CN211057041U - Gasification agent distribution control device of circulating fluidized bed gasification furnace - Google Patents
Gasification agent distribution control device of circulating fluidized bed gasification furnace Download PDFInfo
- Publication number
- CN211057041U CN211057041U CN201922184892.6U CN201922184892U CN211057041U CN 211057041 U CN211057041 U CN 211057041U CN 201922184892 U CN201922184892 U CN 201922184892U CN 211057041 U CN211057041 U CN 211057041U
- Authority
- CN
- China
- Prior art keywords
- oxygen
- steam
- gasification
- gasification furnace
- control system
- 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
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
A distribution control device of a gasification agent of a circulating fluidized bed gasification furnace comprises: a steam control system that controls output of steam; an oxygen control system for controlling the output of oxygen; the accident nitrogen protection system controls the output of nitrogen, and the output end of the accident nitrogen protection system is connected with the oxygen output end of the oxygen control system; the two inlets of the pipeline mixer are respectively connected with the steam output end of the steam control system and the oxygen output end of the oxygen control system, so that the steam and the oxygen are mixed in the pipeline mixer to form a gasification agent, or only nitrogen passes through the pipeline mixer; and the gasifying agent distribution system is connected with the outlet of the pipeline mixer and is divided into a plurality of paths, so that the distribution of the gasifying agent in different areas of the gasification furnace can be controlled and adjusted. The utility model discloses mainly solved the distributed control problem of prior art gasification agent, realized oxygen, the accurate control of steam flow, different proportion medium homogeneous mixing, gasification agent in the different region evenly distributed, accurate control and the regulation of gasifier, it is easy and simple to handle, there is the significance to coal chemical industry technique.
Description
Technical Field
The invention belongs to the technical field of coal chemical industry, and particularly relates to a distribution control device for a gasification agent of a circulating fluidized bed gasification furnace.
Background
Among large-scale coal gasification technologies, fluidized bed gasification technologies have a plurality of attractive advantages, and the currently industrialized large-scale application of fluidized bed coal gasification technologies mainly comprises a German Wenkeler coal gasification technology, a Luqi circulating fluidized bed coal gasification technology, an American U-Gas gasification furnace, a KRW gasification furnace, a Chinese ICC ash agglomeration fluidized bed coal gasification furnace, a CAGG ash agglomeration coal gasification technology and an Ender furnace powder coal gasification technology, wherein gasification agents of the gasification agents are mixed Gas of oxygen and steam. The mode of the fluidized bed gas inlet agent is generally that the lower part of a coal inlet nozzle or the upper part and the lower part of the coal inlet nozzle are filled with a gasification agent, and the gasification agent can lead rising coal gas to carry fine coal powder and dust to carry out secondary reaction. The local over-temperature in the gasification furnace is easily caused by the local introduction of the gasification agent, a hot spot is formed, slag is adhered to the wall surface of the gasification furnace due to melting and coking, and the research and development of the large-scale gasification furnace are influenced due to the control of an oxygen and steam system.
At present, coal resources are rich in China, clean conversion of coal becomes an important subject at present, the temperature field distribution in the circulating fluidized bed gasification furnace is more uniform, and the local overhigh temperature of the bottom of the gasification furnace is avoided; the gasification furnace is kept in a stable fluidization state, and the stability of the whole gasification system is ensured. The furnace has the characteristics of high gasification efficiency, wide raw material adaptability, small investment and the like, is eminently produced in the coal chemical industry of China, and is favored by medium and small chemical enterprises. The amount of the primary gasification agent of the circulating fluidized bed gasification furnace needs to be kept relatively stable so as to ensure the stable fluidization state in the gasification furnace, and the adjustment of the amount of the gasification agent needs to be carried out according to the material bed differential pressure, the bed temperature and the load condition, so that the operation is difficult, the situations of slagging, furnace shutdown and the like are easy to occur, and the adjustment space is small.
The system device for mixing oxygen and steam into a gasifying agent in the existing transport bed pulverized coal pressurized gasification technology has no pipeline mixer, is simple to mix in a pipeline, has no independent flow regulating valve at the same time, cannot accurately regulate and control the proportion of oxygen and steam in the gasifying agent, cannot timely take accurate operation when the gasification furnace has local high temperature and overtemperature phenomena, cannot implement steam adding and oxygen reducing operations, and loses balance in furnace temperature control, so that the gasification efficiency of the gasification furnace and the effective components of synthetic gas are influenced, a bed layer is unstable, and the condition of fluidization interruption is easy to occur.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a gasification agent distribution control device of a circulating fluidized bed gasification furnace, which realizes the accurate control of oxygen and steam flow, the uniform mixing of media with different proportions, the uniform distribution and accurate control and adjustment of gasification agents in different areas of the gasification furnace, is simple and convenient to operate, can be timely processed when abnormal conditions occur, is easy to accurately adjust, does not influence the temperature change of the gasification furnace and the fluidization stability of the gasification furnace, enables the whole device to tend to be in a stable state, and has important significance for the control and operation of a large fluidized bed.
In order to achieve the purpose, the invention adopts the technical scheme that:
a distribution control device of a gasification agent of a circulating fluidized bed gasification furnace is characterized by comprising:
a steam control system 18 that controls the output of steam;
an oxygen control system 19 for controlling the output of oxygen;
the accident nitrogen protection system 20 controls the output of nitrogen, and the output end of the accident nitrogen protection system is connected with the oxygen output end of the oxygen control system 19;
a pipeline mixer 11, two inlets of which are respectively connected with a steam output end of a steam control system 18 and an oxygen output end of an oxygen control system 19, so that the steam and the oxygen are mixed in the pipeline mixer to form a gasification agent, or only nitrogen passes through the pipeline mixer (by cutting off the output of the steam and the oxygen);
the gasifying agent distribution system 21 is connected with the outlet of the pipeline mixer 11 and is divided into a plurality of paths, so that the distribution of the gasifying agent in different areas of the gasification furnace 17 can be controlled and adjusted.
The steam control system 18 comprises a steam flow meter 1, a steam regulating valve 2 and a steam stop valve 3 which are sequentially arranged on a steam pipeline.
The oxygen control system 19 comprises an oxygen preheater 4, an oxygen flowmeter 5, an oxygen regulating valve 6 and an oxygen shut-off valve 7 which are sequentially arranged on an oxygen pipeline.
The oxygen preheater 4 is a jacketed heat exchanger and comprises a central inner tube and an outer tube, wherein the central inner tube is connected with an oxygen pipeline in series, an oxygen supply medium passes through the central inner tube, the outer tube adopts steam heat exchange, and the temperature of the oxygen subjected to heat exchange is controlled to be above the design requirement by adjusting a steam hand valve, so that the condensate is prevented from being separated out. Wherein the heat exchanged vapor and the vapor of vapor control system 18 may be the same source.
The accident nitrogen protection system 20 comprises a nitrogen flowmeter 8, a nitrogen regulating valve 9 and a nitrogen cut-off valve 10 which are sequentially arranged on a nitrogen pipeline.
The two inlets of the pipeline mixer 11 are respectively a horizontal pipe orifice and a vertical pipe orifice, wherein the horizontal pipe orifice is connected with the oxygen output end of the oxygen control system 19, and the vertical pipe orifice is connected with the steam output end of the steam control system 18.
The gasifying agent distribution system 21 includes three parallel main lines, which are an upper main line, a middle main line and a lower main line, respectively, an inlet of each main line is connected with an outlet of the pipeline mixer 11, and an outlet of each main line is correspondingly connected to an upper region, a middle region and a lower region of the gasifying furnace 17, respectively.
An upper region flowmeter 12 and an upper region regulating valve 13 are arranged on the upper trunk line, a middle region flowmeter 14 and a middle region regulating valve 15 are arranged on the middle trunk line, and a lower region flowmeter 16 is arranged on the lower trunk line.
The outlets of the main lines are connected to the upper, middle and lower regions of the gasification furnace 17 through a plurality of sub-lines, respectively.
Compared with the prior art, the invention has the beneficial effects that:
1) the oxygen and steam control system realizes the accurate control of the oxygen and steam flow.
2) The gasification agent distribution system realizes the uniform distribution of the gasification agent in different areas of the gasification furnace, and the adjustment and control are effective.
3) The pipeline mixer realizes uniform mixing and rapid diffusion of oxygen and steam in different proportions, and the mixing efficiency is as high as 90-95%.
4) Simple operation and easy control.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the figure, 1, a steam flowmeter; 2. a steam regulating valve; 3. a steam cut-off valve; 4. an oxygen preheater; 5. an oxygen flow meter; 6. an oxygen regulating valve; 7. an oxygen shut-off valve; 8. a nitrogen gas flow meter; 9. a nitrogen regulating valve; 10. a nitrogen shut-off valve; 11. a pipeline mixer; 12. an upper zone flow meter; 13. an upper zone regulating valve; 14. a mid-zone flow meter; 15. a middle zone regulating valve; 16. a lower zone flow meter; 17. a gasification furnace; 18. a steam control system; 19. an oxygen control system; 20. an accident nitrogen protection system; 20. gasification agent distribution system.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, a gasification agent distribution control apparatus of a circulating fluidized bed gasification furnace includes:
the steam control system 18 comprises a steam flowmeter 1, a steam regulating valve 2 and a steam stop valve 3 which are sequentially arranged on a steam pipeline and is used for controlling the output of steam;
the oxygen control system 19 comprises an oxygen preheater 4, an oxygen flowmeter 5, an oxygen regulating valve 6 and an oxygen shut-off valve 7 which are sequentially arranged on an oxygen pipeline and is used for controlling the output of oxygen; the oxygen preheater 4 is a jacketed heat exchanger and comprises a central inner pipe and an outer pipe, wherein the central inner pipe is connected with an oxygen pipeline in series and is used for allowing oxygen media to pass through, the outer pipe adopts steam for heat exchange, and the temperature of the oxygen subjected to heat exchange is controlled to be above the design requirement by adjusting a steam valve so as to prevent condensate from being separated out;
the accident nitrogen protection system 20 comprises a nitrogen flowmeter 8, a nitrogen regulating valve 9 and a nitrogen cut-off valve 10 which are sequentially arranged on a nitrogen pipeline and used for controlling the output of nitrogen, and the output end of the nitrogen is connected with the oxygen output end of an oxygen control system 19, so that the accident nitrogen protection system is an adjustment control means in an emergency and plays a role in protection;
the pipeline mixer 11 has two inlets, a horizontal nozzle and a vertical nozzle, the horizontal nozzle is connected with the oxygen output end of the oxygen control system 19, and the vertical nozzle is connected with the steam output end of the steam control system 18. Oxygen and steam are respectively introduced to realize uniform mixing of media with different proportions, and the mixing efficiency is as high as 90-95%.
The gasification agent distribution system 21 comprises three main lines which are connected in parallel, namely an upper main line, a middle main line and a lower main line, wherein the upper main line is provided with an upper region flowmeter 12 and an upper region regulating valve 13, the middle main line is provided with a middle region flowmeter 14 and a middle region regulating valve 15, and the lower main line is provided with a lower region flowmeter 16; the inlet of each main trunk line is connected with the outlet of the pipeline mixer 11, the outlet of the upper main trunk line is connected with the upper area of the gasification furnace 17 through a plurality of sub trunk lines, the outlet of the middle main trunk line is connected with the middle area of the gasification furnace 17 through a plurality of sub trunk lines, and the outlet of the lower main trunk line is connected with the lower area of the gasification furnace 17 through a plurality of sub trunk lines, so that the distribution of the gasification agent in different areas of the gasification furnace 17 can be controlled and adjusted.
Schematic diagram of operation structure of gasification agent distribution system device
Taking coal feeding for a large circulating fluidized bed gasification furnace as an example, the pressure of the gasification furnace of the device is 2.3MPa, the temperature is 900 ℃, and the specific operation steps are as follows:
preheating an oxygen preheater 4, and controlling a heating steam hand valve to carry out heat exchange to ensure that the outlet oxygen is preheated to the temperature of 80-100 ℃ required by the design.
Opening the steam stop valve 3, adjusting the opening of the steam adjusting valve 2 to 8 percent, displaying 80kg/h by the steam flow meter 1, and introducing steam into the pipeline mixer 11;
then the oxygen cut-off valve 7 is opened to adjust the opening of the oxygen regulating valve 6 to 4%, and the oxygen flow meter 5 displays 20Nm3H, introducing oxygen into the line mixer 11;
after oxygen and steam pass through the pipeline mixer 11 and are mixed in different proportions in the system, the flow rates of the oxygen and the steam are adjusted according to the condition of the furnace temperature, and the optimal ratio of the gasification agent, namely steam/oxygen, is found to be 0.9-1.4 (mass/volume).
The gasification agent is mixed and then enters the upper area, the middle area and the lower area of the gasification furnace according to different proportions, the temperature difference of the upper area, the middle area and the lower area of the furnace temperature is observed, the gasification agent is adjusted according to the ratio of 2: 4: 4,3: 6: 1,4: 5: 1,2: 6: 2, and the like, and the distribution control is carried out according to different proportions, so that the temperatures of the upper, middle and lower regions of the gasification furnace are uniform.
The gasifying agent from the line mixer 11 is preferentially introduced into the lower region of the gasification furnace 17, and 40Nm is shown by the lower region flow meter 163H, the opening degree of the upper zone regulating valve 13 is regulated to 3%, and the upper zone flow rate 12 shows 20Nm3H, the opening of the middle zone regulating valve 15 is adjusted to 7%, and the middle zone flow 14 shows 40Nm3H, regulating and controlling the flow of the gasifying agent entering different areas of the gasification furnace 17, regulating the distribution of the gasifying agent according to the temperature of different areas of the gasification furnace 17, and finding out the optimal distributionThe upper part of the proportion: the middle part: lower portion 2: 4: 4.
during the stop process or emergency, the oxygen cut-off valve 7 is cut off, the steam cut-off valve 3 is cut off, the nitrogen cut-off valve 10 is opened, the opening degree of the nitrogen adjusting valve 9 is adjusted to 30%, and the nitrogen displays 300Nm through the nitrogen flowmeter 83And h, continuously adjusting the nitrogen flow according to the working condition, and taking protective control measures.
In conclusion, the oxygen and steam control system realizes the accurate control of the oxygen and steam flow; oxygen and steam are respectively introduced into the inlets of the pipeline mixers, and uniform mixing of media with different proportions is realized in the equipment; the gasification agent distribution system is positioned behind the pipeline mixer, so that the distribution control and adjustment of the gasification agent in different areas of the gasification furnace are realized; the accident nitrogen protection system is positioned in front of the pipeline mixer and behind the oxygen shut-off valve, realizes an adjustment control means under emergency conditions, and plays a role in protection. The distribution control problem of the gasifying agent in the prior art is solved, the accurate control of oxygen and steam flow, the uniform mixing of media with different proportions, the uniform distribution of the gasifying agent in different areas of the gasification furnace, the accurate control and adjustment are realized, the operation is simple and convenient, and the distribution control device has important significance on the coal chemical industry technology.
Claims (9)
1. A distribution control device of a gasification agent of a circulating fluidized bed gasification furnace is characterized by comprising:
a steam control system (18) that controls the output of steam;
an oxygen control system (19) that controls the output of oxygen;
the accident nitrogen protection system (20) controls the output of nitrogen, and the output end of the accident nitrogen protection system is connected with the oxygen output end of the oxygen control system (19);
the two inlets of the pipeline mixer (11) are respectively connected with the steam output end of the steam control system (18) and the oxygen output end of the oxygen control system (19) to realize the mixing of the steam and the oxygen in the pipeline mixer to form a gasification agent or only allow nitrogen to pass through;
and the gasifying agent distribution system (21) is connected with an outlet of the pipeline mixer (11) and is divided into a plurality of paths, so that the distribution of the gasifying agent in different areas of the gasification furnace (17) can be controlled and adjusted.
2. The distribution control device of the gasification agent of the circulating fluidized bed gasification furnace according to claim 1, wherein the steam control system (18) comprises a steam flow meter (1), a steam regulating valve (2) and a steam shut-off valve (3) which are sequentially arranged on a steam pipeline.
3. The distribution control device of the gasification agent of the circulating fluidized bed gasification furnace according to claim 1, wherein the oxygen control system (19) comprises an oxygen preheater (4), an oxygen flow meter (5), an oxygen regulating valve (6) and an oxygen shut-off valve (7) which are sequentially arranged on an oxygen pipeline.
4. The distribution control device of the gasification agent of the circulating fluidized bed gasification furnace according to claim 3, wherein the oxygen preheater (4) is a jacketed heat exchanger, and comprises a central inner tube and an outer tube, the central inner tube is connected with an oxygen pipeline in series, an oxygen supply medium passes through the central inner tube, and the outer tube adopts steam for heat exchange.
5. The circulating fluidized bed gasifier gasifying agent distribution control device according to claim 1, wherein the accident nitrogen protection system (20) comprises a nitrogen gas flowmeter (8), a nitrogen gas regulating valve (9) and a nitrogen gas shut-off valve (10) which are sequentially arranged on a nitrogen gas pipeline.
6. The gasification agent distribution control device of the circulating fluidized bed gasification furnace according to claim 1, wherein the two inlets of the pipeline mixer (11) are a horizontal pipe orifice and a vertical pipe orifice respectively, wherein the horizontal pipe orifice is connected with the oxygen output end of the oxygen control system (19), and the vertical pipe orifice is connected with the steam output end of the steam control system (18).
7. The gasification agent distribution control device of a circulating fluidized bed gasification furnace according to claim 1, wherein the gasification agent distribution system (21) comprises three main lines connected in parallel, namely an upper main line, a middle main line and a lower main line, wherein the inlet of each main line is connected with the outlet of the pipeline mixer (11), and the outlet of each main line is correspondingly connected into the upper region, the middle region and the lower region of the gasification furnace (17).
8. The gasification agent distribution control apparatus of a circulating fluidized bed gasification furnace according to claim 7, wherein the upper trunk line is provided with an upper region flow meter (12) and an upper region regulating valve (13), the middle trunk line is provided with a middle region flow meter (14) and a middle region regulating valve (15), and the lower trunk line is provided with a lower region flow meter (16).
9. The circulating fluidized bed gasification furnace gasifying agent distribution control apparatus according to claim 7 or 8, wherein the outlets of the main lines are connected to the upper, middle and lower regions of the gasification furnace (17) through a plurality of sub-lines, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922184892.6U CN211057041U (en) | 2019-12-09 | 2019-12-09 | Gasification agent distribution control device of circulating fluidized bed gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922184892.6U CN211057041U (en) | 2019-12-09 | 2019-12-09 | Gasification agent distribution control device of circulating fluidized bed gasification furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211057041U true CN211057041U (en) | 2020-07-21 |
Family
ID=71593934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922184892.6U Active CN211057041U (en) | 2019-12-09 | 2019-12-09 | Gasification agent distribution control device of circulating fluidized bed gasification furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211057041U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831353A (en) * | 2021-01-09 | 2021-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Gasification efficiency adjusting system of gasification furnace and working method thereof |
| CN113667515A (en) * | 2021-07-30 | 2021-11-19 | 西安航天源动力工程有限公司 | Gasification agent supply system, gasification agent supply control method and coal gasification system |
-
2019
- 2019-12-09 CN CN201922184892.6U patent/CN211057041U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831353A (en) * | 2021-01-09 | 2021-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Gasification efficiency adjusting system of gasification furnace and working method thereof |
| CN112831353B (en) * | 2021-01-09 | 2022-03-04 | 中国华能集团清洁能源技术研究院有限公司 | Gasification efficiency adjusting system of gasification furnace and working method thereof |
| CN113667515A (en) * | 2021-07-30 | 2021-11-19 | 西安航天源动力工程有限公司 | Gasification agent supply system, gasification agent supply control method and coal gasification system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211057041U (en) | Gasification agent distribution control device of circulating fluidized bed gasification furnace | |
| CN102816581B (en) | Vertical tube moving bed continuous pyrolysis apparatus for biomass | |
| CN104277881B (en) | Dry-process deslagging fluidized bed gasification reaction device | |
| CN101629108B (en) | Method for preparing coal gas through gasification of pulverized coal | |
| JPH028603A (en) | Burner for partial combustion having spiral flow cooling surface | |
| CN208898501U (en) | For producing the burner of synthesis gas | |
| CN101531454B (en) | A mineral wool boiling melting method of directly using grainy waste slag and coal | |
| CA2008920A1 (en) | Preparation of synthesis gas by partial oxidation | |
| CN102977928A (en) | Pulverized coal combined circulating fluidized bed hierarchical pyrolytic gasifier | |
| CN102520736A (en) | Load control method of coal nozzles of dry pulverized coal gasification furnace | |
| DE3220546C2 (en) | ||
| CN204455026U (en) | Combined type circulating fluidized-bed gasification reaction unit | |
| CN207193218U (en) | A kind of biomass char vaporizing system for synthesis gas system | |
| CN111500319B (en) | Preheating type gasification device and preheating type gasification method | |
| CN103553041B (en) | Gas generator for carbon monoxide and method for preparing carbon monoxide by using gas generator | |
| CN109575994B (en) | Coal and gaseous hydrocarbon coupling gasification method for adjusting hydrogen-carbon ratio of synthesis gas | |
| CN112111303A (en) | Coal gasification system with overhead burner and gasification process | |
| CN210340794U (en) | Pressurized moving bed self-control gasification CO production device | |
| CN113025382A (en) | Radiation waste pot, gasification furnace comprising same and gasification method | |
| CN220265631U (en) | Powder coke blending and burning equipment of pulverized coal gasification furnace | |
| CN220443778U (en) | Graded powder supply cold hydrogenation reactor | |
| CN206318951U (en) | The system that a kind of hydrogasification coupling calcium carbide is smelted | |
| CN221166465U (en) | Gas transmission system of carbonization chamber of carbonization furnace | |
| CN112029542B (en) | Hydro-gasification system and method | |
| CN204848773U (en) | Coal catalytic gasification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |