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WO2009070941A1 - Système intégré de génération de gaz combustible de biomasse - Google Patents

Système intégré de génération de gaz combustible de biomasse Download PDF

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Publication number
WO2009070941A1
WO2009070941A1 PCT/CN2007/071193 CN2007071193W WO2009070941A1 WO 2009070941 A1 WO2009070941 A1 WO 2009070941A1 CN 2007071193 W CN2007071193 W CN 2007071193W WO 2009070941 A1 WO2009070941 A1 WO 2009070941A1
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WO
WIPO (PCT)
Prior art keywords
gas
biomass
water
ash
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/071193
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English (en)
Chinese (zh)
Inventor
Ronnie Lo
Anthony Yin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGXI PEAKO BIOMASS ENERGY CO Ltd
Original Assignee
JIANGXI PEAKO BIOMASS ENERGY CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGXI PEAKO BIOMASS ENERGY CO Ltd filed Critical JIANGXI PEAKO BIOMASS ENERGY CO Ltd
Priority to CN2007801014264A priority Critical patent/CN102105568A/zh
Priority to PCT/CN2007/071193 priority patent/WO2009070941A1/fr
Publication of WO2009070941A1 publication Critical patent/WO2009070941A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • 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
    • C10J3/463—Gasification of granular or pulverulent flues in suspension in stationary fluidised beds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • 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
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/15—Details of feeding means
    • C10J2200/158—Screws
    • 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
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0916—Biomass
    • 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
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

Definitions

  • the present invention relates to a system for converting biomass to gas. Background technique
  • Biomass energy like solar energy, wind energy, tidal energy, and geothermal energy, has little impact on the environment during production and use. At the same time, it is an inexhaustible renewable energy source, so it is increasingly valued by humans. However, humans really use biomass energy for a short period of time and lack of experience. There are cognitive misunderstandings about the use of biomass energy. For example, some people think that the larger the investment in biomass energy projects, the better the economic benefits, and the neglect of the characteristics of biomass resources. In fact, the development of distributed medium and small biomass energy projects is far more reasonable than the centralized development of large-scale projects. On the other hand, some of the early construction of biomass energy projects were not well thought out due to design considerations, imperfect processes, shortage of biomass raw materials during operation, unstable system operation, high operational intensity, secondary pollution, etc., which affected Many people invest in the confidence of biomass energy projects.
  • biomass energy utilization project provides enterprises with the energy needed for production development while rationally disposing of waste biomass materials. How to gasify agricultural and forest waste biomass for gas re-industrialization has always been a problem that people are looking forward to. There have been various attempts before:
  • An invention patent application with the application number 200610017108. 7 discloses a two-stage biomass gasification furnace.
  • the basic principles and models of this gasifier have appeared almost 100 years ago. They were widely used during the Second World War.
  • the use of gasifiers to convert biomass into gas during biomass utilization is only The most basic first step, and the customer's most concern is how to treat biomass gas to meet industrial standards, and how to deal with environmental issues related to sewage, wet ash, and odor generated during gas processing.
  • this patent only briefly discusses the principle of the gasifier, simply mentions the calorific value and output of the gas, but lacks the theoretical basis. How to use the biomass gas after it is generated from the gasifier, whether it needs to be cooled, cleaned, de-focused They are all owed.
  • the patent number is 200510043836.
  • the invention name is a low tar biomass gasification method and apparatus, which clarifies that the two processes of thermal cracking and gasification are separately performed, thereby reducing the tar content of the biomass gas.
  • the patent literature does not specify the specific data of the tar content of the "low" tar biomass gas. The method of cooling and cleaning the gas is not described, but only the gas cooler.
  • the invention separates the thermal cracking from the gasification process, and additionally increases the external heat source, oxidant and the like of the pyrolyzer, which undoubtedly compromises its economy and reliability.
  • the patent does not specify the scale of its use. If the output power should not exceed 50 kW according to the feed rate mentioned in the patent, the patent can be said to be a model in the experimental stage, and it is impossible to carry out industrial production and commercial operation. .
  • the raw materials used are not 100% biomass energy, and some coal powder needs to be added as raw materials;
  • the present invention provides a system for comprehensively solving a system problem arising from a biomass gas generation integration process, and providing a safe and environmentally friendly gas biomass gas generation integrated system.
  • the biomass gas generating integrated system of the present invention is characterized in that: the system is sequentially connected with a raw material feeding system, a gas generating system, a dust removing system, a cooling cleaning system, and an electrostatic discharge according to a gas generation and processing sequence.
  • the raw material feeding system comprises a small silo which is contracted into a conical mouth at a lower portion, and the bottom of the small silo is docked with the lower hopper through a switchable lower material inlet plate, and the bottom of the small hopper is connected with the feeding screw device, and the feeding screw device is connected. Connection to the gas generation system prevents tempering.
  • the gas generating system comprises a gas generating furnace, wherein a gas inlet furnace has a feeding port connected to the feeding screw device, a bottom portion connected to the blower through the air distribution plate, and a gas passage opening at the top.
  • the lower end of the gas generator is provided with a ash discharge port, and the ash discharge port is connected with the ash screw device.
  • the dust removal system includes a cyclone duster connected to the gas passage port, and the bottom of the cyclone dust collector is connected with the water cooling blower through the ash discharge pipe, and an air preheater is arranged outside the cyclone dust collector, and the air preheater and the cyclone dust collector form a heat for the air.
  • the air outlet at the bottom of the air preheater is connected to the air inlet of the blower described above.
  • the cooling cleaning system comprises two stages of spray cooling chambers arranged in sequence, the first stage spray cooling chamber is provided with a partition for increasing the gas circulation passage, the spray cooling indoor wall and the top are provided with a shower head, and the second stage is sprayed.
  • the inlet of the shower cooling chamber is provided with a wide and narrow turbulent cleaning chamber, and a sprinkler is arranged at the top of the turbulent cleaning chamber.
  • the drain pipe at the bottom of the two-stage spray cooling chamber is connected with the water sealing pool, and the water sealing pool is provided with The oil compartment is connected with the filter tank of the fender, and the other end of the filter tank is connected with a circulating pool.
  • the water in the circulating pool is processed by the heat exchanger and sent to the spray cooling chamber.
  • the water seal pool, the filter tank and the bottom of the circulating pool pass through.
  • the ash discharge valve is connected to the ash discharge screw.
  • a filtering device is arranged at the lower end of the ash outlet of the ash discharging screw device, and the filtered wet ash is sent to the drum dryer, and the dried ash enters the raw material feeding system, and the filtered water is sent to the circulating pool.
  • the electrostatic decoking system comprises a cylinder body, and a gas inlet connected to the cooling cleaning system is arranged at the bottom, a plurality of air distribution plates are arranged on the upper part of the gas inlet in the cylinder body, and a high-voltage electrostatic decoking device is arranged on the air distribution plate, the gas outlet And an explosion-proof safety door is disposed on an upper portion of the cylinder, wherein the high-voltage electrostatic decoking device comprises an insulating porcelain bottle fixed on the top of the cylinder body, and a plurality of vertically suspended electrode wires connected to the insulating porcelain bottle, each of the wire wires being fixed in the positioning. In the focus tube on the orifice plate.
  • the voltage stabilizing system is connected to the electrostatic decoking system through a Roots blower, and the voltage stabilizing system comprises a voltage stabilizing water tower and a safety water seal connected thereto, wherein the voltage regulating water tower comprises a gas inlet connected with the electrostatic decoking system, and the safe water a balanced passage for sealing connection, a gas outlet for supplying clean gas at the top, and a drain port provided at the bottom and connected with a drain valve, the safety water seal includes a tank body having a drain tube at the top, and one end of the tank body It is connected with the stabilized water tower, and the other end opening is downwardly arranged in the elbow in the tank body.
  • the horizontal plane of the tank body is higher than the lower end of the elbow, and the open end of the emptying tube is provided with an electronic ignition device.
  • the invention also includes a monitoring system comprising a temperature/pressure control device disposed in the gas generating system, the dust removing system, the cooling cleaning system, the electrostatic decoking system and the voltage stabilizing system, and the gas oxygen content in the electrostatic decoking system Control device, gas calorific value control set in the voltage regulator system.
  • a monitoring system comprising a temperature/pressure control device disposed in the gas generating system, the dust removing system, the cooling cleaning system, the electrostatic decoking system and the voltage stabilizing system, and the gas oxygen content in the electrostatic decoking system Control device, gas calorific value control set in the voltage regulator system.
  • the present invention provides a complete technical solution for the generation and processing of biomass gas. Compared with the prior patent technology, the description has the following characteristics:
  • the sewage treatment tank is placed overhead, and the wet ash is discharged through the bottom drain valve, which is easy to clean;
  • the sewage is completely recycled after being settled, filtered, and heat-exchanged, and there is no external discharge;
  • the wet ash is re-vaporized after being precipitated, filtered and dried, and is not disposed of;
  • Figure 1 is a general flow diagram of the system of the present invention.
  • Figure 2 is a structural diagram of a raw material feeding system, a gas generating system, and a dust removing system.
  • Figure 3 is a structural diagram of the cooling and cleaning system.
  • Figure 4 is a structural diagram of an electrostatic decoking system.
  • Figure 5 shows the structure of the voltage regulator system.
  • FIG. 6 Schematic diagram of the monitoring system.
  • the biomass material used in the system of the invention can be directly used for granular or powdery biomass with a size of ⁇ 20 mm, such as rice husk, peanut shell, wood chips, etc.; the bulk and strip biomass needs to be pulverized before use.
  • granular or powdery biomass with a size of ⁇ 20 mm, such as rice husk, peanut shell, wood chips, etc.
  • the bulk and strip biomass needs to be pulverized before use.
  • the raw material consumption and gas production of the present invention vary depending on the specific conditions of the biomass raw materials used.
  • the consumption of common biomass raw materials such as rice husk, straw or sawdust in a naturally air-dried state is 1. 5 ⁇ 2. 1 ton / hour, gas production > 3600 cubic meters (standard) / hour, gas calorific value range 500CT7500 kJ/m3 (standard), gas temperature ⁇ 60 degrees Celsius, gas pressure ⁇ 1 Rice water column, gas tar content ⁇ 20 mg / m3 (standard), the maximum power of the device ⁇ 100 kW, standard operating state power 50 ⁇ 80 kW.
  • the device of the invention is used in conjunction with a gas generator set to generate an electrical energy output of 1200 kWh.
  • the biomass gas generation integrated system is sequentially connected with a raw material feeding system 10, a gas generating system 20, a dust removing system 30, a cooling cleaning system 40, an electrostatic decoking system 50, and a steady state in the order of gas generation and processing.
  • Pressure system 60 The biomass gas generation and treatment process is: the biomass raw material enters into the gas generating system 20 through the raw material feeding system 10 and is vaporized into biomass gas by high temperature, and the gas is then removed by the dust removing system 30 and then enters the gas cooling cleaning system 40, and is sprayed.
  • the cooling and rinsing of the shower water achieves the purpose of cooling and cleaning the gas.
  • the cooled and cleaned gas enters the high-voltage electrostatic decoking system 50, and the tar particles in the gas are adsorbed and removed under the action of the high-voltage electromagnetic field to achieve the removal of the gas tar particles.
  • the high-frequency electrostatic decoking gas passes through the Roots blower and enters the stabilizing system 60, thereby providing clean and high-quality gas for production or power generation purposes.
  • the raw material feeding system is shown in the left part of Fig. 2.
  • the raw material feeding system 10 of the present invention is composed of a small silo 11, a lower hopper 12, and a feed spiral 13, and the raw material feeding system 10 ensures that the gas generating furnace maintains the sealed state in the furnace during feeding, and also prevents the furnace from being shut down. Tempering "causes a silo fire.
  • the small silo 11 is square, the bottom is conically constricted, the top is provided with a feed port 112, the bottom is square and the valve is provided with a discharge port 111, and the lower feed port 111 is connected to the lower hopper 12 through the switchable insert plate 113.
  • the lower hopper 12 is connected to the feed screw 13, and the feed screw 13 is connected to the gas generating system 20.
  • the biomass feedstock is conveyed to the small silo 11 and then to the lower hopper 12 via the discharge port 111 and finally to the gas generating system 20 by the feed screw 13.
  • the sealing action of the feed screw 13 ensures the sealed state in the furnace when the raw material enters the gas generator; after the furnace is stopped, the insert plate 113 of the lower feed port 112 is closed, and the lower hopper 12 and the feed screw 13 are emptied, and the lower
  • the hopper 12 is separated from the gas generating furnace, so that the small silo 11 does not catch fire, and at the same time, the sealing of the gas generating furnace is ensured, in order to avoid the danger of excessive pressure, small materials
  • a pressure relief pipe 114 is provided at the top of the tank 11.
  • the small silo 11 has an effective volume of about 15 cubic meters, and can store about 3 tons of biomass raw material
  • the feeding system has a conveying capacity of 0. 5 to 3 tons per hour, and is equipped with a speed regulating motor to adjust the feeding speed. .
  • the gas generation system is shown in the middle section of Figure 2.
  • the gas generating system 20 includes a fluidized bed gas generating furnace 21, which is a cylindrical hollow furnace body, and the bottom is an inverted round table with a large upper and a lower.
  • the furnace is made up of inner and outer parts: heavy refractory brick, light refractory brick, thermal insulation pouring material and outer wall of the barrel; the top of the furnace is composed of thermal insulation pouring material and top cover.
  • the bottom air inlet 22 of the fluidized bed gas generator 21 has a wind deflecting plate 23, and is connected to the air blower 24 through the air distributing plate 23, and the air is evenly distributed through the air distributing plate 23, and is injected into the gas generating furnace 21 at a high speed;
  • the feed port 25 is connected to the feed screw 13 at a lower portion of the middle portion of the generator 21, and the biomass feedstock enters the gas generator 21 through the feed port 25.
  • the biomass material In the fluidized state, the biomass material is burned in the high temperature furnace with oxygen in the air, and the biomass reacts with the oxygen in the air to generate carbon dioxide, and at the same time releases heat; on the other hand, due to the limited oxygen in the furnace, the biomass The carbon in the middle part which cannot be in contact with oxygen is reduced by carbon dioxide to form carbon monoxide, and the reduction reaction absorbs heat.
  • the biomass feedstock and air are continuously oxidized (exothermic) in the gas generator to restore the chemical reaction equilibrium and heat balance in the furnace, and the biomass feedstock is reacted with air to form biomass gas.
  • the oxidation-reduction reaction of biomass and oxygen is only one of the complex chemical reactions in the gas generator.
  • the biomass feedstock contains water and the air also contains a small amount of water vapor
  • the actual conditions in the gas generator are complicated. Much, the water becomes water vapor in the high temperature furnace and participates in the oxidation-reduction reaction between carbon and oxygen, and generates other combustible gases such as hydrogen, methyl hydrazine, and unsaturated hydrocarbons (CnHm). Therefore, in addition to carbon monoxide, the gas in the gasification furnace has hydrogen, formamidine, and unsaturated hydrocarbons.
  • the percentage of biomass gas components varies depending on the type of raw material and the amount of water content.
  • Table 1 shows the standard composition and calorific value of rice husk gas:
  • Biomass feedstock is gasified into gas in a high temperature gas generator, and biomass feedstock becomes biomass ash.
  • the biomass ash is out of balance from the original fluidized state due to the lighter mass, and enters the dust removal system 30 with the jet stream upstream along the gas outlet 26 at the top side of the furnace.
  • the biomass feedstock enters the gas generator 21
  • some of the larger particulate biomass feedstock or ash does not enter the dust removal system 30 with the gas, but sinks to the bottom of the gas generator 21 and enters the row through the bottom ash tube 27.
  • the lower ash pipe 27 is connected to the ash discharge system 29 through the ash screw 28 to ensure the sealing state of the gas generator.
  • the dust removal system is shown in the right part of Figure 2.
  • the dust removal system 30 is composed of a two-stage cyclone dust collector 31.
  • the first stage cyclone dust collector mainly removes the large mass and particle size ash entrained in the gas, and the second stage cyclone dust removal.
  • the main purpose is to remove the ash from the gas with a smaller particle size and lighter weight.
  • After the cyclone dust removal system 30, about 95% of the ash carried by the gas is separated from the gas and connected to the ash discharge system 29 through the water-cooling air blower 32 at the bottom, so that the gas system in the cyclone 31 can be sealed.
  • An air preheater 33 is further disposed outside the cyclone 31.
  • the air preheater 33 and the cyclone 31 form a cavity 34 for heat exchange between the air, an air outlet 35 at the bottom of the air preheater 33, and the air blower described above. 24 air inlet connection.
  • the outside air enters from the top and exchanges heat with the high temperature gas in the air preheater 33, and the preheated air is sent to the gas generator 21 through the bottom blower, thereby improving the use efficiency of the heat energy.
  • the first stage spray cooling chamber 41 functions mainly for cooling, and a partition 41 1 for increasing the gas flow passage is provided therein, and a pressure water tank and a nozzle 43 are arranged on the top and the side of the cooling chamber side, and the gas is supplied by a large amount of spray water.
  • the second stage spray cooling chamber 42 is mainly used for cleaning and water separation, and the second stage spray cooling chamber 42 includes two parts of a turbulent cleaning chamber 421 and a water dividing tank 422.
  • the turbulent cleaning chamber 421 is provided with an upper width and a lower narrow structure, and is disposed at a connection with the first shower cooling chamber 41, because the high pressure spray water at the top thereof is intense in the pipeline.
  • the water dividing tank 422 is a tank having a relatively large cross-sectional area, and the flow rate of the gas in the tank is lowered, and as the temperature is lowered, part of the water vapor in the gas condenses into a larger water droplet and Separated from the gas.
  • the bottom of the two-stage spray cooling chamber has a cone shape and is connected to the water sealing tank 44 through a drain pipe. The drain pipe discharges the spray water in the gas processing tank, and the gas seal ensures the gas by the water seal. The sealing of the processing box.
  • the spray water consumption of the whole gas cooling and cleaning process is 80 cubic meters per hour, and the temperature difference of the spray water before and after the gas cooling cleaning is about 10 ° C.
  • the gas temperature is ⁇ 60 ° C. Most of the ash and impurities are cleaned except for a very small amount of tar particles that are difficult to remove by physical methods.
  • the drain pipe at the bottom of the two-stage spray cooling chamber is connected to the water seal pool, and the water seal tank 44 is connected to the filter water tank 45 provided with the grease trap 451 and the fender 452, and the other end of the filter tank 45 is connected with the circulating water tank 46, and the circulation
  • the water in the pool 46 is processed by the heat exchanger 47 and the cooling tower 471 and sent to the spray cooling chamber for recycling.
  • the water sealing tank 44, the filtering water tank 45, and the bottom of the circulating water tank 46 are connected to the ash discharging screw device 49 through the ash discharging valve 48. The ash is discharged through the drain valve and then enters the filtering device 70 through the sewage spiral.
  • the cleaned water filtered in the filtering device 70 is collected into the circulating water tank 71 and pumped back to the circulating water tank 46 for recycling.
  • the dry ash remaining in the filtering device 70 is sent to the drum dryer 72 to be dried to a water content of ⁇ 25%, and then sent back to the raw material feeding system 10 and mixed with the biomass raw material to participate in the gasification reaction of the biomass raw material. .
  • the electrostatic decoking system 50 is a cylindrical cylinder having the following structure:
  • the cylindrical cylinder has a diameter of about 2. 2 meters and a height of about 8 meters.
  • the bottom is provided with a gas inlet 51, a manhole 51 1 and a sewage outlet 512.
  • the top is provided with an explosion-proof safety door 513, a gas outlet 514 and an inspection hole 515, and an inspection ventilation valve 516 in the middle.
  • the focus tube 52 has a diameter of 273 mm, a total of 27 pieces, and the upper portion is uniformly distributed inside the barrel through the positioning hole plate 521, and a wire electrode 53 having a diameter of about 4 mm is disposed at the center of each of the focus tubes.
  • the wire electrode 53 is suspended by a lifting eye 531, an adjustable hook 532, an insulating suspended porcelain bottle 533, and a pendant 536.
  • Insulated through-wall electric porcelain bottle 533' and insulated suspension porcelain bottle 533 ensure that the high-voltage power supply will not be transmitted to the gas high-voltage electrostatic decoking device cylinder.
  • Bottles 533, 533' are cleaned to prevent tar from adhering.
  • the principle of decoking of biomass gas in high-voltage electrostatic decoking system is as follows: High-voltage power supply through insulation through-wall porcelain bottle 533 'The high-voltage electric conduction is guided to the electrode wire 53, and a high-voltage magnetic field is formed between the electrode wire 53 and the trapping tube 52. When the gas enters from the gas inlet 51 at the bottom of the device, the gas is evenly distributed into the trap 32 through the air distribution plate 54. The gas obtains sufficient energy under the action of the electromagnetic field to become free electrons and conduct electricity, and the tar particles in the gas are adsorbed by the charged particles.
  • the tar falls on the bottom of the device by its own weight and is discharged through the drain port 512. After passing through the electromagnetic field of the trap tube, the gas is output from the gas outlet 514 at the top of the device.
  • the high-voltage electrostatic decoking system of the device of the invention completely removes the tar particles in the gas by a high-voltage electromagnetic field of 35,000 volts or more, and the treated gas tar content is less than 20 mg/m3 (standard), which satisfies most of the current gas generator sets. Requirements for gas tar content.
  • the voltage stabilizing system 60 is connected to the electrostatic decoking system 50 through the Roots blower 63.
  • the Roots blower 63 is the power source of the entire gas system, and the gas system before the gas inlet of the Roots blower is in a negative pressure state.
  • the regulator system 60 includes a regulated water dividing tower 61 and a safety water seal 62 connected thereto, and the regulated water dividing tower 61 serves to adjust the pressure of the gas system and the cyclone water separation.
  • the pressure regulating water tower is a cylindrical shape having a diameter of 2.1 meters.
  • the tank has a volume of about 12 cubic meters and a drain valve 611 at the bottom.
  • the regulating water dividing tower 61 is connected to the safety water seal 62.
  • the safety water seal 62 is provided with an elbow 621 whose one end is connected to the pressure regulating water tower 61 and whose other end is downwardly disposed in the tank body, and the tank horizontal plane is higher than the elbow
  • the top of the safety water seal 62 is provided with an emptying pipe 622, and the top of the emptying pipe has a windproof casing 623, and the windproof casing is provided with an electronic ignition device, and the gas is ignited and then emptied when necessary.
  • the safety water seal 62 is equipped with water level control valves 624 of different heights, and the pressure of the gas can be adjusted by the water level control valve 624. When the gas pressure is too high, the gas will break away from the water seal.
  • the gas outlet in the regulated water dividing tower 61 is provided with a valve. When the calorific value of the system gas is stabilized, the valve can be opened to directly supply the gas to the gas generating unit 90 to generate electric energy.
  • the monitoring system 80 of the present invention is controlled by temperature/pressure, gas oxygen content. Control, gas calorific value control, switch control, speed control motor speed control and other components.
  • Temperature/pressure control The gas generating system 20, the dust removing system 30, the cooling cleaning system 40, the static decoking system 50 and the voltage stabilizing system 60 are provided with a plurality of monitoring points, respectively, and temperature/pressure probes are installed, and the collected data is summarized to Temperature and pressure inspection instrument 82, and then transmitted to the on-site monitoring computer 85; gas oxygen content control: The electrostatic decoking system is equipped with an oxygen content probe, when the oxygen content in the gas is higher than
  • the Oxygen Content Monitor 83 immediately disconnects the high voltage power supply and activates an alarm.
  • the oxygen content monitor transmits the oxygen content analysis result to the on-site monitoring computer through RS232 in real time;
  • Gas calorific value control The voltage stabilization system 60 is equipped with an infrared gas sensor, which can be used for C0, H2, CH4, CnHm, etc. in the gas. Analyze and calculate the calorific value of the gas.
  • the online calorific value monitoring device 84 controls the feed screw speed and the hearth blower air volume by the gas calorific value result.
  • the gas calorific value data is transmitted to the on-site monitoring computer 85 in real time for analysis and preservation.
  • the on-site monitoring computer 85 can monitor all operational data on the field monitoring computer through the Internet by installing the client remote monitoring software.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention porte sur un système intégré de génération de gaz combustible de biomasse, qui comprend un système d'alimentation en matière première (10), un système de génération de gaz combustible (20), un système de dépoussiérage (30), un système de refroidissement et de lavage (40), un système statique d'élimination de goudron (50) et un système de stabilisation de la pression (60), tous étant reliés de façon successive conformément à un ordre de génération et de traitement de gaz combustible. Les déchets de l'agriculture et de la foresterie, comprenant les tiges, la balle de riz et les copeaux de bois, sont transformés en gaz combustible de biomasse de valeur calorique faible ou moyenne par la technologie de la gazéification à lit fluidisé et le gaz combustible obtenu est dépoussiéré, refroidi, lavé et débarrassé de son goudron de façon successive, et un gaz combustible de biomasse propre est obtenu. L'échelle du système est décidée selon les caractéristiques des matières de la biomasse. L'énergie de la biomasse est utilisée de façon raisonnable et aucune pollution secondaire de l'environnement n'est produite.
PCT/CN2007/071193 2007-12-06 2007-12-06 Système intégré de génération de gaz combustible de biomasse Ceased WO2009070941A1 (fr)

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CN2007801014264A CN102105568A (zh) 2007-12-06 2007-12-06 生物质燃气发生集成系统
PCT/CN2007/071193 WO2009070941A1 (fr) 2007-12-06 2007-12-06 Système intégré de génération de gaz combustible de biomasse

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