CN111394136B - Transport bed coal water slurry pyrolytic reaction device - Google Patents
Transport bed coal water slurry pyrolytic reaction device Download PDFInfo
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- CN111394136B CN111394136B CN202010320505.1A CN202010320505A CN111394136B CN 111394136 B CN111394136 B CN 111394136B CN 202010320505 A CN202010320505 A CN 202010320505A CN 111394136 B CN111394136 B CN 111394136B
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- 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
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Abstract
The utility model provides a transport bed coal slurry pyrolytic reaction device, includes: the system comprises a transport bed pyrolysis reaction device body, a spray gun for spraying coal water slurry and an ignition device for system ignition, which are arranged in the transport bed pyrolysis reaction device body, a gas-solid separation device and a material return device which are connected with the transport bed pyrolysis reaction device body, and a combustion-supporting air inlet which is arranged on the transport bed pyrolysis reaction device body and is used for providing combustion-supporting air; the reaction device is divided into a combustion area and a pyrolysis area, the coal water slurry can be pyrolyzed by setting reasonable residence time of the combustion area and the pyrolysis area and utilizing self combustion of fuel, and the higher gas yield of the coal water slurry pyrolysis is ensured by controlling the oxygen content in flue gas and adopting an anti-oxidation spray gun; meanwhile, the invention can also adopt the recirculated flue gas as the combustion-supporting gas, realize returning to the partial heat recovery of the system while facilitating to control oxygen amount; the gas-solid separation device is arranged at the outlet of the pyrolysis reaction device, so that the coke which is not burnt out is separated and returned to the pyrolysis device for continuous combustion, the heat utilization maximization is realized, and the energy consumption of the whole system is reduced. The device has the advantages of simple structure, scientific and reasonable structure, reliable work and long effective service life, and can meet the use requirement of conveniently providing the coal water slurry pyrolysis gas as the reducing gas in the low-nitrogen combustion transformation.
Description
Technical Field
The invention relates to a technology in the field of environmental protection, in particular to a transport bed coal water slurry pyrolysis reaction device.
Background
At present, the concentration of nitrogen oxides contained in the discharged exhaust gas of a power boiler must be less than 50mg/Nm by the environmental protection department of China 3 The industry has therefore been dealing with the minimum standard requirements by successively adapting existing boilers to achieve low nitrogen emissions. At present, the method is commonly realized by spraying ammonia reducing agents such as urea, ammonia gas and the like into the smoke to be discharged in the tail flue of the boiler, mixing the ammonia reducing agents with the smoke, and reducing partial NOx nitrogen oxides in the smoke, so as to reduce the concentration of the NOx in the discharged smoke. Although some success exists, there are reaction temperature window limitations and ammoniaSerious escape, high investment and operation cost, serious secondary pollution of the catalyst and the like, so the problems are not ideal from the aspects of economy, practicability and standard reaching of low-nitrogen emission of the boiler. The common fuel type reducing gas such as natural gas, coke oven gas, blast furnace gas and the like is limited by regions in application, and most boiler plants lack gas sources. The pyrolysis gas of coal water slurry contains a large amount of active reducing components (such as CH) 4 、H 2 CO, etc.) can be used as a reducing agent to reduce nitrogen oxides in smoke, and the reduction effect is good and is not limited by the producing area of the reducing agent, so that the reduction is proved to be widely concerned by students. However, in industrial application, the pyrolysis device is mostly used for pyrolyzing solid fuels (such as coal dust, biomass and the like) and liquid reducing agents (such as urea solution, ammonia water and the like), a fluidized bed or a fixed bed is mostly adopted structurally, and the existing equipment for pyrolyzing the coal-based solid-liquid mixed fuel of the coal water slurry cannot meet the requirement of the coal-based solid-liquid mixed fuel, so that the application of the coal water slurry pyrolysis gas as the reducing agent in the industry cannot be popularized at present. The research and development of the pyrolysis device which is suitable for taking the coal water slurry as the raw material has important practical significance for promoting the development of the low-nitrogen combustion technology.
Disclosure of Invention
The invention aims to overcome the technical problem that a coal water slurry pyrolysis device is not suitable in the development of a low-nitrogen combustion technology, and provides a transport bed coal water slurry pyrolysis reaction device which can realize high-efficiency pyrolysis of coal water slurry, maintain high gas yield and reduce production energy consumption.
The invention is realized by the following technical scheme:
the invention comprises the following steps: the device comprises a transport bed pyrolysis reaction device body, a coal water slurry spray gun arranged in the transport bed pyrolysis reaction device body, an ignition device for system ignition, a combustion-supporting air inlet for providing combustion-supporting air, a gas-solid separation device connected with the transport bed pyrolysis reaction device body and a material returning device.
Transport bed pyrolysis reaction device body be cylindrical, its shell adopts heat-resisting metal material to make, inside including the pyrolysis section that is used for coal slurry pyrolysis gasification reaction that adopts components of a whole that can function independently flange to connect gradually, be used for the fuel burning to provide the combustion section and the lime-ash section of heat for whole device, wherein: the liners of the combustion section and the pyrolysis section are made of refractory materials, each square meter of the liner is fixed by 1500-2000 claws with external threads and screw threads on the tops, so that the high-temperature resistance strength is improved, and a plurality of manholes for observing the reaction in the furnace and the pressure relief of the device are arranged along the height direction; the ignition device is arranged in the combustion section, and the combustion section is respectively connected with a circulating flue gas outlet and a material returning device of the boiler system; a plurality of the coal water slurry spray guns are uniformly and symmetrically arranged on two sides of the pyrolysis section, and outlets of the coal water slurry spray guns are connected with inlets of a gas-solid separation device for pyrolysis gas purification and material circulation; the bottom of the ash residue section is provided with an ash discharge port, and the ash residue section is arranged in a cone ring shape.
The upper end outlet of the gas-solid separation device is connected with a pyrolysis gas pipeline for conveying purified pyrolysis gas by the conveying bed pyrolysis reaction device body, the lower end outlet of the gas-solid separation device is connected with an inlet of the material returning device, an axially offset central cylinder with high separation efficiency is arranged in the gas-solid separation device, the axially offset central cylinder is made of heat-resistant and anti-abrasion materials, an inner lining of the axially offset central cylinder is made of refractory materials, and the axially offset central cylinder is more suitable for treating high-temperature pyrolysis mixed flue gas from the pyrolysis separation device body.
The ignition device adopts a plasma ignition mode, and a control system of the ignition device automatically starts to operate and cut off according to the temperature of a combustion section, so that a continuous and stable heat source is guaranteed to be provided for the pyrolysis reaction device.
The coal water slurry spray gun is made of an anti-abrasion heat-resistant material, the atomization angle of the spray nozzle is 30-60 degrees, the adjustment range between the spray nozzle and the wall surface is +/-15 degrees, the central pipe of the coal water slurry spray gun outputs atomized steam, the middle layer outputs coal water slurry, and the outermost layer outputs protective steam. In the invention, steam is used as an atomizing medium instead of compressed air, so that the coal water slurry can be prevented from being oxidized in the spraying process, and the pyrolysis efficiency is improved.
The pipeline of the material returning device is internally provided with fluidizing air for preventing the pipeline from being blocked, namely the material returning pipeline and the gas-solid separation device are connected with two high-momentum air with small flow area from the joint and blown into the high-momentum air, and the high-momentum air is supplemented into the joint to perform the fluidizing action.
And an L-shaped control valve is arranged at an outlet of the material returning device to regulate and control the flow of the returned material.
The invention relates to a coal water slurry pyrolysis reaction method of a transport bed based on the device, fuel sprayed into a combustion section is ignited and combusted through an ignition device, the fuel is the coal water slurry or coal powder used for preparing the coal water slurry, the combustion retention time is within 0.3s, the excess air coefficient during combustion is 1-1.05, combustion-supporting air can be heated air (the temperature is about 300 ℃) or circulating flue gas from a boiler system used together with the device, the temperature of the flue gas is 300-400 ℃, and the oxygen content in the flue gas is 5-8%. The ash residue after burning is discharged through the ash discharge port at the bottom of the ash residue section, the high-temperature rising flue gas after burning is fully mixed with the coal water slurry sprayed in through the spray gun with the waterproof coal slurry oxidation effect in the pyrolysis section, the coal water slurry is subjected to pyrolysis reaction under the high-temperature effect, and the steam serving as protection steam is also pyrolyzed into + OH with reduction active components at high temperature, so that the pyrolysis gas production rate is greatly improved. The residence time of the pyrolysis reaction is 0.5-1 s to ensure that the coal water slurry is fully pyrolyzed, the temperature in the pyrolysis section is always maintained above 950 ℃, the tar generated in the pyrolysis gasification reaction process can be fully pyrolyzed, and the tar is effectively prevented from being separated out to block the pipeline. Meanwhile, the spray gun is inclined downwards by 10 degrees when being arranged, so that the air flow can rise in a swirling manner in the device, the retention time is prolonged, and the pyrolysis reaction is fully carried out. The mixed flue gas containing pyrolysis gas components and output from the outlet of the transport bed pyrolysis device body enters a separation device to be subjected to gas-solid separation, the separated and purified pyrolysis gas passes through the upper end outlet of the separation device to enter a pyrolysis gas pipeline for production, and the separated particulate matters containing unburned carbon and the like are sent back to a combustion section through a material returning device to be continuously combusted, so that the heat utilization is maximized, the energy consumption of the whole system is reduced, and the effects of high efficiency and low energy consumption of coal water slurry pyrolysis are finally realized.
Technical effects
The invention skillfully adopts the structure and the working principle of the transport bed, divides the pyrolysis reaction device body into a combustion section and a pyrolysis section, and ensures that high-temperature flue gas generated by combustion at the lower part of the device body just provides heat for pyrolysis of the coal water slurry sprayed in the middle part by designing the functional configuration and the reasonable residence time of different sections, the high-efficiency pyrolysis of the coal water slurry can be realized by utilizing fuel, the operation is convenient, the method is feasible, and the high gas yield of the coal water slurry pyrolysis is ensured by controlling the oxygen content in the flue gas and adopting a spray gun with steam protection. The design of the invention can also adopt medium-temperature circulating flue gas as combustion-supporting air, on one hand, the medium-temperature flue gas improves the temperature of a combustion area, which is more beneficial to ignition and stable combustion, on the other hand, the oxygen content in the flue gas is low, which can effectively control the oxygen content of the combustion area, so as to form a reducing atmosphere in the pyrolysis section, which is beneficial to the pyrolysis of the sprayed coal water slurry, and the high pyrolysis gas yield is ensured on the basis of realizing heat recovery.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a water-coal-slurry lance;
in the figure: the device comprises a transport bed pyrolysis reaction device body 1, a coal water slurry spray gun 2, an ignition device 3, a gas pipeline 4, a gas-solid separation device 5, a material return device 6, a combustion-supporting air inlet 7, a refractory lining 11, a pyrolysis section 12, a connecting flange 13, a combustion section 14, a manhole 15, an ash slag section 16, a pyrolysis gas outlet 17, an atomization steam channel 21, a coal water slurry channel 22, a protection steam channel 23, a nozzle 24, a material inlet 51, a gas outlet 52, a central cylinder 53, a fluidized air pipe 61 and a material return device outlet 62.
Detailed Description
As shown in fig. 1 and 2, the present embodiment includes: the interconnected transports bed pyrolysis reaction device body 1, gas-solid separator 5 and returning charge device 6 to and set up the ignition 3 in transporting bed pyrolysis reaction device body 1, wherein: the conveying bed pyrolysis reaction device body 1 is connected with a material inlet 51 of the gas-solid separation device through a pyrolysis gas outlet 17, and the conveying bed pyrolysis reaction device body 1 is connected with the bottom of the gas-solid separation device 5 through a material return device 6.
The transport bed pyrolysis reaction device body 1 comprises: a pyrolysis section 12, a combustion section 14 and an ash section 16 connected in sequence, wherein: every section is by components of a whole that can function independently flange joint, and pyrolysis section, pyrolysis gasification section and burning zone all are equipped with a plurality of manholes 15, and the both sides equipartition of pyrolysis section and burning zone B has a plurality of coal slurry spray guns 2, and the burning zone is equipped with combustion-supporting air entry 7.
The inner lining of the pyrolysis reaction device body 1 of the transport bed is made of refractory materials 11, and 1500-2000 nails with external threads and screw threads are adopted to fix the inner lining per square meter so as to improve the high-temperature resistance strength.
The ignition device 3 adopts a plasma ignition mode, uses intelligent system control, automatically operates and cuts off according to the temperature of a combustion section, ensures that a continuous and stable heat source is provided for the operation of the transport bed pyrolysis reaction device body 1, and avoids system stop operation caused by other equipment faults.
The bottom of lime-ash section 16 be equipped with the ash discharge mouth, the lime-ash section is the cone annular and arranges, can reduce the slag and block up the risk, improve ash discharge efficiency.
The gas-solid separation device 5 is internally provided with an axially offset central cylinder 53.
The coal water slurry spray gun 2 is connected with the middle wall surface of the transport bed pyrolysis reaction device body 1, wherein an atomizing steam channel 21, a coal water slurry channel 22, a protective steam channel 23 and a nozzle 24 which is rotatably arranged are arranged, wherein: the adjustment range between the nozzle 24 and the wall of the coal-water slurry lance 2 is +/-15 deg..
The nozzle 24 is made of an anti-abrasion material to prolong the service life of the spray gun, when the water-coal-slurry spray gun 2 adopts steam atomization, the atomization angle is 30-60 degrees, and meanwhile, the protective steam is added on the outer layer, so that the water-coal-slurry is prevented from contacting with excessive oxygen in the spraying process, and the pyrolysis reaction of the water-coal-slurry is fully carried out.
The excess air coefficient of the combustion section is 1-1.05, the bottom combustion residence time is within 0.3s, and the pyrolysis section residence time is 0.5-1 s to ensure the full pyrolysis of the coal water slurry.
The gas-solid separation device 5 separates unburned coke and purifies pyrolysis gas entering the furnace, the separated coke enters the transport bed pyrolysis reaction device body 1 through the material returning device 6 to be combusted, and heating air or medium-temperature flue gas in the furnace is input through the combustion-supporting air inlet 7 to serve as combustion-supporting gas.
The embodiment relates to a pyrolysis reaction method of coal water slurry of a transport bed of the device, which comprises the following steps: coal water slurry enters the transport bed pyrolysis reaction device body 1 through the coal water slurry spray gun 2 to be pyrolyzed, the ignition device 3 ignites the coal water slurry or pulverized coal fuel for producing the coal water slurry to burn when the operation is started, heat is provided for pyrolyzing the coal water slurry sprayed in the pyrolysis section, pyrolysis products enter the gas-solid separation device 5 through the pyrolysis gas outlet through the material inlet 17 and are separated and purified, separated pyrolysis gas is output through the gas outlet 52 to be used for production, non-pyrolyzed coke enters the combustion section 14 of the transport bed pyrolysis reaction device through the material return device 6 to continuously participate in combustion, oxygen required by combustion is provided through the combustion-supporting air inlet 7, the situation that the pyrolysis gas rate is influenced by the fact that the oxygen amount in the transport bed pyrolysis reaction device body 1 is too high is avoided, and the ignition device 3 stops operating after the coke at the bottom of the pyrolysis gas is stably combusted.
The method preferably further creates a high-temperature and reductive atmosphere for the pyrolysis section reaction zone by controlling the oxygen amount in the combustion flue gas of the combustion section 14, thereby providing favorable conditions for the pyrolysis of the coal water slurry.
The control method has the advantages that steam is adopted to replace traditional compressed air as an atomizing medium, so that excessive oxygen contact of the coal water slurry in the spraying process can be avoided, protective steam is further arranged on the outermost layer of the coal water slurry spray gun, on one hand, the steam of high-speed jet flow can penetrate through smoke gas which rises in a rotating mode, the coal water slurry and the smoke gas are fully mixed, on the other hand, water vapor is pyrolyzed at high temperature to form OH ions, reducing active components in pyrolysis gas are increased, the gas production rate in the pyrolyzing process is improved, and the fuel utilization rate is increased.
Compared with the prior art, the invention has the advantages that: according to the invention, the residence time and oxygen amount of the combustion section and the pyrolysis section are strictly controlled to realize high-efficiency conversion of pyrolysis gas, unburned carbon in pyrolysis products is separated by the gas-solid separation device, and then the pyrolysis products are sent back to the transport bed pyrolysis reaction device body 1 through the return device 6 to be combusted, and hot air or circulating flue gas provides oxygen required by coke combustion, so that not only can heat be fully recycled, but also excessive oxygen can be prevented from entering the transport bed pyrolysis reaction device body to oxidize the coal water slurry, and the high-efficiency and low-energy consumption coal water slurry pyrolysis is realized.
Through specific practical experiments, under the condition that the concentration of the coal water slurry is more than 60%, the pyrolysis reaction device normally operates, and bituminous coal is used, so that the experimental data can be obtained as follows: reducing components in the pyrolysis gas at the outlet of the pyrolysis reaction device reach more than 40 percent.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (1)
1. The utility model provides a transport bed coal water slurry pyrolytic reaction method based on transport bed coal water slurry pyrolytic reaction device which characterized in that, this transport bed coal water slurry pyrolytic reaction device includes: the device comprises a transport bed pyrolysis reaction device body, a coal water slurry spray gun arranged in the transport bed pyrolysis reaction device body, an ignition device for system ignition, a combustion-supporting air inlet for providing combustion-supporting air, a gas-solid separation device connected with the transport bed pyrolysis reaction device body and a material returning device;
transport bed pyrolysis reaction unit body be cylindrical, its shell adopts heat-resisting metal material to make, inside including the pyrolysis section that is used for coal slurry pyrolysis gasification reaction that adopts the components of a whole that can function independently flange to connect gradually, be used for the fuel burning for whole device provides the combustion section and the cinder section of heat, wherein: the liners of the combustion section and the pyrolysis section are made of refractory materials, each square meter of the liner is fixed by 1500-2000 claws with external threads and screw threads on the tops, so that the high-temperature resistance strength is improved, and a plurality of manholes for observing the reaction in the furnace and the pressure relief of the device are arranged along the height direction; the ignition device is arranged in the combustion section, and the combustion section is respectively connected with a circulating flue gas outlet and a material returning device of the boiler system; a plurality of coal water slurry spray guns are uniformly and symmetrically arranged on two sides of the pyrolysis section, and outlets of the coal water slurry spray guns are connected with inlets of a gas-solid separation device for pyrolysis gas purification and material circulation; the bottom of the ash residue section is provided with an ash discharge port, and the ash residue section is arranged in a cone ring shape;
the upper end outlet of the gas-solid separation device is connected with a pyrolysis gas pipeline for conveying purified pyrolysis gas by the conveying bed pyrolysis reaction device body, the lower end outlet of the gas-solid separation device is connected with the inlet of the material returning device through, an axially offset central cylinder with high separation efficiency is arranged in the gas-solid separation device, the axially offset central cylinder is made of heat-resistant and anti-wear materials, the inner lining of the axially offset central cylinder is made of refractory materials, and the axially offset central cylinder is more suitable for treating high-temperature pyrolysis mixed flue gas from the pyrolysis separation device body;
the ignition device adopts a plasma ignition mode, and a control system of the ignition device automatically starts to operate and is cut off according to the temperature of a combustion section, so that a continuous and stable heat source is provided for the pyrolysis reaction device;
the coal water slurry spray gun is made of an anti-abrasion heat-resistant material, the atomization angle of the spray nozzle is 30-60 degrees, the adjustment range between the spray nozzle and the wall surface is +/-15 degrees, the central pipe of the coal water slurry spray gun outputs atomized steam, the middle layer outputs coal water slurry, and the outermost layer outputs protective steam;
an axially offset central cylinder with high separation efficiency is arranged in the gas-solid separation device, the axially offset central cylinder is made of heat-resistant and anti-wear materials, and the inner lining of the axially offset central cylinder is made of refractory materials;
the pipeline of the material returning device is internally provided with fluidizing air for preventing the pipeline from being blocked, namely the material returning pipeline and the gas-solid separation device are connected with two high-momentum air with small flow area from the joint and blown into the high-momentum air, and the high-momentum air is supplemented into the joint for fluidizing;
the outlet of the material returning device is provided with an L-shaped control valve for adjusting and controlling the material returning flow, namely, the traditional compressed air is replaced by steam as an atomizing medium, so that the coal water slurry can be prevented from contacting excessive oxygen in the spraying process, the outermost layer of the coal water slurry spray gun is further provided with protective steam, on one hand, the steam of high-speed jet flow can penetrate through the smoke gas which rises in a rotating manner, the coal water slurry and the smoke gas are fully mixed, on the other hand, the steam is pyrolyzed at high temperature to generate OH ions, the reduction active components in pyrolysis gas are increased, the gas production rate in the pyrolyzing process is improved, and the fuel utilization rate is increased;
the transportation bed coal water slurry pyrolytic reaction method is characterized in that fuel sprayed into a combustion section is ignited and combusted through an ignition device, the fuel is coal water slurry with the concentration of more than 60% or pulverized coal for preparing the coal water slurry, the combustion retention time is within 0.3s, the excess air coefficient during combustion is 1-1.05, combustion-supporting air is from medium-temperature flue gas extracted from a circulating flue gas inlet, the temperature is 300-400 ℃, and the oxygen content in the flue gas is 5-8%; discharging the burnt ash through an ash discharge port at the bottom of the ash section, fully mixing the burnt high-temperature rising flue gas with the coal water slurry sprayed by a spray gun with a waterproof coal slurry oxidation effect in a pyrolysis section, carrying out pyrolysis reaction on the coal water slurry under the action of high temperature, wherein the residence time of the pyrolysis reaction is 0.5-1 s to ensure that the coal water slurry is fully pyrolyzed, and the temperature in the pyrolysis section is always maintained above 950 ℃ so as to fully pyrolyze tar generated in the pyrolysis gasification reaction process; the mixed flue gas containing pyrolysis gas components output from the outlet of the transport bed pyrolysis device body enters a separation device for gas-solid separation, the separated and purified pyrolysis gas enters a pyrolysis gas pipeline through the outlet at the upper end of the separation device for production, and the separated particles containing unburned carbon are sent back to the combustion section through a return device for continuous combustion.
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| CN202010320505.1A CN111394136B (en) | 2020-04-22 | 2020-04-22 | Transport bed coal water slurry pyrolytic reaction device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2180643Y (en) * | 1994-01-27 | 1994-10-26 | 中国科学院山西煤炭化学研究所 | Gasification device for ash smelting fluidized bed |
| CN1125163A (en) * | 1995-09-07 | 1996-06-26 | 华东理工大学 | Three-way channel combined water coal slurry gasification nozzle with cyclone |
| CN1186840A (en) * | 1998-01-19 | 1998-07-08 | 华东理工大学 | Coal water slurry or pulverized coal gasifying furnace with oppositely arranged nozzles |
| CN101003755A (en) * | 2006-01-19 | 2007-07-25 | 神华集团有限责任公司 | Gasification stove with multi nozzle, and gasification method |
| CN101508915A (en) * | 2009-03-17 | 2009-08-19 | 上海惠生化工工程有限公司 | Gasifying device for liquid fuel or solid fuel aqueous slurry |
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2020
- 2020-04-22 CN CN202010320505.1A patent/CN111394136B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180643Y (en) * | 1994-01-27 | 1994-10-26 | 中国科学院山西煤炭化学研究所 | Gasification device for ash smelting fluidized bed |
| CN1125163A (en) * | 1995-09-07 | 1996-06-26 | 华东理工大学 | Three-way channel combined water coal slurry gasification nozzle with cyclone |
| CN1186840A (en) * | 1998-01-19 | 1998-07-08 | 华东理工大学 | Coal water slurry or pulverized coal gasifying furnace with oppositely arranged nozzles |
| CN101003755A (en) * | 2006-01-19 | 2007-07-25 | 神华集团有限责任公司 | Gasification stove with multi nozzle, and gasification method |
| CN101508915A (en) * | 2009-03-17 | 2009-08-19 | 上海惠生化工工程有限公司 | Gasifying device for liquid fuel or solid fuel aqueous slurry |
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