas preheater system (104), and PSA gas enters the PSA tail gas preheater system (104) from the PSA preheater inlet line (314) and is discharged from the PSA preheater outlet line (315).
7. The flue gas waste heat gradient utilization system applicable to raw coke oven gas recycling according to any one of claims 4 to 6, wherein one or more of the air preheater system (103), the PSA tail gas preheater system (104) and the economizer system (105) are arranged in parallel.
8. The flue gas waste heat gradient utilization system applicable to raw coke oven gas recycling according to claim 7, wherein the air preheater system (103), the PSA tail gas preheater system (104) and the economizer system (105) are arranged in the same order on each parallel line.
9. The flue gas waste heat gradient utilization system applicable to raw coke oven gas resource recovery as claimed in claim 1, further comprising a fuel supply system (108), wherein the fuel supply system (108) supplies fuel gas to the incineration system (101) through a fuel gas supply line (316).
CN202010524327.4A 2020-06-10 2020-06-10 Flue gas waste heat cascade utilization system capable of being applied to raw coke oven gas recycling Pending CN111720838A (en)

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Publication number Priority date Publication date Assignee Title
CN103353121A (en) * 2013-07-24 2013-10-16 江苏海事职业技术学院 Smoke waste heat deep recycling system for dead-burn blast furnace gas boiler
CN203440084U (en) * 2013-09-04 2014-02-19 神华集团有限责任公司 Smokeless coal graphitizing system
CN203848699U (en) * 2014-05-13 2014-09-24 神华集团有限责任公司 Waste heat utilization device for Slapple activating oven tail gas
CN204678315U (en) * 2015-04-28 2015-09-30 江苏金源腾峰换热设备有限公司 A kind of blast furnace gas burning waste-heat recovery device
CN106969638A (en) * 2017-04-01 2017-07-21 江苏省冶金设计院有限公司 Rotary hearth furnace fume afterheat gradient utilization system and application method
CN108916894A (en) * 2018-07-17 2018-11-30 郑州外思创造力文化传播有限公司 A kind for the treatment of process and device of the organic exhaust gas containing VOCs
CN210107426U (en) * 2019-04-30 2020-02-21 洛阳超蓝节能技术有限公司 Sulfur-containing tail gas incineration device

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Application publication date: 20200929