CN215162420U - Pulverized coal gasification system using high-temperature transformation condensate as gasifying agent - Google Patents
Pulverized coal gasification system using high-temperature transformation condensate as gasifying agent Download PDFInfo
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Abstract
The utility model provides an use fine coal gasification system of high temperature transform condensate as gasifying agent, based on this fine coal gasification system, can cancel oxygen and vapor mixing arrangement etc. can enough simplify the flow, reduce the equipment investment, can reduce the gasification running cost again. The pulverized coal gasification system comprises a gasification furnace, an ignition burner and a plurality of process burners, wherein a burner base is fixedly arranged at the top of a furnace body of the gasification furnace, the ignition burner is arranged at the center of the burner base, and the process burners are arranged on the burner base in a surrounding manner; the bottoms of the ignition burner and the process burner are provided with bottom outlets corresponding to the gasification chamber of the gasification furnace; the process burner comprises a burner body, and further comprises a central oxygen channel, a coal powder channel and a high-temperature transformation condensate channel, wherein the central oxygen channel, the coal powder channel and the high-temperature transformation condensate channel extend to the bottom outlet of the burner body along the axial direction of the burner body.
Description
Technical Field
The utility model relates to a fine coal gasification technical field, in particular to use fine coal gasification system of high temperature transformation lime set as gasifying agent
Background
The dry pulverized coal entrained flow pressurized gasification technology is widely used by domestic coal chemical industry plants due to the advantages of the dry pulverized coal entrained flow pressurized gasification technology in gasification efficiency. The technology is that raw coal is ground and dried to prepare small-particle coal powder, the small-particle coal powder is conveyed to a gasification furnace through pneumatic dense phase to be subjected to gasification reaction with oxygen, the conversion rate of coal can reach more than 99%, the effective gas content is 87-93%, the cold gas efficiency is 79-83%, the oxygen consumption and the coal consumption of a unit product are low, but in gasification, a certain amount of water vapor is required to be added as a gasification agent to participate in the reaction in order to achieve the heat balance and the temperature balance in the gasification furnace, and especially for the raw coal with high carbon content and high heat value, the amount of steam added in the gasification process is higher. The pressure of the pulverized coal gasification is generally about 4.0MPaG, and the water vapor is added by mixing 5.0-5.5 MPaG saturated steam after being superheated (about 300 ℃) with oxygen and then entering a burner in the form of mixed gas (in order to prevent the water vapor from condensing and damaging equipment, the oxygen also needs to be heated to more than 160 ℃). However, common chemical enterprises do not have medium-pressure steam of 5.0MPaG grade (a power plant is not allowed to be built by themselves), the source of superheated steam is difficult, high-pressure steam is required to be obtained through temperature reduction and pressure reduction, the process is complicated, and the investment is increased. In addition, oxygen is a high-risk gas, water vapor and oxygen need to be absolutely clean when mixed, and small amount of impurities can cause safety accidents such as blasting and the like. In addition, requirements such as sealing, material selection and the like of equipment, pipelines and instruments of an oxygen system are improved due to the influence of the temperature of the steam and the oxygen, the investment cost and the maintenance cost of the device are correspondingly improved, and particularly, nickel-based materials with high alloy and extremely low carbon content are required to be adopted for equipment from an oxygen preheating channel to a burner, a pipeline and a pipeline; the material cost is very high, the processing is difficult, and great burden is brought to the device on the cost and the construction period. In addition, the cost of each ton of high-pressure steam is about 100 yuan, and the gasification operation cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
To the shortcoming and the drawback of above-mentioned gasification principle and current gasification system, the utility model discloses develop an use fine coal gasification system of high temperature transformation lime set as gasifying agent, based on this fine coal gasification system, can cancel oxygen and vapor mixing arrangement etc. can enough simplify the flow, reduce the equipment investment, can reduce the gasification running cost again.
The utility model discloses a reach its purpose, provide following technical scheme:
a pulverized coal gasification system using high-temperature transformation condensate as a gasification agent comprises a gasification furnace, an ignition burner and a plurality of process burners, wherein a burner base is fixedly arranged at the top of a furnace body of the gasification furnace, the ignition burner is arranged at the center of the burner base, and the process burners are arranged on the burner base around the ignition burner; the bottoms of the ignition burner and the process burner are provided with bottom outlets corresponding to the gasification chamber of the gasification furnace;
the process burner comprises a burner body, a central oxygen channel, a coal powder channel and a high-temperature transformation condensate channel, wherein the central oxygen channel, the coal powder channel and the high-temperature transformation condensate channel extend to the bottom outlet of the burner body along the axial direction of the burner body; the inlet of the high-temperature transformation condensate passage comprises a first connection state connected with a high-temperature transformation condensate conveying pipeline and a second connection state connected with an inert gas conveying pipeline, and the high-temperature transformation condensate conveying pipeline is provided with a high-temperature transformation condensate flow regulating valve and a high-temperature transformation condensate flow meter.
And the high-temperature transformation condensate flow controller is used for regulating and controlling the opening degree of the high-temperature transformation condensate flow regulating valve and is in communication connection with the high-temperature transformation condensate flow meter.
Furthermore, an ejector capable of enabling the high-temperature transformation condensate in the high-temperature transformation condensate passage to be atomized and ejected from a bottom outlet of the process burner is arranged at the lower part of the high-temperature transformation condensate passage; or the lower part of the high-temperature transformation condensate passage is provided with a high-temperature transformation condensate cyclone which can enable the high-temperature transformation condensate in the high-temperature transformation condensate passage to be sprayed out from the bottom outlet of the process burner.
Furthermore, a coal powder swirler which can enable coal powder in the coal powder channel to be sprayed out from an outlet at the bottom of the process burner is arranged at the lower part of the coal powder channel.
Furthermore, an oxygen swirler which can enable oxygen in the central oxygen passage to be sprayed out from an outlet at the bottom of the process burner is arranged at the lower part of the central oxygen passage.
Further, an oxygen inlet of the central oxygen passage and an oxygen inlet of the ignition burner are respectively connected with an oxygen conveying pipeline, and the oxygen conveying pipeline is made of stainless steel.
Further, the number of the process burners is 3.
Further, the inert gas conveying pipeline is a conveying pipeline for conveying nitrogen or carbon dioxide.
Furthermore, an inlet which is arranged on the high-temperature transformation condensate passage and is connected with a high-temperature transformation condensate conveying pipeline and an inlet which is arranged on the high-temperature transformation condensate passage and is connected with an inert gas conveying pipeline are shared inlets.
Furthermore, the inner diameters of the central oxygen channel, the coal powder channel and the high-temperature transformation condensate channel, which are close to the bottom of the process burner, are gradually narrowed from top to bottom.
The utility model provides a technical scheme has following beneficial effect:
the utility model provides a fine coal gasification system sets up high temperature transform lime set passageway on the technology nozzle, and this high temperature transform lime set passageway ground is imported including two kinds of connection states, and one of them connection state is with high temperature transform lime set pipeline connection to can let in high temperature transform lime set. And the high-temperature transformation condensate enters the high-temperature transformation condensate channel and is finally sprayed into a gasification chamber of the gasification furnace from the bottom of the channel to participate in gasification reaction. The high-temperature shift condensate comes from high-temperature condensate generated in a synthesis gas shift section, the high-temperature shift condensate is often reused as a washing liquid of a washing tower in the prior art, and the inventor finds that the high-temperature shift condensate has the characteristics of high temperature and high pressure (for example, the temperature is about 152 ℃ and the pressure is about 5.0 MPa), and is suitable for being used as a gasifying agent. Based on the utility model discloses a fine coal gasification system directly changes in the lime set input high temperature transformation lime set passageway through high temperature transformation lime set pipeline to it need add special oxygen heating device, oxygen steam mixing arrangement, steam decompression and filter equipment etc. not enough when having avoided traditional use steam to be the gasifying agent, therefore based on the fine coal gasification system can simplify fine coal gasification flow, reduces equipment, reduces the material requirement of corresponding oxygen system equipment and pipeline, thereby very big reduction engineering construction expense, improved the security (oxygen temperature reduction) of device.
For dry powder gasification, in order to ensure the stability of pulverized coal transportation, the water content in the pulverized coal needs to be controlled within a certain range, but when the gasification furnace is operated, a certain amount of water vapor is often added into the gasification furnace to maintain the temperature and heat balance inside the gasification furnace. However, based on the utility model discloses a fine coal gasification system carries out fine coal gasification, can introduce high temperature transform lime set to need not to introduce steam, reduce running cost on the basis that satisfies former technological requirement.
Based on the utility model discloses a fine coal gasification system carries out fine coal gasification, can use high temperature transformation lime set to replace vapor as the gasifying agent, can simplify fine coal gasification flow, realizes the dual purpose that reduces investment cost and running cost.
Drawings
FIG. 1 is a schematic view of a coal gasification system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a process burner according to an embodiment of the present invention;
fig. 3 is a schematic view of an internal structure of a process burner according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the contents of the present invention are further described below with reference to the following embodiments, but the contents of the present invention are not limited to the following embodiments.
Referring to fig. 1, the present invention provides a pulverized coal gasification system using a high temperature shift condensate as a gasifying agent. The pulverized coal gasification system mainly comprises a gasification furnace 1, an ignition burner 3 and a plurality of process burners 4. The gasifier 1 and the ignition burner 3 may specifically adopt conventional structures well known to those skilled in the art, and will not be described in detail. Specifically, as well known to those skilled in the art, the gasification furnace 1 includes a furnace body 26, a gasification chamber 10 and a quench chamber 12 located below the gasification chamber 10 are disposed in the furnace body 26, a water wall 11 is disposed on the periphery of the gasification chamber 10, and a slag discharge opening 27 is disposed between the gasification chamber 10 and the quench chamber 12. A burner base 2 is fixedly arranged on the top of the furnace body 26 of the gasification furnace 10. An ignition burner 3 and a plurality of process burners 4 are arranged on the burner base 2. Wherein ignition burner 3 sets up in the center department of nozzle seat 2, and a plurality of process burner 4 are arranged around ignition burner 3. The number of process burners 4 is for example 2, 3 or more, i.e. n in fig. 1 represents a plurality of process burners, which may be 2, 3 or more process burners. Bottom outlets corresponding to the gasification chamber 10 of the gasification furnace 1 are arranged at the bottoms of the ignition burner 3 and the process burner 4, so that materials in the ignition burner 3 and the process burner 4 can enter the gasification chamber 10 to be subjected to gasification reaction.
In the present invention, referring to fig. 1 to 3, the process burner 4 used therein specifically includes a burner body 18. The burner body 18 is provided with a central oxygen passage 28, a pulverized coal passage 19, a high-temperature shift condensate passage 20 and a cooling water passage 21. These passages each extend in the axial direction of the burner body 18. The central oxygen passage 28, the pulverized coal passage 19 and the high-temperature shift condensate passage 20 extend to the bottom outlet 25 of the burner body along the axial direction of the burner body 18. The cooling water channel 21 is used for introducing cooling water for cooling the process burner 4. The central oxygen passage 28 is arranged at the central position of the burner body 18, and the pulverized coal passage 19 and the high-temperature transformation condensate passage 20 are arranged between the central oxygen passage 28 and the cooling water passage 21 in sequence from inside to outside. Specifically, from inside to outside, the central oxygen passage 28, the pulverized coal passage 19, the high-temperature shift condensate passage 20 and the cooling water passage 21 are sequentially sleeved. Wherein the cooling water passage 21 is provided with a cooling water inlet 16 and a cooling water outlet 17. The top of the central oxygen channel 28 is provided with an oxygen inlet 13, the oxygen inlet 13 is connected with the oxygen delivery pipeline 9, and the bottom of the central oxygen channel 28 is an oxygen outlet; the upper part of the coal powder channel 19 is provided with a coal powder inlet 14, the coal powder inlet 14 is connected with a coal powder conveying pipeline 25, and the bottom of the coal powder channel 19 is provided with a coal powder outlet; the upper part of the high-temperature transformation condensate passage 20 is provided with a high-temperature transformation condensate inlet 15, and the bottom of the high-temperature transformation condensate passage 20 is provided with a high-temperature transformation condensate outlet. The inlet 15 of the high temperature shift condensate passage 20 includes two connection states, a first connection state connected to the high temperature shift condensate transfer line 5 and a second connection state connected to an inert gas transfer line (not shown). In the operation process of the pulverized coal gasification system, according to the gasification process requirements of different links, the inlet 15 of the high-temperature transformation condensate passage 20 can be connected with the inert gas conveying pipeline so as to be convenient for introducing inert gas (such as nitrogen or carbon dioxide) for positive pressure protection, and when the high-temperature transformation condensate is required to be introduced for use as a gasifying agent, the inlet 15 of the high-temperature transformation condensate passage 20 can be connected with the high-temperature transformation condensate conveying pipeline 5 so as to be convenient for introducing the high-temperature transformation condensate.
Be equipped with high temperature transform condensate flow control valve 6 and high temperature transform condensate flowmeter 7 on high temperature transform condensate conveying line 5, through the aperture regulation of high temperature transform condensate flow control valve 6, adjust the high temperature transform condensate flow in the high temperature transform condensate conveying line 5, high temperature transform condensate flowmeter 7 is used for detecting the high temperature transform condensate flow in the high temperature transform condensate conveying line 5. Preferably, a high-temperature transformation condensate flow controller for regulating and controlling the opening degree of the high-temperature transformation condensate flow regulating valve 6 is further arranged, the high-temperature transformation condensate flow controller is in communication connection with the high-temperature transformation condensate flow meter 7, specifically, the high-temperature transformation condensate flow controller receives the flow value of the high-temperature transformation condensate flow meter 7 and compares the flow value with a preset flow value, and the opening degree of the high-temperature transformation condensate flow regulating valve 6 is regulated according to a comparison result, so that the high-temperature transformation condensate in the high-temperature transformation condensate conveying pipeline 5 is introduced into the high-temperature transformation condensate passage 20 at a preset flow rate. For the setting of the preset flow value, a person skilled in the art can set the preset flow value according to the actual production needs and production conditions (such as the operation load of the gasification furnace, the operation temperature, the coal quality condition, etc.).
Preferably, an injector 22 is disposed at the lower part of the high-temperature shift condensate passage 20, so that the high-temperature shift condensate in the high-temperature shift condensate passage 20 can be atomized and injected from a bottom outlet 25 of the process burner 4 to enter the gasification furnace 1. The injector 22 may specifically adopt an injection device or structure existing in the field directly on the basis of satisfying the function of atomizing injection. Alternatively, a high-temperature shift condensate cyclone (not shown) may be provided at a lower portion of the high-temperature shift condensate passage 20, and the high-temperature shift condensate in the high-temperature shift condensate passage 20 may be ejected from the bottom outlet 25 of the process burner 4 and introduced into the gasification furnace 1 by providing the cyclone. The cyclone can directly adopt the structure form existing in the field. The high-temperature transformation condensate is injected into the gasification furnace in a liquid drop mode, so that the vaporization (evaporation) speed can be increased, and the gasification reaction speed of the high-temperature transformation condensate with coal dust, oxygen and synthesis gas in a central flame area is increased.
Preferably, a coal dust cyclone 23 is provided at the lower part of the coal dust channel 19, so that the coal dust in the coal dust channel 19 can be sprayed out from the bottom outlet 25 of the process burner 4. An oxygen swirler 24 may also be provided at the lower part of the central oxygen passage 28 to enable the oxygen in the central oxygen passage 28 to be ejected from the bottom outlet 25 of the process burner 4. Through setting up the swirler, be favorable to improving the material and mix the effect. The above-mentioned cyclones are preferably arranged at a position close to the bottom outlet of the process burner, i.e. close to the burner head of the process burner. The cyclone can directly adopt the structure form existing in the field.
More specifically, the inner diameters of the central oxygen channel 28, the pulverized coal channel 19 and the high-temperature shift condensate channel 20 of the process burner 4 near the bottom of the process burner 4 are all in a trend of gradually narrowing from top to bottom, that is, the inner walls of the channel sections of the channels near the bottom of the process burner 4 are gradually inclined from top to bottom and lean against the central axis of the process burner 4.
Further, the oxygen delivery line 9 connected to the oxygen inlet 13 of the central oxygen passage 28 of the process burner 4 and the oxygen delivery line 9 connected to the oxygen inlet of the ignition burner 3 may be made of stainless steel, without nickel alloy.
By way of example, the operation of the pulverized coal gasification system of the present invention is described below:
in the gasification chamber 10 of the gasification furnace 1, oxygen, coal powder and high-temperature transformation condensate react to be converted into synthesis gas, and the synthesis gas is cooled by a chilling chamber 12 and then is sent to a downstream device as a gasification product. The gasification temperature is 1400-1700 ℃, and the gasification pressure is 2.0-4.5 MPaG.
When ignition is started, oxygen and fuel gas are respectively introduced into an ignition channel of an ignition burner 3 arranged in the center of the top of the gasification furnace 1 through an oxygen inlet and a fuel gas inlet arranged on the ignition burner 3, specifically, the fuel gas is input into the ignition burner 3 through a fuel gas conveying pipeline 8, and the oxygen is input into the ignition burner 3 through an oxygen conveying pipeline 9; after ignition, the ignition state is judged by a flame detector, and the flow of oxygen and fuel gas is increased after ignition to improve the temperature in the gasification furnace, thereby creating conditions for the input of pulverized coal, oxygen and high-temperature transformation condensate. Inert gas purging interfaces are arranged on pipelines before oxygen and fuel gas enter the ignition burner 3 and are used for purging before starting and after stopping and sealing during switching or operation faults so as to prevent high-temperature synthesis gas from being tempered.
After ignition is successful and the flow rates of oxygen and fuel gas meet the specified requirements, coal powder and oxygen are simultaneously put into the gasification furnace 1, the coal powder is fed in a conventional dense phase conveying mode, and the coal powder enters the process burner 4 and the gasification furnace 1 through dense phase conveying of inert gases such as carbon dioxide or nitrogen. And nitrogen purging interfaces are arranged on pipelines before the pulverized coal and the oxygen enter the process burner 4 and are used for sealing before starting and after stopping purging and during operation faults so as to prevent the high-temperature synthesis gas from being tempered.
After the pulverized coal and the oxygen of the process burner 4 are fed, before the high-temperature transformation condensate is fed, the inlet 15 of the high-temperature transformation condensate passage 20 is connected with an inert gas conveying pipeline, the inert gas is introduced for positive pressure sealing protection, the process burner is stable in operation (which is well known to a person skilled in the art and is judged according to the speed and the density of the pulverized coal, the pressure of a gasification furnace, the outlet temperature of the synthesis gas, the composition stability of the synthesis gas and the like), the generated synthesis gas is conveyed to a transformation working section, the inlet of the high-temperature transformation condensate passage 20 is switched to be connected with the high-temperature transformation condensate conveying pipeline 5, so that the high-temperature transformation condensate is fed, and the high-temperature transformation condensate is injected into the gasification furnace 1 in the form of liquid drops from the bottom outlet 25 of the process burner 4 after the high-temperature transformation condensate is fed.
The working processes of the pulverized coal gasification system and the pulverized coal gasification system of the present invention are not specifically described herein, and can be understood or known by those skilled in the art according to their knowledge of the common general knowledge or the conventional technical knowledge in the art, and thus will not be described in detail.
Adopt the utility model provides a fine coal gasification system carries out fine coal gasification, can regard as the gasifying agent with the high temperature transformation lime set to replace traditional vapor as the mode of gasifying agent. Therefore, an oxygen heating device, a steam pressure reducing device, a filtering device and an oxygen and steam mixing device can be omitted, the high-temperature transformation condensate is directly fed, the flow is simplified, the equipment is reduced, and the material requirements of corresponding oxygen system equipment and pipelines are lowered. The utility model discloses the oxygen conveying pipeline who relates to in can not adopt nickel alloy and adopt the stainless steel to very big reduction the engineering construction expense, improved the security (oxygen temperature reduces) of device. Furthermore, the utility model discloses a process burner spouts the structure for overhead multichannel down, mixes in the stove with back mix effectually, and flow field and temperature field distribution are even in the stove, and high temperature transform lime set can guarantee its higher treatment effect under higher gasification efficiency and lower raw and other materials consumption through the high temperature flame center that injector or swirler directly jetted the vaporizer with the form of fast-speed small liquid drop. Further, for dry powder gasification, in order to ensure the stability of pulverized coal transportation, the water content in the pulverized coal is usually required to be controlled within a certain range, but when the gasification furnace operates, a certain amount of water vapor is required to be added into the gasification furnace to maintain the balance of the temperature and heat inside the gasification furnace; however, based on the utility model discloses a fine coal gasification system can introduce high temperature transform lime set to avoid the introduction of steam, reduced the running cost on the basis that satisfies former technological requirement.
The application of the pulverized coal gasification system of the present invention will be described below by way of a specific example, but it should be noted that the present invention is only exemplary and not meant to be limited thereto.
Coal chemical industry plants produce various chemicals by using coal as a raw material, the coal quality data is shown in table 1, and raw coal is gasified to produce synthesis gas for synthesizing other chemicals at downstream.
Gasification equipment adopts many above-mentioned in the factory the utility model provides a fine coal gasification system (or called fine coal gasification equipment) to the fine coal gasification equipment of 1500 tons grades of single coal input volume is taken as an example, adopts overhead 3+1 nozzle, 1 ignition nozzle and 3 technology nozzles promptly, after igniteing, start-up, the high temperature transform condensate passage of technology nozzle lets in high temperature transform condensate (about temperature 152 ℃, pressure about 5.0 MPa), gasification temperature is 1500 ℃, gasification pressure is 4.0 MPaG. The coal input of each process burner is 17t/h, the oxygen is 9100Nm/h, the high-temperature transformation condensate input is 1.5t/h, and synthesis gas (dry basis) is produced to 90000 Nm/h3The effective gas content is 92vol percent, and the carbon conversion rate is 99 percent.
Compare in traditional fine coal gasification equipment who adds superheated steam as gasification agent, the utility model discloses cancelled oxygen heating device, steam decompression and filter equipment, oxygen steam mixing arrangement, corresponding oxygen pipeline's material also descends to the stainless steel from nickel base alloy, and single set of system can sparingly invest in ~ 200 ten thousand yuan, reduces steam and uses ~ 4.5t/h, and retrieval and utilization high temperature changes lime set ~ 4.5t/h, practices thrift steam expense ~ 540 yuan/h, and the annual saving running cost 432 ten thousand yuan.
Table 1: raw coal data sheet
It will be appreciated by those skilled in the art that certain modifications or adaptations to the invention may be made in light of the teaching of this specification. Such modifications or adaptations are intended to be within the scope of the present invention as defined by the claims.
Claims (10)
1. A pulverized coal gasification system using high-temperature transformation condensate as a gasifying agent is characterized by comprising a gasification furnace, an ignition burner and a plurality of process burners, wherein a burner base is fixedly arranged at the top of a furnace body of the gasification furnace, the ignition burner is arranged at the center of the burner base, and the process burners are arranged on the burner base in a manner of surrounding the ignition burner; the bottoms of the ignition burner and the process burner are provided with bottom outlets corresponding to the gasification chamber of the gasification furnace;
the process burner comprises a burner body, a central oxygen channel, a coal powder channel and a high-temperature transformation condensate channel, wherein the central oxygen channel, the coal powder channel and the high-temperature transformation condensate channel extend to the bottom outlet of the burner body along the axial direction of the burner body; the inlet of the high-temperature transformation condensate passage comprises a first connection state connected with a high-temperature transformation condensate conveying pipeline and a second connection state connected with an inert gas conveying pipeline, and the high-temperature transformation condensate conveying pipeline is provided with a high-temperature transformation condensate flow regulating valve and a high-temperature transformation condensate flow meter.
2. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to claim 1, further comprising a high-temperature shift condensate flow controller for regulating an opening degree of the high-temperature shift condensate flow regulating valve, the high-temperature shift condensate flow controller being in communication connection with the high-temperature shift condensate flow meter.
3. The pulverized coal gasification system using the high-temperature shift condensate as the gasifying agent according to claim 1, wherein an injector enabling the high-temperature shift condensate in the high-temperature shift condensate passage to be atomized and ejected from a bottom outlet of the process burner is arranged at the lower part of the high-temperature shift condensate passage; or the lower part of the high-temperature transformation condensate passage is provided with a high-temperature transformation condensate cyclone which can enable the high-temperature transformation condensate in the high-temperature transformation condensate passage to be sprayed out from the bottom outlet of the process burner.
4. The pulverized coal gasification system using the high-temperature shift condensate as the gasifying agent according to any one of claims 1 to 3, wherein a pulverized coal swirler enabling pulverized coal in the pulverized coal passage to be ejected from a bottom outlet of the process burner is provided at a lower portion of the pulverized coal passage.
5. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to any one of claims 1 to 3, wherein an oxygen cyclone is provided in a lower portion of the central oxygen passage so that oxygen in the central oxygen passage is ejected from a bottom outlet of the process burner.
6. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to any one of claims 1 to 3, wherein an oxygen inlet of the central oxygen passage and an oxygen inlet of the ignition burner are respectively connected to an oxygen delivery line, and the oxygen delivery line is made of stainless steel.
7. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to any one of claims 1 to 3, wherein the number of the process burners is 3.
8. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to any one of claims 1 to 3, wherein the inert gas conveying line is a conveying line for conveying nitrogen gas or carbon dioxide gas.
9. The pulverized coal gasification system using a high-temperature shift condensate as a gasifying agent according to any one of claims 1 to 3, wherein an inlet for connection to a high-temperature shift condensate transfer line and an inlet for connection to an inert gas transfer line provided in the high-temperature shift condensate passage are common inlets.
10. The pulverized coal gasification system using the high-temperature shift condensate as the gasifying agent according to any one of claims 1 to 3, wherein inner diameters of the central oxygen channel, the pulverized coal channel and the high-temperature shift condensate channel at the channel part close to the bottom of the process burner are gradually narrowed from top to bottom.
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