CN110295062B - Control method for stable operation of gasification device after part of coal line jumping - Google Patents
Control method for stable operation of gasification device after part of coal line jumping Download PDFInfo
- Publication number
- CN110295062B CN110295062B CN201810245036.4A CN201810245036A CN110295062B CN 110295062 B CN110295062 B CN 110295062B CN 201810245036 A CN201810245036 A CN 201810245036A CN 110295062 B CN110295062 B CN 110295062B
- Authority
- CN
- China
- Prior art keywords
- coal
- pipeline
- gasification
- pipelines
- coal powder
- 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.)
- Active
Links
Images
Classifications
-
- 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
- C10J3/50—Fuel charging devices
- C10J3/506—Fuel charging devices for entrained flow gasifiers
-
- 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
- C10J3/72—Other features
- C10J3/723—Controlling or regulating the gasification process
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Air Transport Of Granular Materials (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a control method for stable operation of a gasification device after partial coal line skip, wherein the gasification device comprises a feed tank, a weighing tank, a gasification burner, an oxygen supply device, a purging device and a gasification furnace; when a part of pulverized coal pipelines jump, the invention keeps the material flow stable through matching among the pulverized coal pipelines based on the configuration of the pipelines for conveying pulverized coal, thereby realizing the stable control of the gasification device. The invention better solves the problem of gasification device fluctuation caused by the trip of partial coal lines due to the fault of the coal powder pipeline, and provides guarantee for the safe long-period stable operation of the gasification device.
Description
Technical Field
The invention relates to a method for controlling the stable operation of a gasification device after the jumping of a part of coal lines, belonging to the field of the control of the stable operation of the gasification device.
Background
Coal gasification is one of the main approaches for clean and efficient conversion and utilization of coal, wherein the pulverized coal entrained flow pressurized gasification technology is the mainstream development direction of the coal gasification technology due to the characteristics of strong coal adaptability, advanced gasification indexes and the like. At present, in order to meet the requirement of large-scale gasification, a plurality of pulverized coal pipelines are generally adopted, pulverized coal pneumatic conveying is easily affected by factors such as impurities in pulverized coal and valve faults, so that coal line tripping is caused, if a control scheme is not adjusted in time, the pressure of a gasification device is greatly fluctuated, stable production of a rear system is affected, in addition, a water-cooled wall of a gasification furnace and a gasification burner are likely to face ablation risks along with the great change of the flow of materials such as the pulverized coal, and the safe long-period stable operation of the gasification device is finally affected.
A related method is provided for safety control after a part of coal lines of a pulverized coal gasification device jump, and the related method is as follows: 200910018249.4, 201110412818.0, 201410487968.1 and 201510395039.2, but no report is found on a method for controlling the stable operation of a gasification device after a part of coal lines jump over, so that a method for controlling the stable operation of a gasification device after a part of coal lines jump over is needed to realize the safe long-period stable operation of a gasification device of a pulverized coal entrained flow bed.
Disclosure of Invention
The invention provides a control method for stable operation of a gasification device after partial coal line skip, which solves the problem of gasification system fluctuation caused by partial coal line skip, effectively avoids large pressure fluctuation of the gasification device, and reduces the ablation risk of a water-cooled wall lining and a gasification burner.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a control method for the stable operation of a gasification device after the skip of a part of coal lines is carried out, wherein the gasification device comprises a feeding tank, a weighing tank, a gasification burner, an oxygen supply device, a purging device and a gasification furnace;
the coal powder in the feeding tank enters a gasification burner through more than two coal powder pipelines, the gasification burner is arranged on a gasification furnace, and the pressure of the gasification furnace is controlled by a pressure regulating valve at the outlet of the gasification furnace;
each pulverized coal pipeline is respectively provided with a pulverized coal flow regulating valve and a pulverized coal shut-off valve, wherein the direction from the pulverized coal flow regulating valve to the pulverized coal shut-off valve is consistent with the direction from the feeding tank to the gasification burner;
the oxygen supply device is communicated to the gasification burner through more than two oxygen conveying pipelines, the number of the oxygen conveying pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, and each oxygen conveying pipeline is provided with an oxygen cut-off valve;
the blowing device is divided into more than two blowing pipelines, the number of the blowing pipelines is equal to that of the coal powder pipelines and corresponds to the coal powder pipelines one by one, each blowing pipeline is communicated with the corresponding coal powder pipeline, and each blowing pipeline is provided with a blowing gas stop valve;
the weighing tank is divided into more than two circulating pipelines, the number of the circulating pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, each circulating pipeline is communicated with the corresponding pulverized coal pipeline, and each circulating pipeline is provided with a circulating pipeline cut-off valve;
after a part of pulverized coal pipelines jump, the control method for the stable operation of the gasification device comprises the following steps:
1) the pressure regulating valve of the gasification furnace is changed into manual control, and the opening degree of the valve is reduced;
2) closing a coal powder flow regulating valve and a coal powder cut-off valve on a vehicle jumping coal powder pipeline, opening a purge gas cut-off valve on a purge pipeline corresponding to the vehicle jumping coal powder pipeline for purging the coal powder pipeline, and simultaneously closing an oxygen cut-off valve on an oxygen pipeline corresponding to the vehicle jumping coal powder pipeline;
3) adjusting a coal powder flow regulating valve and an oxygen flow regulating valve on a coal powder pipeline which still runs, improving the loads of coal powder and oxygen, and maintaining certain load running;
4) after the fault treatment of the skip car coal powder pipeline is finished, opening a flow regulating valve and a circulating pipeline cut-off valve of the coal powder pipeline, conveying coal powder of a feeding tank into a weighing tank, regulating the flow of the coal powder to a feeding set value, opening the coal powder cut-off valve after the circulating flow of the coal powder is stable, closing the circulating pipeline cut-off valve, conveying the coal powder into a gasification burner, then opening a corresponding oxygen cut-off valve, closing a corresponding purge gas cut-off valve, regulating the flow of the coal powder and the flow of oxygen to the set value, simultaneously regulating the opening degree of a pressure regulating valve to the set value, and recovering system parameters to the level before skip.
By the method, the fluctuation of the gasification device caused by the skip of part of pulverized coal pipelines can be reduced.
When part of coal lines suddenly jump, the jumping coal powder pipeline is immediately blown and simultaneously corresponding oxygen is cut off, and in addition, a pressure regulating valve of a gasification system is changed into manual control to stabilize the system pressure; the load of the coal line running without jumping is increased, and the corresponding oxygen flow is increased at the same time.
Before the skip coal line is recovered, coal dust circulation is established, and after the flow of the coal dust is stable, the coal dust is put into a gasification furnace, and meanwhile, corresponding oxygen is put into the gasification furnace; the flow rates of the coal dust and the oxygen of the coal line are gradually reduced; stabilizing the system pressure through a gasification system pressure regulating valve; and restoring the gasification device to the set value before the vehicle jumps.
In order to further improve the stability of operation, the operating pressure in the gasifier before the vehicle jumps is 0.5-5.0 MPag.
The pressure fluctuation range of the gasifier before and after the vehicle is jumped can be controlled to be 0.1-0.3 MPag.
In order to improve the safety and the economical efficiency of the purging, the purging gas in the purging device is nitrogen or carbon dioxide.
In order to take safety and cost into consideration, the number of the pulverized coal pipelines is preferably 2-10, and the number of the pulverized coal pipelines is further preferably 2-6.
The invention is based on the pipeline configuration of the pulverized coal conveying, the stable material flow is kept through the matching among the pulverized coal pipelines, and the stable control of the gasification device is realized.
The prior art is referred to in the art for techniques not mentioned in the present invention.
The control method for the stable operation of the gasification device after the skip of part of the coal lines can solve the problem of the fluctuation of the gasification device caused by the skip of part of the coal lines due to the fault of the pulverized coal pipelines, provides guarantee for the safe long-period stable operation of the gasification device, and has the characteristics of simple operation, good system fluctuation resistance and the like.
Drawings
FIG. 1 is a schematic view of a gasification apparatus according to the present invention;
in the figure, 1 a feeding tank, 2 a weighing tank, 3 a gasification burner, 4 a gasification furnace, 5 a pulverized coal flow regulating valve, 6 a pulverized coal shut-off valve, 7 a circulating pipeline shut-off valve, 8 an oxygen shut-off valve, 9 a purge gas shut-off valve, 10 a pressure regulating valve, 11 a purging device and 12 oxygen are arranged;
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
As shown in fig. 1, the gasification device comprises a feed tank, a weighing tank, a gasification burner, an oxygen supply device, a purging device and a gasification furnace;
the coal powder in the feeding tank enters a gasification burner through more than two coal powder pipelines, the gasification burner is arranged on a gasification furnace, and the pressure of the gasification furnace is controlled by a pressure regulating valve at the outlet of the gasification furnace;
each pulverized coal pipeline is respectively provided with a pulverized coal flow regulating valve and a pulverized coal shut-off valve, wherein the direction from the pulverized coal flow regulating valve to the pulverized coal shut-off valve is consistent with the direction from the feeding tank to the gasification burner;
the oxygen supply device is communicated to the gasification burner through more than two oxygen conveying pipelines, the number of the oxygen conveying pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, and each oxygen conveying pipeline is provided with an oxygen cut-off valve;
the blowing device is divided into more than two blowing pipelines, the number of the blowing pipelines is equal to that of the coal powder pipelines and corresponds to the coal powder pipelines one by one, each blowing pipeline is communicated with the corresponding coal powder pipeline, and each blowing pipeline is provided with a blowing gas stop valve;
the weighing tank is divided into more than two circulating pipelines, the number of the circulating pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, each circulating pipeline is communicated with the corresponding pulverized coal pipeline, and each circulating pipeline is provided with a circulating pipeline cut-off valve;
after a part of pulverized coal pipelines jump, the control method for the stable operation of the gasification device comprises the following steps:
1) the pressure regulating valve is changed into manual control, and the opening degree of the valve is reduced;
2) closing a coal powder flow regulating valve and a coal powder cut-off valve on a vehicle jumping coal powder pipeline, opening a purge gas cut-off valve on a purge pipeline corresponding to the vehicle jumping coal powder pipeline for purging the coal powder pipeline, and simultaneously closing an oxygen cut-off valve on an oxygen pipeline corresponding to the vehicle jumping coal powder pipeline;
3) adjusting a coal powder flow regulating valve and an oxygen flow regulating valve on a coal powder pipeline which still runs, improving the loads of coal powder and oxygen, and maintaining certain load running;
4) after the fault treatment of the skip car coal powder pipeline is finished, opening a flow regulating valve and a circulating pipeline cut-off valve of the coal powder pipeline, conveying coal powder of a feeding tank into a weighing tank, regulating the flow of the coal powder to a feeding set value, opening the coal powder cut-off valve after the circulating flow of the coal powder is stable, closing the circulating pipeline cut-off valve, conveying the coal powder into a gasification burner, then opening a corresponding oxygen cut-off valve, closing a corresponding purge gas cut-off valve, regulating the flow of the coal powder and the flow of oxygen to the set value, simultaneously regulating the opening degree of a pressure regulating valve to the set value, and recovering system parameters to the level before skip.
Example 1
1000 tons of coal gasification units of daily treatment, the coal dust pipeline has 2, 4.0MPag of gasification pressure, adopt the powdered coal to feed, the top of the gasification furnace sets up a gasification burner, set up two coal dust pipelines and two oxygen pipelines that correspond, the gasification unit operates stably and controllably when taking place the single coal dust pipeline and jumping the vehicle, the main step is as follows:
(1) the system pressure regulating valve is switched to manual control, the opening of the valve is 20%, and the pressure of the gasification system is reduced to 3.8 MPag;
(2) the skip coal line is correspondingly cut off by oxygen and the skip coal line is cut off by nitrogen (or CO)2) Purging;
(3) the coal powder and oxygen load of the coal line is increased, and the burner of the gasification furnace is protected;
(4) after the fault treatment of the skip coal line is completed, the coal powder circulation of the skip coal line is established based on the configuration of the feeding tank, the weighing tank and the coal powder circulation pipeline, and the specific parameters comprise: coal powder flow rate of 8t/h and conveying speed>5m/s, density 200kg/m3Corresponding to an oxygen flow of 5000Nm3After the circulation is stable, the coal powder and the oxygen are put into the gasification furnace, the flow of the coal powder and the oxygen is gradually increased, the flow of the coal powder and the oxygen corresponding to the other coal line is gradually reduced, and finally the flow of the material entering the gasification furnace reaches a set value, namely 41t/h of the coal powder and 25000Nm of the oxygen3H; and (3) the opening of the pressure regulating valve out of the gasification boundary area is 25%, the pressure of the gasification system is stabilized at 4.0MPag, and the pressure fluctuation range of the gasification furnace before and after the vehicle jumps is 0.1-0.2 MPag.
Claims (6)
1. A control method for stable operation of a gasification device after part of coal lines jump is characterized by comprising the following steps: the gasification device comprises a feed tank, a weighing tank, a gasification burner, an oxygen supply device, a purging device and a gasification furnace;
the coal powder in the feeding tank enters a gasification burner through more than two coal powder pipelines, the gasification burner is arranged on a gasification furnace, and the pressure of the gasification furnace is controlled by a pressure regulating valve at the outlet of the gasification furnace;
each pulverized coal pipeline is respectively provided with a pulverized coal flow regulating valve and a pulverized coal shut-off valve, wherein the pulverized coal flow regulating valve and the pulverized coal shut-off valve are sequentially arranged along the direction from the feeding tank to the gasification burner;
the oxygen supply device is communicated to the gasification burner through more than two oxygen conveying pipelines, the number of the oxygen conveying pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, and each oxygen conveying pipeline is provided with an oxygen cut-off valve;
the blowing device is divided into more than two blowing pipelines, the number of the blowing pipelines is equal to that of the coal powder pipelines and corresponds to the coal powder pipelines one by one, each blowing pipeline is communicated with the corresponding coal powder pipeline, and each blowing pipeline is provided with a blowing gas stop valve;
the weighing tank is divided into more than two circulating pipelines, the number of the circulating pipelines is equal to that of the pulverized coal pipelines and corresponds to that of the pulverized coal pipelines one by one, each circulating pipeline is communicated with the corresponding pulverized coal pipeline, and each circulating pipeline is provided with a circulating pipeline cut-off valve;
after a part of pulverized coal pipelines jump, the control method for the stable operation of the gasification device comprises the following steps:
1) the pressure regulating valve on the gasification furnace is changed into manual control, and the opening degree of the valve is reduced;
2) closing a coal powder flow regulating valve and a coal powder cut-off valve on a vehicle jumping coal powder pipeline, opening a purge gas cut-off valve on a purge pipeline corresponding to the vehicle jumping coal powder pipeline for purging the coal powder pipeline, and simultaneously closing an oxygen cut-off valve on an oxygen pipeline corresponding to the vehicle jumping coal powder pipeline;
3) adjusting a coal powder flow regulating valve and an oxygen flow regulating valve on a coal powder pipeline which still runs, improving the loads of coal powder and oxygen, and maintaining certain load running;
4) after the fault treatment of the skip coal powder pipeline is finished, opening a flow regulating valve and a circulating pipeline stop valve of the coal powder pipeline, conveying coal powder of a feeding tank into a weighing tank, regulating the flow of the coal powder to a feeding set value, opening the coal powder stop valve after the circulating flow of the coal powder is stable, closing the circulating pipeline stop valve, conveying the coal powder into a gasification burner, then opening a corresponding oxygen stop valve, closing a corresponding purge gas stop valve, gradually reducing the flow of the coal powder and the flow of oxygen of the coal operation line, regulating the flow of the coal powder and the flow of the oxygen to the set value, simultaneously regulating the opening of a pressure regulating valve to the set value, and recovering system parameters to the level before the skip.
2. The method for controlling the stable operation of the gasification device after the partial coal line skip according to claim 1, wherein: the operating pressure in the gasifier before jumping is 0.5-5.0 MPag.
3. The method for controlling stable operation of the gasification device after partial coal line skip according to claim 1 or 2, characterized by comprising the following steps: and controlling the pressure fluctuation range of the gasification furnace to be 0.1-0.3 MPag before and after the vehicle-jumping.
4. The method for controlling stable operation of the gasification device after partial coal line skip according to claim 1 or 2, characterized by comprising the following steps: the purge gas in the purge device is nitrogen or carbon dioxide.
5. The method for controlling stable operation of the gasification device after partial coal line skip according to claim 1 or 2, characterized by comprising the following steps: the pulverized coal pipeline has 2~ 10.
6. The method for controlling stable operation of the gasification device after partial coal line skip according to claim 1 or 2, characterized by comprising the following steps: the number of the pulverized coal pipelines is 2-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245036.4A CN110295062B (en) | 2018-03-23 | 2018-03-23 | Control method for stable operation of gasification device after part of coal line jumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245036.4A CN110295062B (en) | 2018-03-23 | 2018-03-23 | Control method for stable operation of gasification device after part of coal line jumping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110295062A CN110295062A (en) | 2019-10-01 |
| CN110295062B true CN110295062B (en) | 2020-06-16 |
Family
ID=68025931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810245036.4A Active CN110295062B (en) | 2018-03-23 | 2018-03-23 | Control method for stable operation of gasification device after part of coal line jumping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110295062B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112592740A (en) * | 2020-12-07 | 2021-04-02 | 新奥科技发展有限公司 | Control method of gasification furnace |
| CN114184222A (en) * | 2021-10-11 | 2022-03-15 | 华能(浙江)能源开发有限公司玉环分公司 | Powder accumulation fire prevention detection method and device for pulverized coal pipe |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703921C3 (en) * | 1977-01-31 | 1980-09-11 | Basf Ag, 6700 Ludwigshafen | Process for commissioning or making a reactor operational for the partial oxidation of non-volatile liquid or solid fuels |
| CN1279314C (en) * | 2003-11-03 | 2006-10-11 | 华东理工大学 | Equipment and implementing method capable of regulation controlling and uniform distributing flux of powdered coal |
| US20080307704A1 (en) * | 2007-06-12 | 2008-12-18 | Clean Coal Power R&D Co., Ltd. | Coal gasification plant and method for operating the same |
| CN101104821A (en) * | 2007-07-09 | 2008-01-16 | 湖北宜化集团有限责任公司 | Coal gas producing system parallel-connected operation method |
| CN203060919U (en) * | 2013-01-10 | 2013-07-17 | 中煤科工集团武汉设计研究院 | On-line filtering device of coal conveying pipeline |
| CN203513611U (en) * | 2013-08-23 | 2014-04-02 | 西安宝德粉末冶金有限责任公司 | Multi-branch discharging inflatable cone device for transporting powdered coal |
| CN105446382B (en) * | 2014-09-22 | 2018-04-03 | 中国石化扬子石油化工有限公司 | A kind of method of fine coal entrained flow gasifying furnace gun pressure power stability contorting |
| CN204097418U (en) * | 2014-09-28 | 2015-01-14 | 新奥科技发展有限公司 | A kind of vapourizing furnace feed system |
| CN204170918U (en) * | 2014-10-20 | 2015-02-25 | 航天长征化学工程股份有限公司 | Gasification furnace coal powder conveying system rotary type filter |
| CN206607201U (en) * | 2017-03-23 | 2017-11-03 | 山东晋煤明水化工集团有限公司 | Gasifying powder coal device |
| CN106906004B (en) * | 2017-03-23 | 2022-08-02 | 山东明泉新材料科技有限公司 | Pulverized coal gasification control method and pulverized coal gasification device |
-
2018
- 2018-03-23 CN CN201810245036.4A patent/CN110295062B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110295062A (en) | 2019-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110295062B (en) | Control method for stable operation of gasification device after part of coal line jumping | |
| EP1959002B1 (en) | Method of gasification burner online feeding | |
| CN103395745B (en) | Prevent hydrogen chloride gas from crossing the interlocking signal system and method for chlorine | |
| CN204943038U (en) | A kind of pressure regulating system of hydrogen pipe network | |
| CN106350119B (en) | A kind of the coal oxygen conveyance control method and device of coal gasification apparatus | |
| CN105114810A (en) | Pressure adjusting system for hydrogen pipe network and using method | |
| CN110791325B (en) | Feeding method for pulverized coal burner of multi-nozzle slurry gasification furnace | |
| CN102418918A (en) | Method for eliminating influence of backpressure change of air-cooled unit on automatic gain control (AGC) regulation quality | |
| CN109628670B (en) | Air supply recovery method | |
| CN203392852U (en) | Interlocking signal system for preventing hydrogen chloride gas from being subjected to superchlorination | |
| CN109268873A (en) | A kind of control method of the disconnected coal of coal feeder of boiler | |
| JP4294963B2 (en) | Method and facility for supplying air separation device by gas turbine | |
| CN205556580U (en) | Modified buggy pressurization control system | |
| CN104909342B (en) | System for guaranteeing normal shut-down sulfur blow in sulfur recovery process | |
| CN203212590U (en) | Oxygen coal gun cooling medium regulating and controlling system | |
| CN202208706U (en) | Safety automatic interlocking protecting device of batch-type gas making furnace of static bed | |
| CN208975491U (en) | Fuel gas displacement drying device and fuel gas regenerative system | |
| CN207452035U (en) | A kind of broken coal gasification improves the device of the ash lock cycle of operation | |
| CN206607201U (en) | Gasifying powder coal device | |
| CN110408435A (en) | A kind of online switching method of single injector overhead type air flow bed powder coal gasification furnace | |
| CN204182376U (en) | Produce dimethyl sulfoxide (DMSO) sulfide oxidation tower | |
| CN220376372U (en) | Combined regulating and controlling device for preparing ammonia water by cross process | |
| CN104845674A (en) | Furnace steam volume decreasing semi-water gas production process | |
| CN105446382B (en) | A kind of method of fine coal entrained flow gasifying furnace gun pressure power stability contorting | |
| JP2003514108A (en) | Fluidized bed collapse prevention device for fluidized bed reduction furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |