CN113278450A - Device and process for treating organic wastewater and domestic sludge by using coal water slurry gasification in cooperation - Google Patents
Device and process for treating organic wastewater and domestic sludge by using coal water slurry gasification in cooperation Download PDFInfo
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- CN113278450A CN113278450A CN202110561486.6A CN202110561486A CN113278450A CN 113278450 A CN113278450 A CN 113278450A CN 202110561486 A CN202110561486 A CN 202110561486A CN 113278450 A CN113278450 A CN 113278450A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
- C10J2300/1675—Integration of gasification processes with another plant or parts within the plant with the production of electricity making use of a steam turbine
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- 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
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a device and a process for treating organic wastewater and domestic sludge by using water-coal slurry gasification in coordination, which comprises a slurry preparation system, wherein the slurry preparation system is fixedly connected with a water-coal slurry pipeline, the other end of the water-coal slurry pipeline is fixedly provided with a gasification system, one end of the gasification system is fixed with two high-temperature gas pipelines, the surface of each high-temperature gas pipeline is fixedly provided with a gas waste heat recovery system, the other end of each high-temperature gas pipeline is fixedly provided with a gas pipeline, the other end of each gas pipeline is fixedly provided with a gas purification system, the other end of each gas purification system is fixedly provided with an internal combustion engine power generation system through a gas conveying pipeline, the other end of each internal combustion engine power generation system is provided with a high-temperature flue gas pipeline, the other end of each high-temperature flue gas pipeline is fixedly provided with a flue gas waste heat recovery system, the sludge treatment is ensured, and the resource utilization rate is improved, meanwhile, the production and living requirements are guaranteed, the efficiency is high, the stability is high, and the popularization and the use are facilitated.
Description
Technical Field
The invention relates to the field of wastewater and sludge treatment, in particular to a device and a process for treating organic wastewater and domestic sludge by using coal water slurry gasification.
Background
With the continuous improvement of the urbanization level in China, the sludge treatment situation is very severe, and the sewage treatment process is not simple to transfer pollutants into sludge. So-called sludge, which is actually a combination of various microorganisms and inorganic substances, in a sewage treatment process, most of organic pollutants are converted into cell components such as proteins of themselves and substances such as CO2, nitrogen and the like through degradation and conversion of microorganisms. There are also many substances which are adsorbed only to the zoogloea composed of microorganisms.
In order to relieve the contradiction between the sludge yield and the lag of the sludge treatment capacity, China has made a series of policies and plans in recent years, but leachate generated in a sanitary landfill mode is severely polluted liquid, if a landfill site is improperly selected or operated, underground water environment is polluted, gas generated in the landfill site is mainly methane, if appropriate measures are not taken, explosion and combustion can be caused, an incineration mode is large in treatment facility investment, high in treatment cost and high in equipment maintenance cost, sludge drying is achieved at the cost of sacrificing a large amount of heat energy or mechanical energy, the method is a simple environment-friendly measure, and sludge is not recycled.
Therefore, a new method and a new process are needed to be provided, and various pollutants are combined to be treated together, so that the existing treatment mode is improved.
Disclosure of Invention
The invention aims to provide a device and a process for treating organic wastewater and domestic sludge by using coal-water slurry gasification in coordination, wherein tar residue treatment and domestic sludge treatment are combined by a coal-water slurry gasification technology to prepare coal gas rich in CO and H2, part of the coal gas is used for preparing high-purity hydrogen through conversion and pressure swing adsorption, the high-purity hydrogen is used for hydrocracking of medium-low temperature coal tar separated from tar residues to produce vehicle engine fuel oil and chemicals with high added values, and the rest of the coal gas is used for cogeneration, so that clean resource comprehensive utilization of the tar residue treatment and the domestic sludge treatment is realized, the resource utilization rate is improved while the sludge treatment is ensured, the production and living requirements are ensured, and the device and the process are efficient and stable and are beneficial to popularization and use.
In order to solve the above problems, the present invention adopts the following technical solutions.
The device comprises a pulping system, wherein the pulping system is fixedly connected with a coal water slurry pipeline, the other end of the coal water slurry pipeline is fixedly provided with a gasification system, one end of the gasification system is fixed with a high-temperature gas pipeline, the surface of the high-temperature gas pipeline is fixedly provided with a gas waste heat recovery system, the other end of the high-temperature gas pipeline is fixedly provided with a gas pipeline, the other end of the gas pipeline is fixedly provided with a gas purification system, the other end of the gas purification system is fixedly provided with an internal combustion engine power generation system through a gas conveying pipeline, the other end of the internal combustion engine power generation system is provided with a high-temperature flue gas pipeline, the other end of the high-temperature flue gas pipeline is fixedly provided with a flue gas waste heat recovery system, and the other end of the flue gas waste heat recovery system is fixedly provided with a steam turbine power generation system through a first medium-temperature and medium pressure steam pipeline, and the other end of the steam turbine power generation system is provided with a steam turbine exhaust pipeline, and the other end of the steam turbine exhaust pipeline is fixedly provided with a recycling system.
Further, the one end fixedly connected with second middle temperature middling pressure steam conduit of gas waste heat recovery system, the other end fixed mounting in steam turbine power generation system of second middle temperature middling pressure steam conduit connects steam turbine power generation system through second middle temperature heavy pressure steam conduit, can preheat recovery system's heat with the gas and carry out recycle, carries out secondary power generation, improves recovery efficiency, guarantees stability in use.
Further, the other end fixedly connected with mud pipeline of slurrying system, the other end fixed mounting of mud pipeline has mud to add medicine modulation to supply and join in marriage the system, supplies to join in marriage the system through mud pipeline connection mud adds medicine modulation, can allocate the back to mud and carry, does benefit to unified management, effectively improves sludge treatment and utilization efficiency.
Further, slurrying system's other end fixedly connected with coal dust pipeline, the other end fixedly connected with raw materials coal system of coal dust pipeline through coal dust piping erection raw materials coal system, can support the powder with the raw coal, does benefit to the transport, and convenient follow-up conversion does not guarantee utilization ratio and work efficiency.
Further, the parallelly connected oxygen pipeline of installing of one end of gasification system, the other end fixed mounting of oxygen pipeline has the empty system oxygen system that makes of dividing, divides the system oxygen system that makes of dividing through the oxygen pipeline installation, can high-efficient stable oxygen suppliment, guarantees gasification efficiency, improves the stability in use.
Further, the recycling system comprises industrial production utilization and resident heating utilization, and the condensed water generated after secondary power generation can be recycled by connecting the recycling system, so that the use efficiency can be effectively improved, the cost is reduced, and the production and living demands are guaranteed.
Further, the first medium-temperature medium-pressure steam pipeline and the second medium-temperature medium-pressure steam pipeline are both connected in parallel to an air inlet port of the steam turbine power generation system.
Furthermore, the oxygen pipeline and the water-coal-slurry pipeline are connected in parallel and installed at the input end of the gasification system.
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the tar residue treatment and the domestic sludge treatment are combined through a coal water slurry gasification technology to prepare coal gas rich in CO and H2, part of the coal gas is used for preparing high-purity hydrogen through transformation and pressure swing adsorption, the high-purity hydrogen is used for hydrocracking of medium-low temperature coal tar separated from the tar residue to produce vehicle engine fuel oil and chemicals with high added values, and the rest coal gas is used for cogeneration, so that the clean resource comprehensive utilization of the tar residue treatment and the domestic sludge treatment is realized, the resource utilization rate is improved while the sludge treatment is ensured, the production and living requirements are ensured, the high efficiency and the stability are realized, and the popularization and the use are facilitated.
(2) Through medium temperature heavy pressure steam piping connection steam turbine power generation system of second, can preheat recovery system's heat with the gas and carry out recycle, carry out secondary power generation, improve recovery efficiency, guarantee stability in use.
(3) The sludge dosing and modulation supply and distribution system is connected through the sludge pipeline, sludge can be delivered after being subjected to allocation treatment, unified management is facilitated, and the sludge treatment and utilization efficiency is effectively improved.
(4) Through coal dust piping erection raw material coal system, can support the powder with the raw coal, do benefit to the transport, convenient follow-up conversion does not guarantee utilization ratio and work efficiency.
(5) Through the air separation oxygen generation system of oxygen pipeline installation, can high-efficient stable oxygen suppliment, guarantee gasification efficiency, improve stability in use.
(6) Through connecting recycle system, can utilize the condensate water behind the secondary power generation once more, can effectively improve the availability factor, reduce cost guarantees the production life demand.
Drawings
FIG. 1 is a block diagram of the process flow of the present invention.
The reference numbers in the figures illustrate:
1 pulping system, 11 water-coal-slurry pipeline, 12 gasification system, 13 high-temperature gas system, 14 gas waste heat recovery system, 15 gas pipeline, 16 gas purification system, 17 gas conveying pipeline, 18 internal combustion engine power generation system, 2 high-temperature gas pipeline, 21 gas waste heat recovery system, 22 first intermediate temperature medium pressure steam pipeline, 23 steam turbine power generation system, 24 steam turbine exhaust pipeline, 25 recycling system, 26 second intermediate temperature medium pressure steam pipeline, 27 sludge dosing and preparing system, 28 sludge pipeline, 3 coal dust pipeline, 31 raw material coal system, 32 oxygen pipeline, 33 air separation oxygen generation system.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Referring to fig. 1, a device and a process for treating organic wastewater and domestic sludge by using water coal slurry gasification in coordination comprise a pulping system 1, coal blocks from a raw material coal system 31 firstly enter a pre-grinding buffer bin, the buffer bin is provided with necessary iron and impurity removing devices, then enter a ball mill and are ground by using a sludge additive from a sludge dosing and conditioning system 27, and are stabilized and treated by a slurry filtering device, the pulping system 1 is fixedly connected with a water coal slurry pipeline 11, the other end of the water coal slurry pipeline 11 is fixedly provided with a gasification system 12, the water coal slurry from the pulping system is crushed and atomized by a nozzle and sprayed into a gasification furnace under the action of high-speed oxygen airflow from an air separation oxygen generation system, and the oxygen and atomized water coal slurry are subjected to high-temperature radiation effect in a refractory brick in the furnace and rapidly undergo a series of complex physical processes such as preheating, moisture evaporation, dry distillation of coal, pyrolysis and combustion of volatile matters, and gasification of carbon, A chemical process, namely finally generating wet coal gas with carbon monoxide, hydrogen, carbon dioxide and water vapor as main components; slag flows downwards, leaves a reaction zone, enters a chilling chamber water bath at the bottom of a furnace, is quenched and solidified, is intercepted in water, falls into a slag tank and is discharged at regular time through a slag discharging system, one end of a gasification system 12 is fixed by a high-temperature gas pipeline 13, the surface of the high-temperature gas pipeline 13 is fixedly provided with a gas waste heat recovery system 14, the high-temperature gas from the gasification system enters a gas waste heat boiler for recovering heat and sequentially passes through a superheater, an evaporator and an economizer to generate medium-temperature pressure steam, the other end of the high-temperature gas pipeline 13 is fixedly provided with a gas pipeline 15, the other end of the gas pipeline 15 is fixedly provided with a gas purification system 16, the other end of the gas purification system 16 is fixedly provided with an internal combustion engine power generation system 18 through a gas conveying pipeline 17, the other end of the internal combustion engine power generation system 18 is provided with a high-temperature flue gas pipeline 2, and the other end of the high-temperature flue gas pipeline 2 is fixedly provided with a flue gas waste heat recovery system 21, the invention adopts a novel reciprocating internal combustion hydrogen-rich low-heat value fuel engine to perform combustion power generation, greatly improves the power generation efficiency, the other end of the flue gas waste heat recovery system 21 is fixedly provided with a steam turbine power generation system 23 through a first medium-temperature medium-pressure steam pipeline 22, the other end of the steam turbine power generation system 23 is provided with a steam turbine exhaust pipeline 24, the other end of the steam turbine exhaust pipeline 24 is fixedly provided with a recycling system 25, a steam waste heat boiler is arranged at a gas outlet of a gasification system and a flue gas outlet of a gas internal combustion engine generator unit, and the generated steam enters the steam turbine generator unit to generate power and simultaneously supply heat for industrial production or residents, thereby not only increasing the project economic benefit, but also reducing the unorganized heat dissipation and heat island effect of a plant area and improving the operation environment.
Referring to fig. 1, one end of a gas waste heat recovery system 14 is fixedly connected with a second medium-temperature medium-pressure steam pipeline 26, high-temperature flue gas from an internal combustion engine power generation system enters a flue gas waste heat boiler to recover heat, and then passes through a superheater, an evaporator and an economizer in sequence to produce medium-temperature medium-pressure steam, the other end of the second medium-temperature medium-pressure steam pipeline 26 is fixedly installed in a steam turbine power generation system 23, the other end of a pulping system 1 is fixedly connected with a sludge pipeline 28, the other end of the sludge pipeline 28 is fixedly installed with a sludge dosing modulation supply and distribution system 27, and sludge and organic wastewater with water content of about 80% from a sewage treatment plant are filtered to remove bulk impurities firstly; then according to the engineering scale, the pulping process requirement, the additive performance, the additive dosage, the environmental protection requirement and the use economy, adding biochemical agents for modulation, wherein the other end of the pulping system 1 is fixedly connected with a coal dust pipeline 3, the other end of the coal dust pipeline 3 is fixedly connected with a raw material coal system 31, the raw material coal is unloaded by adopting a mechanical coal unloading mode, a closed coal storage yard or warehouse is adopted for storage, the raw material coal is subjected to screening, crushing and other processes to obtain the raw materials required by the pulping system, one end of the gasification system 12 is connected with an oxygen pipeline 32 in parallel, the other end of the oxygen pipeline 32 is fixedly provided with an air separation oxygen generation system 33, high-purity oxygen is prepared by a pressure swing adsorption air separation device and is used as a gasification agent of a coal water slurry gasification device, when the calorific value of the raw material is higher, air gasification is adopted for gasification, so as to save the investment cost, when the calorific value of the raw material is lower, in order to improve the gasification efficiency and the calorific value of the produced fuel gas, a pure oxygen gasification process may be employed.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (8)
1. The device and the process for treating the organic wastewater and the domestic sludge by using the coal water slurry gasification in cooperation comprise a pulping system (1), and are characterized in that: the pulping system (1) is fixedly connected with a water-coal-slurry pipeline (11), the other end of the water-coal-slurry pipeline (11) is fixedly provided with a gasification system (12), one end of the gasification system (12) is fixed with two high-temperature gas pipelines (13), the surface of each high-temperature gas pipeline (13) is fixedly provided with a gas waste heat recovery system (14), the other end of each high-temperature gas pipeline (13) is fixedly provided with a gas pipeline (15), the other end of each gas pipeline (15) is fixedly provided with a gas purification system (16), the other end of each gas purification system (16) is fixedly provided with an internal combustion engine power generation system (18) through a gas conveying pipeline (17), the other end of each internal combustion engine power generation system (18) is provided with a high-temperature flue gas pipeline (2), and the other end of each high-temperature flue gas pipeline (2) is fixedly provided with a flue gas waste heat recovery system (21), the other end of the flue gas waste heat recovery system (21) is fixedly provided with a steam turbine power generation system (23) through a first medium-temperature medium-pressure steam pipeline (22), the other end of the steam turbine power generation system (23) is provided with a steam turbine exhaust pipeline (24), and the other end of the steam turbine exhaust pipeline (24) is fixedly provided with a recycling system (25).
2. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 1, wherein: one end of the fuel gas waste heat recovery system (14) is fixedly connected with a second medium-temperature medium-pressure steam pipeline (26), and the other end of the second medium-temperature medium-pressure steam pipeline (26) is fixedly installed on the steam turbine power generation system (23).
3. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 1, wherein: the other end of the pulping system (1) is fixedly connected with a sludge pipeline (28), and the other end of the sludge pipeline (28) is fixedly provided with a sludge dosing modulation supply and distribution system (27).
4. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 1, wherein: the other end of the pulping system (1) is fixedly connected with a coal dust pipeline (3), and the other end of the coal dust pipeline (3) is fixedly connected with a raw material coal system (31).
5. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 1, wherein: an oxygen pipeline (32) is installed at one end of the gasification system (12) in parallel, and an air separation oxygen generation system (33) is fixedly installed at the other end of the oxygen pipeline (32).
6. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 1, wherein: the recycling system (25) comprises industrial production utilization and resident heating utilization.
7. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 2, wherein: the first medium-temperature medium-pressure steam pipeline (22) and the second medium-temperature medium-pressure steam pipeline (26) are connected in parallel to an air inlet port of the steam turbine power generation system (23).
8. The device and the process for treating organic wastewater and domestic sludge by using coal water slurry gasification in coordination as claimed in claim 5, wherein: the oxygen pipeline (32) and the coal water slurry pipeline (11) are connected in parallel and installed at the input end of the gasification system (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110561486.6A CN113278450A (en) | 2021-05-22 | 2021-05-22 | Device and process for treating organic wastewater and domestic sludge by using coal water slurry gasification in cooperation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110561486.6A CN113278450A (en) | 2021-05-22 | 2021-05-22 | Device and process for treating organic wastewater and domestic sludge by using coal water slurry gasification in cooperation |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057787A (en) * | 2017-03-21 | 2017-08-18 | 浙江大学 | The method that coal conversion waste water cascade utilization prepares fuel slurry |
| CN108237136A (en) * | 2017-12-30 | 2018-07-03 | 山东恒力新能源工程有限公司 | Three-level counter-current extraction coal-tar residue device and its processing method |
| CN111876203A (en) * | 2020-08-04 | 2020-11-03 | 中国东方电气集团有限公司 | Oil-containing sludge and organic waste liquid synergistic pulping and gasification treatment method |
-
2021
- 2021-05-22 CN CN202110561486.6A patent/CN113278450A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057787A (en) * | 2017-03-21 | 2017-08-18 | 浙江大学 | The method that coal conversion waste water cascade utilization prepares fuel slurry |
| CN108237136A (en) * | 2017-12-30 | 2018-07-03 | 山东恒力新能源工程有限公司 | Three-level counter-current extraction coal-tar residue device and its processing method |
| CN111876203A (en) * | 2020-08-04 | 2020-11-03 | 中国东方电气集团有限公司 | Oil-containing sludge and organic waste liquid synergistic pulping and gasification treatment method |
Non-Patent Citations (2)
| Title |
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| 徐超等: "污泥在水煤浆气化中的应用研究", 《上海化工》 * |
| 苏福永等: "《能源工程管理与评估》", 30 June 2019 * |
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