CN108913217B - Air supply system and air supply method of gasification furnace - Google Patents
Air supply system and air supply method of gasification furnace Download PDFInfo
- Publication number
- CN108913217B CN108913217B CN201810946344.XA CN201810946344A CN108913217B CN 108913217 B CN108913217 B CN 108913217B CN 201810946344 A CN201810946344 A CN 201810946344A CN 108913217 B CN108913217 B CN 108913217B
- Authority
- CN
- China
- Prior art keywords
- gas supply
- storage container
- gas
- valve
- intermittent
- 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
- 238000002309 gasification Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 207
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 165
- 238000003860 storage Methods 0.000 claims abstract description 125
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 82
- 238000010926 purge Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 102
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 8
- 239000002283 diesel fuel Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000009191 jumping Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/14—Production of inert gas mixtures; Use of inert gases in general
-
- 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
-
- 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
- C10J2300/093—Coal
Abstract
The invention discloses a gas supply system and a gas supply method of a gasification furnace, and belongs to the technical field of coal gasification. The system is used for supplying gas to a plurality of gasifiers, and the system comprises: the nitrogen generating device is used for providing high-pressure nitrogen for the intermittent air supply air storage container and the continuous air supply air storage container; the continuous gas supply and storage container is used for supplying gas for a continuous gas utilization structure in the gasification furnace; the intermittent gas supply and storage container is used for supplying gas to an intermittent gas utilization structure in the gasification furnace; the continuous gas supply and storage container can supply gas for the intermittent gas supply and storage container; and the gas supply pipeline is used as a passage for nitrogen to flow. The system separates the continuous gas utilization structure from the intermittent gas utilization structure in the production process, so that the large user consumption of the gasification furnace in the starting process is ensured, the small user consumption of the gasification furnace in the normal operation process is ensured, and the safe purging consumption of a plurality of gasification furnaces in the accident shutdown process is also considered.
Description
Technical Field
The invention belongs to the field of medium gasification, and particularly relates to an air supply system and an air supply method of a gasification furnace.
Background
The gasification technology is used as a 'tap' technology of modern coal chemical industry, the stable and optimized operation of the technology has a critical influence on ensuring the 'safe, stable, long, full and excellent' production of coal chemical engineering. The coal gasification process technology is divided into: the fixed bed gasification technology, the fluidized bed gasification technology and the entrained flow gasification technology are three major types, and all the gasification technologies have different technologies, so that 100 coal gasification technologies are sequentially arranged in the world at present, and no matter which coal gasification technology is separated from a high-pressure nitrogen system. However, the high-pressure nitrogen used in the gasification system is only used in the original practice, and people do not take excessive consideration in this aspect along with the development of the coal gasification technology, which affects the stable operation of the whole gasification system to a certain extent.
Specifically, three ¢ 2800/¢ 3200 type III HT-L space gasifier are configured in a coal gasification workshop of the company, the system pressure is 4.0MPa (G), and the temperature is 1400 ℃. Gasification furnace systemThe system comprises four units of pulverizing and conveying, gasifying and washing, slag and water treatment and public works. Three gasifiers consume 100t/h of coal and the effective gas quantity of the dry basis is 15 ten thousand Nm 3 /h。
Referring to fig. 1, a gas supply system of a conventional gasifier comprises a nitrogen generating device, a gas storage container, a pressure regulating structure and the like, wherein the gas storage container acquires and stores high-pressure nitrogen output by the nitrogen generating device, and the high-pressure nitrogen is reduced in pressure by the pressure regulating structure and then is sent to a gas consuming structure. Specifically, the nitrogen generating device outputs nitrogen with the pressure of 8.1MPa to the gas storage container, and the volume of the gas storage container is 102m 3 The top of the gas storage container is provided with a safety valve for emptying, the bottom of the gas storage container is provided with a blow-down valve for blow-down, the output end of the gas storage container is output by a four-way pressure regulating pipeline which is connected in parallel and is provided with a pressure regulating valve, the four-way pressure regulating pipelines are combined and then are connected with an input main pipe of a gas utilization structure, and the input main pipe of the gas utilization structure is provided with an emptying valve and outputs three routes of gas to three gasification furnaces. The above structure is only suitable for the air supply when the gasification furnaces are less, and when the quantity of the gasification furnaces is more than or equal to 3, taking 3 gasification furnaces as an example, the following problems can occur in the existing air supply structure:
(1) In very special cases, i.e. three gasifiers jump over simultaneously, insufficient gas supply may occur when a large amount of high-pressure nitrogen is used by the gasifier system;
(2) When a certain gasifier suddenly jumps to use a large amount of nitrogen, the other two running gasifiers may suddenly reduce the chain jump due to the high-pressure nitrogen pressure. The loss of the gasification furnace is up to about 50-100 ten thousand when the gasification furnace jumps once, and if casualties or equipment damage occurs, the loss is larger.
Disclosure of Invention
In order to solve the problems, the embodiment of the invention provides a gas supply system and a gas supply method of a gasifier, wherein the system separately supplies gas to a continuous gas utilization structure and an intermittent gas utilization structure in the production process, so that the large user consumption of the gasifier in starting is ensured, the small user consumption of the gasifier in normal operation is ensured, and the safe purging consumption of a plurality of gasifiers in accident shutdown is also considered. The technical scheme is as follows:
in one aspect, an embodiment of the present invention provides an air supply system of a gasification furnace for supplying air to a plurality of gasification furnaces, including:
a nitrogen generating device 3 for supplying high-pressure nitrogen to the intermittent air supply air container 2 and the continuous air supply air container 1;
a continuous gas supply and storage container 1 for supplying gas to a continuous gas utilization structure in the gasification furnace;
a intermittent gas supply and storage container 2 for supplying gas to an intermittent gas supply structure in the gasification furnace;
the continuous gas supply and storage container 1 can supply gas for the intermittent gas supply and storage container 2;
and the gas supply pipeline is used as a passage for nitrogen to flow.
Wherein the volume of the intermittent air supply and storage container 2 is 110-135m when the device is used for 3 gasifiers 3 The volume of the continuous gas supply and storage container 1 is 20-35m 3 。
The nitrogen generating device 3 is respectively output to the continuous air supply air storage container 1 and the intermittent air supply air storage container 2 through two paths of air supply pipelines, a first check valve 4 is arranged on the air supply pipeline of the output end of the nitrogen generating device 3, a third stop valve 10 is arranged on the air supply pipeline of the input end of the continuous air supply air storage container 1, a second check valve 20 and a fourth stop valve 21 are arranged on the air supply pipeline of the input end of the intermittent air supply air storage container 2, and the continuous air supply air storage container 1 can supply air for the intermittent air supply air storage container 2 through opening and closing the third stop valve 10 and the fourth stop valve 21.
Further, the air supply system provided by the embodiment of the invention further comprises: the first pressure regulating structure is used for reducing the pressure of the nitrogen output by the continuous gas supply and storage container 1 to a first preset value and then supplying gas for the continuous gas utilization structure; the second pressure regulating structure is used for reducing the pressure of the nitrogen output by the intermittent gas supply and storage container 2 to a second preset value and then supplying gas for the intermittent gas utilization structure; the first pressure regulating structure is formed by arranging two pressure regulating pipelines in parallel, wherein the pipe diameters of the two pressure regulating pipelines are different, and a first pressure regulating valve 15 and a second pressure regulating valve 16 are respectively arranged on the two pressure regulating pipelines; the second voltage regulating structure is formed by arranging two paths of voltage regulating structures in parallelThe pressure pipelines are formed, the pipe diameters of the two pressure regulating pipelines are different, and a third pressure regulating valve 26 and a fourth pressure regulating valve 27 are respectively arranged on the two pressure regulating pipelines; when the pressure regulating valve on the large-diameter pressure regulating pipeline is fully opened, the maximum flow is more than 1000Nm 3 /h; when the pressure regulating valve on the small-diameter pressure regulating pipeline is fully opened, the maximum flow is more than 100Nm 3 /h。
Preferably, the continuous gas supply and storage container 1 and the intermittent gas supply and storage container 2 in the embodiment of the present invention are provided with a first double interlock safety valve 12 and a second double interlock safety valve 22, respectively.
Preferably, the air supply pipeline of the output end of the continuous air supply air storage container 1 in the embodiment of the invention is provided with a first cut-off valve 13 and a first shower guide valve 14, and the air supply pipeline of the output end of the intermittent air supply air storage container 2 is provided with a second cut-off valve 24 and a second shower guide valve 25.
Preferably, the input main pipe of the continuous gas utilization structure in the embodiment of the invention is provided with a first safety valve 17, a third one-way valve 18 and a vent valve 19, and the input main pipe of the intermittent gas utilization structure is provided with a second safety valve 28, a fourth one-way valve 29 and an overpressure automatic vent valve 210.
The continuous gas utilization structure in this embodiment includes: the device comprises a gasification furnace annular cavity inflation pressure equalizing and heat insulating structure, a nozzle cooling water tank pressurizing structure, a steam drum-to-water wall water vapor system leakage test structure before starting, a diesel oil atomizing and pipeline purging structure for a starting nozzle, an ignition nozzle and starting nozzle oxygen pipeline purging structure, and a starting oxygen pipeline leakage test structure;
the intermittent gas-using structure in this embodiment includes: oxygen pipeline sweeps structure when gasifier start-up, shut down and jump the car.
The intermittent gas supply and storage container 2 at least ensures sufficient purging supply when the gasifiers are all in a skip, the gas supply pressure is more than 5.1MPa, the alarm is given when the pressure is reduced to 4.8MPa, the gasifiers are in a skip in a chain when the pressure is reduced to 4.4MPa, and the average output flow is 500-650Nm 3 And can be 500-650Nm 3 The gas supply was continued for at least 120min at a flow rate/h.
Wherein, the continuous gas supply and storage capacity in the embodiment of the inventionThe device 1 at least ensures that when one gasification furnace is started, other gasification furnaces are supplied fully during normal operation, the gas supply pressure is more than 5.1MPa, and the average output flow is 1000-1100Nm 3 And can be between 1000 and 1100Nm 3 The gas supply was continued for at least 75min at a rate of/h.
In another aspect, the present invention provides a method of supplying gas to a gasification furnace, the method comprising: the continuous gas supply and storage container 1 acquires and stores nitrogen output by the nitrogen generating device 3, and after depressurization, the continuous gas supply structure supplies gas; the intermittent gas supply and storage container 2 acquires and stores nitrogen output by the nitrogen generating device 3, and supplies gas for the intermittent gas utilization structure after depressurization; when the nitrogen generating device 3 skips to stop outputting nitrogen, the continuous gas supply gas storage container 1 can supplement nitrogen for the intermittent gas supply gas storage container 2.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: according to the gasification furnace gas supply system provided by the embodiment of the invention, two high-pressure nitrogen storage tanks are designed according to the dosage, and the maneuverability is improved compared with one high-pressure nitrogen storage tank. In very special cases, namely when three gasifiers jump over simultaneously, when the system uses high-pressure nitrogen in a large amount, the continuous use storage tanks can be supplemented for the intermittent use storage tanks. Compared with a high-pressure nitrogen tank, when a certain gasification furnace suddenly jumps to use a large amount of nitrogen, the other two gasification furnaces running do not cause the sudden drop of the pressure of the high-pressure nitrogen to jump, because the two gasification furnaces respectively use different high-pressure tanks.
Drawings
FIG. 1 is a schematic block diagram of an air supply system of a conventional gasification furnace;
fig. 2 is a schematic block diagram of an air supply system of a gasification furnace according to an embodiment of the present invention.
In the figure: 1 a continuous gas supply and storage container, 2 an intermittent gas supply and storage container, 3 a nitrogen generating device and 4 a first one-way valve;
the valve comprises a third shut-off valve 10, a first blow-off valve 11, a first double-interlocking safety valve 12, a first shut-off valve 13, a first shower guiding valve 14, a first pressure regulating valve 15, a second pressure regulating valve 16, a first safety valve 17, a third check valve 18 and a vent valve 19;
the second check valve 20, the fourth shut-off valve 21, the second double-interlocking safety valve 22, the second blowdown valve 23, the second shut-off valve 24, the second shower guide valve 25, the third pressure regulating valve 26, the fourth pressure regulating valve 27, the second safety valve 28, the fourth check valve 29 and the 210 overpressure automatic emptying valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Example 1
Referring to fig. 2, embodiment 1 provides a gas supply system of a gasification furnace for supplying gas to a plurality of gasification furnaces, in particular, a media powder pressurized gasification furnace, comprising:
a nitrogen generating device 3 for supplying high-pressure nitrogen to the intermittent air supply air container 2 and the continuous air supply air container 1; it includes an air separation structure, a gas-liquid separation structure, a filter, etc., which outputs high-pressure nitrogen gas, such as 8.1MPa.
A continuous gas supply and storage container 1 for supplying gas to a continuous gas utilization structure in the gasification furnace; and the intermittent air supply and storage container 2 is used for supplying air to the intermittent air utilization structure in the gasification furnace. The continuous gas supply and storage container 1 and the intermittent gas supply and storage container 2 can be conventional nitrogen storage tanks, and the two nitrogen storage tanks are large and small according to the usage amount. The large gasification furnace is used as a blowing and sweeping device (only intermittent air supply is needed) in driving, normal parking, accident parking and the like, and the small gasification furnace is used as a gasification furnace in normal operation (continuous air supply is needed). The continuous gas utilization structure and the intermittent gas utilization structure are separated in the production process, so that the large user consumption of the gasification furnace in the starting process is ensured, the small user consumption of the gasification furnace in the normal operation process is ensured, and the safe purging consumption of a plurality of gasification furnaces in the accident shutdown process is also considered.
Wherein the continuous gas supply and storage container 1 can supply gas for the intermittent gas supply and storage container 2; specifically, when the gas supply of the intermittent gas supply container 2 is insufficient during the full-system jump (the gas supply of the nitrogen generating device 3 is interrupted), the gas in the continuous gas supply container 1 may also enter the intermittent gas supply container 2 to be replenished.
And the air supply pipeline is used as a nitrogen flow channel, and is provided with a one-way valve, an emptying valve, a safety valve and the like according to requirements.
Wherein the volume of the intermittent air supply and storage container 2 is 110-135m when the device is used for 3 gasifiers 3 (to ensure the air supply amount when 3 gasifiers jump completely), the volume of the continuous air supply air storage container 1 is 20-35m 3 . Specifically, the volume of the intermittent air supply and storage container 2 is 1.4-1.6 times (about 1.2-1.3 times of the theoretical volume value of each air utilization structure) of the theoretical volume value calculated by the maximum air utilization amount of the intermittent air utilization structure, and the volume of the continuous air supply and storage container 1 is 1/5-1/4 of the volume of the intermittent air supply and storage container. The embodiment of the invention increases the volume based on the theoretical volume value, and has sufficient air supply amount and supply time meeting the requirements when dealing with emergency. As in the conventional gas supply system (a nitrogen storage tank), the volume of the gas storage tank is 102m 3 Instead, the present embodiment increases the total volume in which the intermittent air supply and storage container 2 has a volume of 127m 3 The volume of the continuous gas supply and storage container 1 is 28 m 3 。
Referring to fig. 2, the nitrogen generating device 3 provided in the embodiment of the present invention outputs the nitrogen to the input end of the continuous air supply air storage container 1 and the input end of the intermittent air supply air storage container 2 through two air supply pipelines, the air supply pipeline of the output end of the nitrogen generating device 3 is provided with a first check valve 4, the air supply pipeline of the input end of the continuous air supply air storage container 1 is provided with a third check valve 10, the air supply pipeline of the input end of the intermittent air supply air storage container 2 is provided with a second check valve 20 and a fourth check valve 21 in sequence, and the continuous air supply air storage container 1 can supply air for the intermittent air supply air storage container 2 by opening and closing the third check valve 10 (normally open) and the fourth check valve 21 (normally open) in sequence.
Further, referring to fig. 2, the air supply system provided in the embodiment of the present invention further includes: the first pressure regulating structure is used for reducing the pressure of the nitrogen output by the continuous gas supply and storage container 1 to a first preset value (such as 5.1 MPa) and then supplying gas for the continuous gas utilization structure; and the second pressure regulating structure is used for reducing the pressure of the nitrogen output by the intermittent gas supply and storage container 2 to a second preset value (such as 5.1 MPa) and then supplying gas for the intermittent gas supply structure. A first predetermined valueAnd the second predetermined value is designed according to actual requirements. The first pressure regulating structure is composed of two pressure regulating pipelines which are arranged in parallel, the pipe diameters of the two pressure regulating pipelines are different, and a first pressure regulating valve 15 (which can be arranged on a small pipe diameter pressure regulating pipeline in particular) and a second pressure regulating valve 16 (which can be arranged on a large pipe diameter pressure regulating pipeline in particular) are respectively arranged on the two pressure regulating pipelines. The second pressure regulating structure is composed of two pressure regulating pipelines which are arranged in parallel, the pipe diameters of the two pressure regulating pipelines are different, and a third pressure regulating valve 26 (which can be arranged on a small pipe diameter pressure regulating pipeline in particular) and a fourth pressure regulating valve 27 (which can be arranged on a large pipe diameter pressure regulating pipeline in particular) are respectively arranged on the two pressure regulating pipelines. Wherein, when the pressure regulating valve (the second pressure regulating valve 16 and the fourth pressure regulating valve 27) on the pressure regulating pipeline with large pipe diameter is fully opened, the maximum flow rate of the pressure regulating pipeline is more than 1000Nm 3 /h (relative to 3 gasifiers); when the pressure regulating valves (the first pressure regulating valve 15 and the third pressure regulating valve 26) on the small-diameter pressure regulating pipeline are fully opened, the maximum flow rate of the pressure regulating pipeline is more than 100Nm 3 /h (relative to 3 gasifiers). The valve opening of each pressure regulating valve is required to be 0-100% completed within 2 seconds. The air supply pipelines at the output ends of the two high-pressure nitrogen tanks are designed to be connected with two regulating valves in parallel, one pipe is large in pipe diameter, the other pipe is small in pipe diameter, and the two pipes are controlled in a branched way, so that the regulating range is widened, and the precise control can be realized; and when one of the regulating valves fails, the on-line maintenance can be realized.
Preferably, referring to fig. 2, the continuous gas supply storage container 1 and the intermittent gas supply storage container 2 in the embodiment of the present invention are provided with a first double interlock safety valve 12 and a second double interlock safety valve 22, respectively, on top thereof. The double-interlocking safety valves are arranged at the tops of the two high-pressure nitrogen tanks (no matter how the valves are operated, one safety valve is in a working state), and hidden danger caused by the safety valves is avoided, so that the safety valves can be ensured to be in a safe state all the time. The first double-interlocking safety valve 12 and the second double-interlocking safety valve 22 are composed of two linked safety valves, specifically, the two safety valves are arranged corresponding to one inlet and two outlets of the French liquefied air group, and the gears on the valve rods of the front hand valves of the two safety valves are connected by chains, so that one hand valve hand wheel is rotated, the other hand valve moves reversely, namely, the effect that one valve is opened and the other hand valve is closed, and one valve is kept opened all the time is achieved.
Preferably, referring to fig. 2, a first cut-off valve 13 and a first shower guide valve 14 are sequentially arranged on an air supply pipeline (before the first pressure regulating structure) at the output end of the continuous air supply air storage container 1 in the embodiment of the present invention, and a second cut-off valve 24 and a second shower guide valve 25 are sequentially arranged on an air supply pipeline (before the second pressure regulating structure) at the output end of the intermittent air supply air storage container 2. When the overhauling needs to disassemble and examine the regulating valve, the disconnecting valve and the shower guiding valve are designed at the outlet of the high-pressure nitrogen tank, so that the gas in the high-pressure nitrogen tank does not need to be discharged, and unnecessary waste is caused.
Preferably, referring to fig. 2, a first safety valve 17, a third one-way valve 18 and a vent valve 19 are arranged on an input manifold (output by a first pressure regulating structure) of the continuous gas utilization structure in the embodiment of the invention, and the first safety valve 17, the third one-way valve 18 and the vent valve 19 are sequentially arranged; the input main pipe (output by the second pressure regulating structure) of the intermittent air utilization structure is provided with a second safety valve 28, a fourth one-way valve 29 and an overpressure automatic emptying valve 210, and the second safety valve 28, the fourth one-way valve 29 and the overpressure automatic emptying valve 210 are sequentially arranged. The first safety valve 17 and the second safety valve 28 are the first measures when the overpressure is reached, the safety valves are active when the manual intervention is not enough or no false actual overpressure is found or indicated by the pressure; the blow-off valve 19 and the overpressure automatic blow-off valve 210 are arranged on site and can be manually controlled by a person, and are the second measure. An overpressure automatic emptying valve 210 is arranged at the user end of the high-pressure nitrogen tank outlet, and when the valve is closed suddenly when a large amount of air is used by the intermittent air-using structure for a set time, the safety valve can be prevented from jumping out due to pressure holding of the high-pressure nitrogen tank outlet pipeline. The third check valve 18 and the fourth check valve 29 are arranged on the user pipeline to prevent the danger of the backward channeling of the industrial gas at the user side caused by the low pressure of the storage tank.
The continuous gas utilization structure in this embodiment includes: the device comprises a gasification furnace annular cavity inflation pressure equalizing and heat insulating structure, a burner cooling water tank pressurizing structure, a steam drum-to-water wall water vapor system leakage test structure before driving, a diesel oil atomizing and (diesel oil) pipeline purging structure for a start-up burner, an ignition burner, a start-up burner oxygen pipeline purging structure, a start-up oxygen pipeline leakage test structure and the like.
The intermittent gas-using structure in this embodiment includes: oxygen pipeline purging structure during driving, stopping and jumping of the gasification furnace, etc.
The intermittent air supply and storage container 2 at least ensures sufficient purging supply when the gasifiers are all in a skip, the air supply pressure is more than 5.1MPa, and the alarm is given when the pressure is reduced to 4.8MPa, and a plurality of gasifiers are in a skip in a chain manner when the pressure is reduced to 4.4 MPa. The average output flow rate of the intermittent air supply and storage container 2 is 500-650Nm 3 /h (e.g. 578 Nm) 3 /h) and can be in the range of 500-650Nm 3 /h (e.g. 578 Nm) 3 And/h) continuously supplying gas for at least 120min (relative to 3 gasifiers) at the flow rate.
The continuous gas supply and storage container 1 in the embodiment of the invention at least ensures that the supply is sufficient when one gasification furnace is started and other gasification furnaces normally operate, and the gas supply pressure is more than 5.1MPa. The average output flow of the intermittent air supply and storage container 2 is 1000-1100Nm 3 /h (as 1044 Nm) 3 /h) and can be in the range of 1000-1100Nm 3 /h (as 1044 Nm) 3 And/h) continuously supplying air for at least 75min (relative to 3 gasifiers) at the flow rate.
According to the gasification furnace gas supply system provided by the embodiment of the invention, two high-pressure nitrogen storage tanks are designed according to the dosage, and the maneuverability is improved compared with one high-pressure nitrogen storage tank. In very special cases, namely when three gasifiers jump over simultaneously, when the system uses high-pressure nitrogen in a large amount, the continuous use storage tanks can be supplemented for the intermittent use storage tanks. Compared with a high-pressure nitrogen tank, when a certain gasification furnace suddenly jumps to use a large amount of nitrogen, the other two gasification furnaces running do not cause the sudden drop of the pressure of the high-pressure nitrogen to jump, because the two gasification furnaces respectively use different high-pressure tanks.
Example 2
Referring to fig. 2, embodiment 2 provides a gas supply system of a gasification furnace for supplying gas to 3 media powder pressurized gasification furnaces, comprising a nitrogen generating device 3, a first check valve 4, a continuous gas supply and storage container 1, a intermittent gas supply and storage container 2, a third shut-off valve 10, a first blow-off valve 11, a first double-interlock safety valve 12, a firstThe shut-off valve 13, the first pilot valve 14, the first pressure regulating valve 15, the second pressure regulating valve 16, the first relief valve 17, the third check valve 18, the vent valve 19, the second check valve 20, the fourth shut-off valve 21, the second blowdown valve 23, the second double-interlock relief valve 22, the second shut-off valve 24, the second pilot valve 25, the third pressure regulating valve 26, the fourth pressure regulating valve 27, the second relief valve 28, the fourth check valve 29, the overpressure automatic vent valve 210, and the like. Wherein the volume of the intermittent air supply and storage container 2 is 127m 3 The volume of the continuous gas supply and storage container 1 is 28 m 3 . Most of the valves are controlled by a central control, the vent valve 19 and the overpressure automatic vent valve 210 are arranged close to the gasification furnace, the vent valve 19 can be controlled manually on site, and the overpressure automatic vent valve 210 is controlled by the central control.
The nitrogen generating device 3 is connected with the inlet of the first one-way valve 4 through a gas supply pipeline, the outlet of the first one-way valve 4 is output in two paths, one path is connected with the inlet of the third cut-off valve 10 through the gas supply pipeline, and the other path is connected with the inlet of the second one-way valve 20 through the gas supply pipeline; the outlet of the third shut-off valve 10 is connected with the input end of the continuous gas supply gas storage container 1 through a gas supply pipeline, and the outlet of the second check valve 20, the fourth shut-off valve 21 and the input end of the intermittent gas supply gas storage container 2 are sequentially connected through a gas supply pipeline.
The top of the continuous gas supply and storage container 1 is provided with a first double-interlocking safety valve 12, the bottom of the continuous gas supply and storage container is provided with a first blow-off valve 11, the output end of the continuous gas supply and storage container is sequentially connected with a first cut-off valve 13 and a first shower guide valve 14 through gas supply pipelines and then is output by two parallel pressure regulating pipelines, one pressure regulating pipeline adopts DN25 standard, and a first pressure regulating valve 15 is arranged on the pressure regulating pipeline; the other pressure regulating pipeline adopts DN50 standard, and a second pressure regulating valve 16 is arranged on the other pressure regulating pipeline. The air supply pipeline (the input main pipe of the continuous air structure) combined by the two pressure regulating pipelines is sequentially provided with a first safety valve 17, a third one-way valve 18 and an emptying valve 19, and is finally connected with three gasifiers (the continuous air structure) through three branch pipes respectively.
The top of the intermittent air supply and storage container 2 is provided with a second double-interlock safety valve 22, the bottom of the intermittent air supply and storage container is provided with a second blow-off valve 23, the output end of the intermittent air supply and storage container is sequentially connected with a second cut-off valve 24 and a second shower guide valve 25 through an air supply pipeline and then is output by two parallel pressure regulating pipelines, one pressure regulating pipeline adopts DN25 specification, and a third pressure regulating valve 26 is arranged on the pressure regulating pipeline; the other pressure regulating pipeline adopts DN40 specification, and a fourth pressure regulating valve 27 is arranged on the other pressure regulating pipeline. The air supply pipeline (the input main pipe of the intermittent air structure) combined by the two pressure regulating pipelines is sequentially provided with a second safety valve 28, a fourth one-way valve 29 and an overpressure automatic emptying valve 210, and is finally connected with three gasifiers (the intermittent air structure) through three branch pipes respectively.
Example 3
Referring to fig. 2, embodiment 3 provides a method for supplying gas to a gasification furnace, which adopts the system provided in embodiment 1 or 2, and specifically includes:
the continuous gas supply and storage container 1 acquires and stores the nitrogen output by the nitrogen generating device 3, and after depressurization (a first preset value, such as 5.1 MPa), the continuous gas supply structure supplies gas;
the intermittent gas supply and storage container 2 acquires and stores the nitrogen output by the nitrogen generating device 3, and after depressurization (a second preset value, such as 5.1 MPa), the intermittent gas supply structure supplies gas;
when the nitrogen generation apparatus 3 stops outputting nitrogen while the intermittent supply gas container 2 is not sufficiently supplied, the continuous supply gas container 1 may supplement the intermittent supply gas container 2 with nitrogen (by adjusting the third cut-off valve 10 and the fourth cut-off valve 21).
Specifically, the volume of the intermittent air supply and storage container 2 is 1.4-1.6 times (about 1.2-1.3 times of the theoretical volume value of each air utilization structure) of the theoretical volume value calculated by the maximum air utilization amount of the intermittent air utilization structure, and the volume of the continuous air supply and storage container 1 is 1/5-1/4 of the volume of the intermittent air supply and storage container.
The continuous gas utilization structure in this embodiment includes: the device comprises a gasification furnace annular cavity inflation pressure equalizing and heat insulating structure, a burner cooling water tank pressurizing structure, a steam drum-to-water wall water vapor system leakage test structure before driving, a diesel oil atomizing and (diesel oil) pipeline purging structure for a start-up burner, an ignition burner, a start-up burner oxygen pipeline purging structure, a start-up oxygen pipeline leakage test structure and the like.
The intermittent gas-using structure in this embodiment includes: oxygen pipeline purging structure during driving, stopping and jumping of the gasification furnace, etc.
The "first", "second", "third" and "fourth" in the present invention are only used for distinguishing, and have no other special meaning.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A gas supply system for a gasifier, the system for supplying gas to a plurality of gasifiers, comprising:
the nitrogen generating device (3) is used for providing high-pressure nitrogen for the intermittent air supply air storage container (2) and the continuous air supply air storage container (1);
a continuous gas supply and storage container (1) for supplying gas to a continuous gas utilization structure in the gasification furnace;
the intermittent air supply and storage container (2) is used for supplying air to an intermittent air utilization structure in the gasification furnace;
the continuous gas supply and storage container (1) can supply gas for the intermittent gas supply and storage container (2);
and the gas supply pipeline is used as a passage for nitrogen to flow.
2. The gas supply system of a gasification furnace according to claim 1,
when the intermittent air supply and storage container (2) is used for 3 gasifiers, the volume of the intermittent air supply and storage container (2) is 110-135m 3 The volume of the continuous gas supply and storage container (1) is 20-35m 3 。
3. The gas supply system of the gasification furnace according to claim 1, wherein the nitrogen generating device (3) outputs to the continuous gas supply gas storage container (1) and the intermittent gas supply gas storage container (2) through two gas supply pipelines respectively, a first check valve (4) is arranged on a gas supply pipeline of an output end of the nitrogen generating device (3), a third cut-off valve (10) is arranged on a gas supply pipeline of an input end of the continuous gas supply gas storage container (1), a second check valve (20) and a fourth cut-off valve (21) are arranged on a gas supply pipeline of an input end of the intermittent gas supply gas storage container (2), and the continuous gas supply gas storage container (1) can supply gas for the intermittent gas supply gas storage container (2) through opening and closing and adjusting the third cut-off valve (10) and the fourth cut-off valve (21).
4. The gas supply system of a gasifier of claim 1, wherein said system further comprises:
the first pressure regulating structure is used for reducing the pressure of the nitrogen output by the continuous gas supply and storage container (1) to a first preset value and then supplying gas for the continuous gas utilization structure;
the second pressure regulating structure is used for reducing the pressure of the nitrogen output by the intermittent gas supply and storage container (2) to a second preset value and then supplying gas for the intermittent gas supply structure;
the first pressure regulating structure is formed by arranging two pressure regulating pipelines in parallel, wherein the pipe diameters of the two pressure regulating pipelines are different, and a first pressure regulating valve (15) and a second pressure regulating valve (16) are respectively arranged on the two pressure regulating pipelines;
the second pressure regulating structure is formed by arranging two pressure regulating pipelines in parallel, wherein the pipe diameters of the two pressure regulating pipelines are different, and a third pressure regulating valve (26) and a fourth pressure regulating valve (27) are respectively arranged on the two pressure regulating pipelines;
when the pressure regulating valve on the large-diameter pressure regulating pipeline is fully opened, the maximum flow is more than 1000Nm 3 /h；
When the pressure regulating valve on the small-diameter pressure regulating pipeline is fully opened, the maximum flow is more than 100Nm 3 /h。
5. The gas supply system of a gasification furnace according to claim 1, wherein the continuous gas supply and gas storage container (1) and the intermittent gas supply and gas storage container (2) are respectively provided with a first double-interlock safety valve (12) and a second double-interlock safety valve (22).
6. The gas supply system of the gasifier according to claim 1, wherein a first cut-off valve (13) and a first shower guide valve (14) are arranged on a gas supply pipeline of the output end of the continuous gas supply gas storage container (1), and a second cut-off valve (24) and a second shower guide valve (25) are arranged on a gas supply pipeline of the output end of the intermittent gas supply gas storage container (2).
7. The gas supply system of the gasification furnace according to claim 1, wherein the input main pipe of the continuous gas utilization structure is provided with a first safety valve (17), a third one-way valve (18) and a discharge valve (19), and the input main pipe of the intermittent gas utilization structure is provided with a second safety valve (28), a fourth one-way valve (29) and an overpressure automatic discharge valve (210).
8. The gas supply system of a gasification furnace according to claim 1,
the continuous gas utilization structure comprises:
the gasification furnace annular cavity is provided with an inflatable pressure equalizing and heat insulating structure,
a pressurizing structure of a nozzle cooling water tank,
the front steam drum is opened to a water-cooling wall steam system leak test structure,
a diesel oil atomizing and pipeline blowing structure for a start-up burner,
an ignition burner and a startup burner oxygen pipeline purging structure,
a starting oxygen pipeline leakage test structure;
the intermittent air utilization structure comprises:
oxygen pipeline sweeps structure when gasifier start-up, shut down and jump the car.
9. The gas supply system of a gasification furnace according to claim 8 wherein,
the intermittent air supply and storage container (2) at least ensures sufficient purging and supply when the gasifiers are all in a skip, the air supply pressure is more than 5.1MPa, the alarm is given when the pressure is reduced to 4.8MPa, and a plurality of gasifiers are in a skip chain when the pressure is reduced to 4.4 MPa;
the continuous gas supply and storage container (1) at least ensures that when one gasification furnace is started, other gasification furnaces are supplied sufficiently during normal operation, and the gas supply pressure is more than 5.1MPa.
10. A method of supplying gas to a gasifier, the method comprising:
the continuous gas supply and storage container (1) acquires and stores nitrogen output by the nitrogen generating device (3), and after depressurization, the continuous gas supply structure supplies gas;
the intermittent gas supply and storage container (2) acquires and stores nitrogen output by the nitrogen generating device (3), and supplies gas for the intermittent gas utilization structure after depressurization;
when the nitrogen generating device (3) stops outputting nitrogen when the vehicle jumps, the continuous gas supply and storage container (1) can supplement nitrogen for the intermittent gas supply and storage container (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946344.XA CN108913217B (en) | 2018-08-20 | 2018-08-20 | Air supply system and air supply method of gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946344.XA CN108913217B (en) | 2018-08-20 | 2018-08-20 | Air supply system and air supply method of gasification furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108913217A CN108913217A (en) | 2018-11-30 |
| CN108913217B true CN108913217B (en) | 2024-02-06 |
Family
ID=64406373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810946344.XA Active CN108913217B (en) | 2018-08-20 | 2018-08-20 | Air supply system and air supply method of gasification furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108913217B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109729884A (en) * | 2019-03-04 | 2019-05-10 | 西藏自治区农牧科学院农业资源与环境研究所 | A kind of highland barley simulation gas tank |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588984A (en) * | 1995-07-18 | 1996-12-31 | Verini; Nicholas A. | Apparatus and method to intermittently manufacture and dispense nitrogen |
| FR2791809A1 (en) * | 1999-04-01 | 2000-10-06 | Air Liquide | Unit for treatment of articles, especially silicon wafers, stored in containers includes treatment gas supply device with pressure regulator, and continuous container purging device for gas flow rate control |
| CN203836610U (en) * | 2014-04-24 | 2014-09-17 | 陕西陕煤黄陵矿业有限公司 | Nitrogen out-conveying pipeline |
| CN204224646U (en) * | 2014-11-07 | 2015-03-25 | 山西太钢不锈钢股份有限公司 | The annealing furnace nitrogen airing system improved |
| CN205979750U (en) * | 2016-08-10 | 2017-02-22 | 义马煤业综能新能源有限责任公司 | U gas gasifier flying dust is combustion system again |
| CN208791584U (en) * | 2018-08-20 | 2019-04-26 | 湖北云华安化工有限公司 | A kind of air supply system of gasification furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7658229B2 (en) * | 2006-03-31 | 2010-02-09 | BST Lift Systems, LLC | Gas lift chamber purge and vent valve and pump systems |
-
2018
- 2018-08-20 CN CN201810946344.XA patent/CN108913217B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588984A (en) * | 1995-07-18 | 1996-12-31 | Verini; Nicholas A. | Apparatus and method to intermittently manufacture and dispense nitrogen |
| FR2791809A1 (en) * | 1999-04-01 | 2000-10-06 | Air Liquide | Unit for treatment of articles, especially silicon wafers, stored in containers includes treatment gas supply device with pressure regulator, and continuous container purging device for gas flow rate control |
| CN203836610U (en) * | 2014-04-24 | 2014-09-17 | 陕西陕煤黄陵矿业有限公司 | Nitrogen out-conveying pipeline |
| CN204224646U (en) * | 2014-11-07 | 2015-03-25 | 山西太钢不锈钢股份有限公司 | The annealing furnace nitrogen airing system improved |
| CN205979750U (en) * | 2016-08-10 | 2017-02-22 | 义马煤业综能新能源有限责任公司 | U gas gasifier flying dust is combustion system again |
| CN208791584U (en) * | 2018-08-20 | 2019-04-26 | 湖北云华安化工有限公司 | A kind of air supply system of gasification furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108913217A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201180903Y (en) | High-security automatic liquefied chlorine vaporization system | |
| CN106838605B (en) | A kind of process and device for LNG receiving stations BOG systems | |
| CN103195586B (en) | Method for monitoring separation of fluid in gas turbine and fuel system | |
| CN108913217B (en) | Air supply system and air supply method of gasification furnace | |
| CN106870945B (en) | Natural gas pressure regulating skid-mounted device with multistage safety protection function | |
| CN204358193U (en) | A kind of leading gas safety relief valve | |
| CN104329567B (en) | Pressure relief system for long-distance pipeline | |
| CN103407567B (en) | The integrated power control unit of liquefied natural gas (LNG) power ship | |
| CN107559105A (en) | Ship and its double air supply systems | |
| CN110752045B (en) | Purging system and method for volume control box of nuclear power station | |
| CN203657209U (en) | Automatic water replenishing system for boiler | |
| CN211311385U (en) | Arene adsorption system after transformation | |
| CN203395584U (en) | Nitrogen purging system for large medium-low calorific value synthesis-gas gas turbine for integrated gasification combined cycle (IGCC) power station | |
| CN104763998B (en) | The split type steam raising plant of waste heat two-stage reclaiming type | |
| CN105013295B (en) | A kind of emergent treatment system and emergency processing method of fluorine carbon alkane process units | |
| CN208791584U (en) | A kind of air supply system of gasification furnace | |
| CN210769551U (en) | Cooling water supply system for cracked gas compressor | |
| CN209415019U (en) | A kind of nuclear power station hydrogen booster system | |
| CN202165796U (en) | Rapid nitrogen blowing device of oxygen spherical tank | |
| CN106520211A (en) | High-temperature fuel gas rapid cut-off and pressure relief protection device and biomass gasifying furnace | |
| CN101058016B (en) | Fire-extinguishing system capable of continuously preparing carbon dioxide and its method for preparing carbon dioxide | |
| CN207452035U (en) | A kind of broken coal gasification improves the device of the ash lock cycle of operation | |
| CN217356916U (en) | Offshore oil and gas field torch gas pressurization recovery system | |
| CN220287142U (en) | Gas phase pressure relief system from liquefied hydrocarbon filling station to torch recovery device | |
| CN105505472B (en) | A kind of new gasification furnace coal slurry flow control methods |
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 |