Efficient heat recovery biomass dry powder pressurized entrained-flow bed gasification furnace

Abstract

The utility model discloses an efficient heat recovery biomass dry powder pressurized entrained-flow bed gasification furnace which comprises an upper section gasification furnace gasification chamber and a lower section gasification furnace slag gas treatment chamber, a burner is arranged at the top of the gasification furnace gasification chamber, and the bottom of the gasification furnace gasification chamber is communicated with the gasification furnace slag gas treatment chamber; the gasifier slag gas treatment chamber comprises a radiation waste boiler at the middle-upper section and a slag water bath section at the lower part; high-temperature synthesis gas in a gasification chamber of the gasification furnace enters the radiation waste heat boiler, is sequentially subjected to purging and chilling gas cooling and then is subjected to cyclone separation to obtain synthesis gas and furnace slag, the separated synthesis gas is discharged and enters a subsequent process, the furnace slag is discharged through a slag discharging opening in the bottom of the furnace slag water bath section, and black water in the water bath section is discharged through a chilling black water outlet in the side wall of the furnace slag water bath section. The entrained-flow bed gasifier disclosed by the utility model has the advantages that the gasification efficiency is high, the synthesis gas does not contain tar and methane, efficient heat recovery can be realized, alkali metal contamination can be prevented, dry ash removal system equipment is simple and efficient, and better economic benefits can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-efficiency heat recovery's biomass dry powder pressurized entrained-flow bed gasification furnace, it is mainly applied to biomass gasification preparation synthetic gas, can realize biomass gasification, synthetic gas high-efficiency heat recovery, alkali metal contamination resistance, gasification furnace inside high-efficiency dust removal and other functions, belong to biomass resource utilization technical field. BACKGROUND

[0002] Green methanol and green hydrogen are currently the most suitable scale production and cost advantage technical route, which is the absolute mainstream technical route for the development of green methanol. Biomass gasification technology as a key common technology for green methanol, there is no mature and efficient biomass gasification technology for large-scale application at present. The advantages and disadvantages of biomass gasification technology are the main technical bottleneck restricting the development of green methanol industry.

[0003] At present, in order to meet the needs of chemical production, the research and application of biomass gasification technology is developing from atmospheric gasification technology to pressurized gasification technology. The main technical routes of biomass pressurized gasification technology being researched or popularized are biomass fixed bed gasification technology, biomass fluidized bed gasification technology and biomass entrained-flow bed gasification technology. Biomass fixed bed gasification technology has the disadvantage of difficult processing of tar and methane in the production of synthetic gas. Biomass fluidized bed gasification technology produces synthetic gas with less tar content, but the synthetic gas still contains a large amount of methane which is difficult to process. Biomass fixed bed gasification technology and biomass fluidized bed gasification technology usually need to set high-temperature reformer after gasification furnace to remove tar and methane in synthetic gas, which increases the investment cost, and the operation stability and reliability of high-temperature reformer are also questionable. The synthetic gas produced by biomass entrained-flow bed gasification technology itself has the characteristics of almost no tar and methane, but the problem of heat recovery of high-temperature synthetic gas has not been well solved, especially the high content of alkali metal in biomass, which easily causes the heating surface of waste heat boiler to be contaminated, resulting in low efficiency of heat recovery equipment.

[0004] Therefore, a kind of high-efficiency heat recovery's biomass dry powder pressurized entrained-flow bed gasification furnace is proposed, which can realize efficient biomass gasification and full heat recovery, and effectively promote the development of green methanol industry based on biomass gasification technology. SUMMARY

[0005] The utility model discloses in order to overcome the insufficient of prior art, propose a kind of high-efficiency heat recovery's biomass dry powder pressurized entrained-flow bed gasification furnace, mainly solve biomass gasification, synthetic gas high-efficiency heat recovery, alkali metal contamination resistance, gasification furnace inside high-efficiency dust removal and other process problems.

[0006] In order to achieve the above technical purpose, the following technical scheme is proposed:

[0007] A high-efficiency heat-recovery biomass dry powder pressurized entrained-flow gasifier is longitudinally arranged and comprises a gasifier gasification chamber in an upper section and a gasifier slag gas treatment chamber in a lower section.

[0008] A burner for feeding in biomass powder and carrier gas is mounted on the top of the gasifier gasification chamber. The burner is provided with at least two process medium channels, and the burner has a water cooling protection function.

[0009] The gasifier gasification chamber and the gasifier slag gas treatment chamber can be integrally manufactured or separately manufactured through flange connection.

[0010] The gasifier gasification chamber is provided with a burner mounting port on the top and a gasifier gasification chamber outlet on the bottom, and has a double-layer structure comprising an inner container and an outer shell. The inner container adopts a refractory brick structure or a water-cooled wall structure, the gasification operating temperature is 1200-1500°C, and the gasification pressure is 1.0-6.4 MPa.

[0011] The gasifier slag gas treatment chamber is divided into two sections in whole, the middle and upper section is a radiant waste boiler, and the lower section is a slag water bath section. The radiant waste boiler is provided with a low-temperature synthesis gas inlet sweeping route, a low-temperature synthesis gas inlet cooling route, and a synthesis gas outlet route.

[0012] The radiant waste boiler shell is provided with one or more boiler feed water outlets on the top, one or more boiler feed water inlets on the lower end of the side wall, and one or more gas curtain gas inlets on the upper end of the side wall. The heating surface of the radiant waste boiler is arranged with multiple groups of annular gas curtain soot blowers connected with the gas curtain gas inlets in the vertical space. The jet velocity of the gas curtain soot blowers is set to be between 15-45 m / s according to different pressures. The gas curtain soot blowers use low-temperature synthesis gas from a circulating machine for continuous or intermittent gas curtain sweeping to ensure that the heating surface is not slagged and not sooted. The gas curtain gas inlets and the multiple groups of gas curtain soot blowers form a low-temperature synthesis gas inlet sweeping route.

[0013] The radiant waste boiler shell is provided with a quenching gas inlet and a boiler feed water inlet on the lower part of the side wall, and a synthesis gas outlet below the quenching gas inlet and the boiler feed water inlet. The radiant waste boiler is provided with an annular quenching gas jet at the height corresponding to the quenching gas inlet and a micro-cyclone annular gas collector at the height corresponding to the synthesis gas outlet. A plurality of micro-cyclone separators are uniformly distributed at the lower end of the micro-cyclone annular gas collector. The quenching gas inlet and the annular quenching gas jet form a low-temperature synthesis gas inlet cooling route, and the jet velocity of the quenching gas jet is set to be between 5-30 m / s. The micro-cyclone separators, the micro-cyclone annular gas collector, and the synthesis gas outlet form a synthesis gas outlet route. According to the design of the project implementation, the micro-cyclone annular gas collector can be designed as a whole circular tube structure or a structure composed of multiple arc-shaped ring tubes, and each ring tube is provided with a corresponding synthesis gas outlet.

[0014] The low-temperature synthesis gas from the circulating machine enters the annular quenching gas nozzle from the quenching gas inlet to continuously spray gas into the furnace to reduce the temperature, so that the synthesis gas is quenched to avoid the temperature range of alkali metal contamination, and the synthesis gas after dust removal by the micro-cyclone separator is collected by the micro-cyclone annular gas collector at the lower end of the radiation waste pot, and the synthesis gas after fine dust separation is discharged from the synthesis gas outlet through the gas conveying pipe into the subsequent convection waste pot.

[0015] The bottom of the gasification furnace slag gas treatment chamber is provided with a slag discharge port, and a slag breaker can be installed at the lower end of the slag discharge port, the coarse slag generated by gasification passes through the water bath at the lower segment of the gasification furnace slag gas treatment chamber, is crushed by the slag breaker, and is discharged into the slag water treatment unit.

[0016] The micro-cyclone separator is located at the end of the radiation waste pot and is arranged in an annular array along the inner diameter of the furnace body, and the number of arrangements is calculated according to the amount of synthesis gas.

[0017] The process flow of the biomass dry powder pressurized entrained-flow gasification furnace cooperating with the gasification system is as follows: The pre-mixed superheated steam and oxygen are sprayed into the gasification chamber of the gasification furnace together with the biomass powder through the burner installed at the top of the gasification furnace to generate a high-temperature gasification reaction to generate synthesis gas, the high-temperature synthesis gas with a temperature of about 1200-1500 DEG C flows from the gasification chamber of the gasification furnace into the gasification furnace slag gas treatment chamber, the synthesis gas is first reduced in temperature to 700-850 DEG C by the built-in radiation waste pot to recover heat, then mixed with low-temperature synthesis gas drawn from the subsequent system to be quenched to 500-650 DEG C to avoid the alkali metal contamination temperature section of the biomass ash, then the synthesis gas continues to flow downward, the coarse slag in the gasification furnace slag gas treatment chamber directly falls into the water bath below due to gravity, most of the fine dust is also separated from the synthesis gas by the micro-cyclone separator and falls into the water bath, the separated synthesis gas is collected by the micro-cyclone annular gas collector and discharged from the synthesis gas outlet of the gasification furnace, then enters the convection waste pot through the gas conveying pipe to further recover heat and reduce the temperature to 320-250 DEG C and then enters the subsequent synthesis gas purification unit, and the coarse slag and a small amount of fine dust separated by the gasification furnace slag gas treatment chamber are crushed by the slag breaker below and then fall into the slag discharge lock hopper, are discharged into the slag water treatment unit through the slag discharge lock hopper, and a large amount of fine dust enters the slag water treatment unit with the black water discharged from the gasification furnace slag gas treatment chamber.

[0018] The beneficial technical effects brought by the technical scheme are as follows:

[0019] The utility model discloses a biomass dry powder pressurized gas flow bed gasification technical route, overcome the traditional atmospheric pressure biomass gasification single furnace processing capacity small, equipment covers the big, the low economic nature's shortcoming, overcome the fixed bed pressurized gasification and fluidized bed pressurized gasification technology synthetic gas contains the oil tar and the methane's shortcoming, possess effective gas composition high, cold coal gas efficiency is high, synthetic gas does not contain the tar and the methane, the operation cost is low's characteristics, can create higher economic efficiency,

[0020] The utility model discloses a full waste boiler process of radiation waste boiler and convection waste boiler, and through setting up the circulating gas curtain blowing and gas quenching of low temperature synthetic gas, can effectively avoid the radiation waste boiler heating surface slagging, dust accumulation, and avoid the alkali metal contamination problem in synthetic gas, thereby ensuring that the process system of the utility model realizes efficient heat recovery and long-period stable operation.

[0021] Three, the utility model discloses a plurality of micro cyclone separators of array arrangement are set up in the lower end of the radiation waste boiler of gasification furnace slag gas treatment room, and a large amount of fine ash in synthetic gas can be separated through micro cyclone separator in the gasification furnace slag gas separation chamber, compared with the complex dry method dust removal system of traditional process setting in the convection waste boiler, the utility model has the characteristics of dust removal equipment simple, covers the small area, the operation cost is low, can reduce the dust removal system investment and operation cost and ensure stable and reliable operation. ACCURACY OF DRAWINGS

[0022] Figure 1 It is high -efficient heat recovery's biomass dry powder pressurized gas flow bed gasification furnace schematic diagram in the utility model.

[0023] Figure 2 It is micro cyclone separator arrangement schematic diagram in the gasification furnace slag gas treatment room in the utility model.

[0024] Figure 3 It is the process flow schematic diagram corresponding to the gasification furnace in the utility model.

[0025] Figure 4 It is the overhead schematic diagram of single annular gas collecting pipe arrangement in the utility model.

[0026] Figure 5 It is the overhead schematic diagram of two annular gas collecting pipe arrangement in the utility model.

[0027] In the drawing: 1 burner, 2 gasification furnace gasification chamber, 3 gasification furnace slag gas treatment room, 4 slag breaker, 5 slag discharge lock hopper, 6 gas conveying pipe, 7 convection waste boiler, 8 circulating machine;

[0028] 221 gasification furnace gasification chamber export, 222 burner installation mouth, 223 gasification furnace gasification chamber inner bag, 224 gasification furnace gasification chamber shell;

[0029] 331 Micro cyclone separator, 332 Micro cyclone annular gas collecting pipe, 333 Radiation waste boiler, 334 Gas curtain inlet, 335 Quenching gas inlet, 336 Syngas outlet, 337 Slag discharge port, 338 Quenching black water outlet, 339 Boiler feedwater inlet, 3310 Boiler feedwater outlet, 3311 Gas curtain soot blowing port, 3312 Quenching gas nozzle. Detailed Implementation

[0030] The technical solutions in this embodiment are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this solution, not all embodiments. Based on the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] like Figure 1 As shown: A biomass dry powder pressurized fluidized bed gasifier is arranged longitudinally. The upper section of the gasifier is the gasification chamber 2, and the lower section is the slag gas treatment chamber 3. The burner 1 is installed on the top of the gasification chamber 2. The burner 1 is provided with two process medium channels and has a water-cooling protection function. Biomass powder and carrier gas enter the furnace body through the burner 1.

[0032] In this embodiment, the gasification chamber 2 and the slag gas treatment chamber 3 of the gasifier are manufactured as a single unit.

[0033] The gasification chamber 2 of the gasifier has a burner mounting port 222 at the top and a gasification chamber outlet 221 at the bottom. The gasification chamber 2 has a double-layer structure, including an inner liner 223 and an outer shell 224. The inner liner 223 is made of refractory brick. In this embodiment, the gasification operating temperature is set to 1300℃ based on the material characteristics, and the gasification pressure is set to 2.8 MPa based on the overall plant process.

[0034] The gasifier slag gas treatment chamber 3 is connected to the gasifier gasification chamber 2 via the gasifier gasification chamber outlet 221; the gasifier slag gas treatment chamber 3 is divided into two sections, the upper and middle sections are radiant waste boilers 333, and the lower section is the slag water bath section.

[0035] The upper and middle sections of the gasification slag gas treatment chamber 3 include two low-temperature syngas inlet routes and one syngas outlet route.

[0036] The radiant waste boiler 333 has a boiler feedwater outlet 3310 installed on the top of its shell and two air curtain inlets 334 installed on the upper end of its side wall. The heating surfaces inside the radiant waste boiler 333 are vertically arranged with multiple sets of annular air curtain soot blowing ports 3311 connected to the air curtain inlets 334. Low-temperature syngas from the circulating unit 8 enters the furnace through the air curtain inlets 334 and purges the heating surfaces through the air curtain soot blowing ports 3311. The topmost set of air curtain soot blowing ports 3311 performs continuous air curtain purging, while the other sets perform intermittent purging, thus ensuring that the high-temperature heating surfaces at the top do not slag and the heating surfaces at the bottom do not accumulate ash, forming a low-temperature syngas inlet purging route.

[0037] The spacing between two adjacent sets of annular air curtain soot blowing nozzles 3311 is set according to the overall furnace structure and site environment. In this implementation case, the spacing between two adjacent sets of annular air curtain soot blowing nozzles 3311 is set to 2 meters. The ejection velocity of the annular air curtain soot blowing nozzles 3311 is set between 15 and 45 m / s depending on the pressure. The nozzle diameter and ejection volume are calculated according to the size of the radiant waste boiler and the process of circulating quench gas in the specific project.

[0038] The lower part of the side wall of the radiant waste boiler 333 is equipped with a quench gas inlet 335 and a boiler feedwater inlet 339. Below the side wall of the quench gas inlet 335 and the boiler feedwater inlet 339, two syngas outlets 336 are also installed. An annular quench gas nozzle 3312 is installed inside the radiant waste boiler 333 at the height corresponding to the quench gas inlet 335, and a micro-cyclone annular gas collecting pipe 332 is installed at the height corresponding to the syngas outlets 336. Several micro-cyclone separators 331 are evenly distributed at the lower end of the micro-cyclone annular gas collecting pipe 332. Low-temperature syngas from the circulating machine 8 enters the furnace body through the quench gas inlet 335 and is continuously cooled by jets of gas into the furnace through the annular quench gas nozzle 3312. This quenching and cooling of the syngas avoids the temperature range contaminated by alkali metals, forming a low-temperature syngas inlet cooling path. The gas velocity at the quench gas nozzle is set between 5 and 30 m / s.

[0039] The microcyclone annular air collecting pipe 332 can be Figure 4 The structure shown, consisting of the entire annular tube, can also be... Figure 5 The structure consists of two arc-shaped ring tubes. This embodiment uses... Figure 5 The structure shown in the diagram has a micro-cyclone annular air collection tube 332 composed of two arc-shaped annular tubes. The position and spacing of the two arc-shaped annular tubes are specifically set according to the airflow collected upward by the micro-cyclone separator 331 below. The minimum spacing between the two arc-shaped annular tubes is the spacing between the two micro-cyclone separators 331.

[0040] like Figure 2As shown, the micro-cyclone separators 331 are arranged in an annular array along the inner diameter of the furnace body, and the number of the micro-cyclone separators 331 is determined according to the amount of the synthesis gas. The micro-cyclone inlet pipe of the micro-cyclone separator 331 is preferably arranged in parallel with the tangent of the annular circumference.

[0041] The synthesis gas from the two paths of purging and cooling in the radiation waste pot is separated from the fine ash by the micro-cyclone separators 331, and the synthesis gas separated from the fine ash is discharged from the synthesis gas outlet 336, i.e., the micro-cyclone separator 331, the micro-cyclone annular gas collector 332, and the synthesis gas outlet 336 form a synthesis gas discharge route. The two gas conveying pipes 6 connected to the synthesis gas outlet 336 enter the subsequent convection waste pot for work.

[0042] The bottom of the gasification furnace slag gas treatment chamber 3 is provided with a slag discharge port 337. The coarse slag generated by gasification is discharged from the slag discharge port 337 after passing through the slag water bath section below the gasification furnace slag gas treatment chamber 3 and enters the subsequent slag treatment. Further, the slag water bath section shell side wall of the gasification furnace slag gas treatment chamber 3 is provided with a quenching black water outlet 338, and the black water carrying a large amount of fine ash is discharged through the quenching black water outlet 338.

[0043] The high-efficiency heat recovery biomass dry powder pressurized gas flow bed gasification furnace designed in this embodiment has a process flow cooperating with the gasification system as follows:

[0044] The pre-mixed superheated steam, oxygen, and biomass powder are injected into the gasification chamber 2 of the gasification furnace through the burner 1 installed at the top of the gasification furnace to occur a high-temperature gasification reaction. The reaction in the gasification chamber is set to 2.8 Mpa, and the gasification temperature is set to about 1300℃. The high-temperature synthesis gas generated by the reaction flows into the gasification furnace slag gas treatment chamber 3 from the top to the bottom of the gasification furnace gasification chamber 2.

[0045] In the gasification furnace slag gas treatment chamber 3, the high-temperature synthesis gas is first cooled to about 800℃ by the radiation waste pot 333 to mix with the low-temperature synthesis gas (about 150℃~280℃ according to different gasification pressures) drawn from the washing tower by the circulating machine 8 to be cooled to about 600℃ to avoid the alkali metal contamination temperature section of the biomass ash slag, and then the synthesis gas in the furnace continues to flow downward. In the gasification furnace slag gas treatment chamber 3, the coarse slag directly falls into the slag water bath section below due to gravity, and most of the fine ash is separated from the synthesis gas by the micro-cyclone separators 331 and then falls into the water bath. The separated synthesis gas is collected by the micro-cyclone annular gas collector 332 and discharged from the synthesis gas outlet 336 of the gasification furnace, and then enters the convection waste pot 7 through the gas conveying pipe 6 to further recover heat and be cooled to about 260℃ before being sent to the synthesis gas purification unit.

[0046] The coarse slag and a small amount of fine ash separated by the gasification furnace slag gas treatment chamber 3 fall into the slag discharge lock hopper 5 through the slag breaker 4 below, are discharged through the slag discharge lock hopper 5 and are treated in the slag water treatment unit, while a large amount of fine ash enters the slag water treatment unit along with the black water discharged by the gasification furnace slag gas treatment chamber 3.

[0047] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made according to the technical essence of the present application to the above embodiment falls within the protection scope of the present application.

Claims

1. A high efficiency heat recovery biomass dry powder pressurized entrained flow gasifier, characterized in that: The gasifier is longitudinally arranged, the upper section of the gasifier is a gasification chamber (2), the lower section is a slag gas treatment chamber (3), the top of the gasification chamber (2) is provided with a burner (1) with water cooling protection function for feeding biomass powder and carrier gas, the bottom of the gasification chamber (2) is provided with a gasification chamber outlet (221), and the slag gas treatment chamber (3) is connected with the gasification chamber (2) through the gasification chamber outlet (221); the slag gas treatment chamber (3) is divided into two sections, the upper section is a radiant waste boiler (333), and the lower section is a slag water bath section, the slag gas treatment chamber (3) is provided with a low-temperature synthesis gas inlet sweeping route, a low-temperature synthesis gas inlet cooling route and a synthesis gas outlet route.

2. The high-efficiency heat-recovery biomass dry-feed pressurized entrained-flow gasifier according to claim 1, characterized in that: The gasification chamber (2) and the slag gas treatment chamber (3) are integrally manufactured or are separately manufactured through flange connection.

3. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 1, characterized in that: The burner (1) is provided with at least two process medium channels.

4. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 1, characterized in that: The top of the gasification chamber (2) is provided with a burner mounting port (222), and the bottom is provided with a gasification chamber outlet (221); the gasification chamber (2) has a double-layer structure, including a gasification chamber inner container (223) and a gasification chamber outer shell (224), and the gasification chamber inner container (223) adopts a refractory brick structure or a water cooling wall structure; the gasification operation temperature of the gasification chamber (2) is 1200-1500 DEG C, and the gasification pressure is 1.0-6.4 MPa.

5. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 1, characterized in that: The top of the shell of the radiant waste boiler (333) is provided with a boiler feed water outlet (3310), the upper end of the side wall of the shell is provided with a gas curtain gas inlet (334), the heating surface in the furnace of the radiant waste boiler (333) is arranged with a plurality of annular gas curtain blowdown ports (3311) in communication with the gas curtain gas inlet (334) in the vertical space, and the gas curtain gas inlet (334) and the plurality of gas curtain blowdown ports (3311) form a low-temperature synthesis gas inlet sweeping route.

6. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 5, characterized in that: The distance between the two adjacent groups of annular gas curtain blowdown ports (3311) is set according to the overall furnace body structure and the site environment.

7. The high-efficiency heat-recovery biomass dry-fuel pressurized entrained-flow gasifier according to claim 1, characterized in that: The lower part of the side wall of the shell of the radiant waste boiler (333) is provided with a quenching gas inlet (335) and a boiler feed water inlet (339), and the lower part of the side wall below the quenching gas inlet (335) and the boiler feed water inlet (339) is provided with a synthesis gas outlet (336); the radiant waste boiler (333) is provided with an annular quenching gas nozzle (3312) corresponding to the height of the quenching gas inlet (335) and a micro-cyclone annular gas collector (332) corresponding to the height of the synthesis gas outlet (336), and a plurality of micro-cyclone separators (331) are uniformly distributed at the lower end of the micro-cyclone annular gas collector (332); the quenching gas inlet (335) and the annular quenching gas nozzle (3312) form a low-temperature synthesis gas inlet cooling route. The micro-cyclone separator (331), the micro-cyclone annular gas collector (332) and the synthesis gas outlet (336) form a synthesis gas outlet route.

8. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 7, characterized in that: The micro-cyclone separator (331) is arranged in an annular array along the inner diameter of the furnace body, and the number of arrangements is calculated according to the amount of synthesis gas.

9. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 7, characterized in that: The micro-cyclone inlet pipe of the micro-cyclone separator (331) is arranged in parallel with the tangential line of the annular circumference.

10. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 7, characterized in that: The micro-cyclone annular collecting pipe (332) is a whole annular pipe structure or a structure composed of multiple arc annular pipes, and each arc annular pipe is provided with a corresponding syngas outlet (336).

11. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 1, characterized in that: The temperature in the radiant waste heat boiler through which the low-temperature syngas inlet purge route passes is 700-850 DEG C, and the temperature in the radiant waste heat boiler through which the low-temperature syngas inlet cooling route passes is 500-650 DEG C.

12. The high-efficiency heat-recovery biomass dry-powder pressurized entrained-flow gasification furnace according to claim 1, characterized in that: The slag water bath section of the gasification slag gas treatment chamber (3) is provided with a slag discharge port (337) at the bottom, and the side wall of the slag water bath section shell is provided with a quenching black water outlet (338). The micro-cyclone inlet pipe of the micro-cyclone separator (331) is arranged in parallel with the tangential line of the annular circumference. The micro-cyclone annular collecting pipe (332) is a whole annular pipe structure or a structure composed of multiple arc annular pipes, and each arc annular pipe is provided with a corresponding syngas outlet (336). The temperature in the radiant waste heat boiler through which the low-temperature syngas inlet purge route passes is 700-850 DEG C, and the temperature in the radiant waste heat boiler through which the low-temperature syngas inlet cooling route passes is 500-650 DEG C. The slag water bath section of the gasification slag gas treatment chamber (3) is provided with a slag discharge port (337) at the bottom, and the side wall of the slag water bath section shell is provided with a quenching black water outlet (

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