CN111961503A

CN111961503A - Double-furnace type powder flight gasification device

Info

Publication number: CN111961503A
Application number: CN202010918491.3A
Authority: CN
Inventors: 陈志伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2020-11-20

Abstract

The invention discloses a double-furnace type powder flying gasification device, which belongs to the technical field of fuel gasification, and is characterized in that two heat storage chambers are used for preheating a gasification agent and cooling high-temperature fuel gas in turn, two gasification furnaces are required to feed in turn, a feed inlet of each gasification furnace is connected with a fuel feed pipeline for inputting powdery solid fuel, and the inner wall of an outlet end pipeline at the joint of the fuel feed pipeline and the feed inlet is often condensed and bonded with molten matters to cause blockage, so that normal feeding is influenced, and the production is greatly influenced. The invention can better solve the problems by adopting various technical schemes of arranging a scavenging gas inlet on a public feeding pipeline or a fuel feeding pipeline, arranging a gate on a feeding hole, arranging the fuel feeding pipeline as a movable feeding pipe, arranging a forced feeding device on the feeding hole and the like.

Description

Double-furnace type powder flight gasification device

Technical Field

The invention belongs to the technical field of fuel gasification, and particularly relates to a double-furnace type gasification device for high-temperature gasification of powdery solid fuel in a flying state.

Background

In the field of fuel gasification, powdery solid fuel is gasified in a flying state, and the gasification efficiency is high. The invention with the application number of 201510995749.9 discloses a method and a kiln for producing combustible gas, which can gasify powdery solid fuel at high temperature in a flying state and recover waste heat generated by high-temperature reaction, the gasification device needs to alternately use two heat storage chambers for preheating gasification agent and cooling high-temperature fuel gas, two gasification furnaces are used for alternately feeding, a fuel feeding pipeline is connected to a feeding port of each gasification furnace for inputting the powdery solid fuel, and the inner wall of an outlet end pipeline at the connection part of the fuel feeding pipeline and the feeding port is often bonded by molten matters to cause blockage, thereby influencing the smooth feeding of the powdery solid fuel. When feeding is not smooth, the feeding amount of fuel can be reduced, the gas production rate is reduced, and the stability of the working condition of the kiln is influenced; when the blockage is serious, the material can not be fed, and the furnace can only be shut down for maintenance, thereby causing great economic loss.

Disclosure of Invention

In order to solve the above problems, the inventors have carefully studied and found that: the heat storage chambers are used for reversing once every a period of time, the direction of air flow in the gasification furnaces and the heat storage chambers is changed into the direction opposite to that before reversing every time, the two heat storage chambers can be respectively used for preheating gasification agents and cooling high-temperature fuel gas in turn, and the two gasification furnaces need to feed in turn; the gasification furnace connected with the regenerative chamber for preheating the gasification agent is in a feeding state, the powdery solid fuel is dispersed in the high-temperature gasification agent in the hearth of the gasification furnace and is in a flying state, the heat transfer and mass transfer efficiency is very high, the gasification combustion is rapidly completed, and CO and H containing gas above 1450 ℃ are produced₂The ash content of the powdery solid fuel is rapidly melted into liquid-state molten dust, the molten dust is flushed with the furnace wall in the hearth along with the flow of the high-temperature gas, most of the molten dust is adhered to the furnace wall, the liquid-state molten dust flows downwards to a liquid outlet near the bottom of the hearth to be output under the action of gravity, the high-temperature gas output from an exhaust port of the gasification furnace still carries a small part of the molten dust, but the high-temperature gas enters a second gasification furnace, the second gasification furnace is in a feeding stop state, the small part of the molten dust carried by the high-temperature gas is adhered to the furnace wall of the second gasification furnace to be purified and separated, and the purified high-temperature gas is input into a heat storage chamber for cold determination of the high-temperature gas to recover heat; because the powdery solid fuel can be stuck on the inner wall of the outlet end of the fuel feeding pipeline connected with the feeding port of the gasification furnace when entering the gasification furnace connected with the regenerative chamber for preheating the gasification agent, when the direction is changed, the fuel feeding pipeline connected with the feeding port of the gasification furnace stops feeding, and the high-temperature fuel gas entering the gasification furnace from another gasification furnace can lead the feeding port of the gasification furnace to be enabledThe heating of the inner wall of the outlet end of the connected fuel feeding pipeline is increased, ash contained in the powdery solid fuel adhered to the inner wall of the outlet end of the pipeline is heated, melted and adhered to the inner wall of the outlet end of the pipeline, when the fuel feeding pipeline returns to feeding after the reversing is performed again, the newly-entered powdery solid fuel can be adhered to a fused mass adhered to the inner wall of the outlet end of the pipeline and reduce the temperature of the inner wall of the outlet end of the pipeline, so that the adhered fused mass is solidified in a cooling mode, and therefore under the condition of continuous repeated reversing, repeated adhesion solidification can occur, the adhered mass is accumulated continuously, and blocking is caused.

In order to solve the above problems, the inventors have repeatedly studied and experimented and obtained a new scheme:

a double-furnace type powder flight gasification device comprises two gasification furnaces, fuel feeding equipment and a gasification agent preheating system; the gasification agent preheating system comprises two regenerators, two air inlet reversing flashboards, two air outlet reversing flashboards, gasification agent input equipment and fuel gas discharge equipment; when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet.

The gasification agent preheating system comprises the following connection modes of various components: the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state.

The gasification furnace comprises a feeding reversing gate, a fuel feeding pipeline, an air inlet, an air outlet and a feeding hole; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end of the fuel feeding pipeline is communicated with the feeding hole of the gasification furnace, and the inlet end of the fuel feeding pipeline is connected with a feeding reversing gate of the gasification furnace; the feeding reversing gates of the two gasification furnaces are respectively connected with fuel feeding equipment through a common feeding pipeline; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the feeding reversing gate of the gasification furnace is in an open state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the feeding reversing gate of the other gasification furnace is in a closed state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; and a purge gas input port is arranged on the common feed pipeline.

Compared with the prior art, the scavenging gas in the scheme has the effect of scavenging the inner wall of the outlet end of the fuel feeding pipeline, so that the powdery solid fuel is prevented from being adhered to the inner wall of the outlet end of the fuel feeding pipeline, the fusion bonding is avoided, and the blockage can be avoided.

The inventor researches and discovers that: under the ideal state, the melting dust that the high temperature gas carried purifies the separation back through the furnace of two gasifiers, and the high temperature gas can reach the regenerator recovery heat that is used for cold exact high temperature gas of reinjection after very clean degree, under this condition, adopts above-mentioned technical scheme can solve the problem that the feed inlet blockked up betterly. However, such an ideal degree may not be achieved, and 100% of the molten dust may not be completely separated, and a very small amount of molten dust that is difficult to completely separate may not be completely separated, and may fly into the fuel feed pipe of the second gasification furnace (in a feed stop state) and adhere to the inner wall of the outlet end of the pipe, and may cause clogging of the feed port after a relatively long time of accumulation.

In order to solve the above problems, the inventors have repeatedly studied and experimented and obtained a second new solution:

the utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers and gasifying agent preheat the system, gasifying agent preheats each part of system and connected mode and is the same with last scheme, and the difference still lies in:

the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is communicated with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; and a scavenging gas inlet is arranged on the fuel feeding pipeline.

Because the fuel feeding pipelines of the two gasification furnaces are provided with the blowing gas inlets, when the fuel feeding equipment of the other gasification furnace is in a feeding stop state, the blowing gas is also input into the hearth from the fuel feeding pipeline of the gasification furnace, so that high-temperature molten dust which is not completely purified by the hearth is prevented from flying into the fuel feeding pipeline, the high-temperature molten dust is prevented from being adhered to the inner wall of the outlet end of the fuel feeding pipeline to cause blockage, the inner wall of the outlet end of the pipeline can be cooled, and the inner wall of the outlet end is prevented from being heated to the melting point temperature of ash contained in the fuel.

In order to solve the above problems, the inventors have repeatedly studied and experimented and obtained a third new solution:

the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is communicated with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; a gate is arranged on the feeding hole; the gate on the feed inlet communicated with the fuel feeding equipment in the feeding starting state is in an opening state, and the gate on the feed inlet communicated with the fuel feeding equipment in the feeding stopping state is in a closing state.

In order to solve the above problems, the inventors have repeatedly studied and experimented to obtain a fourth new solution:

the gasification furnace comprises fuel feeding equipment, a fuel feeding pipeline, a gas inlet, a gas outlet and a feeding hole; the fuel feeding pipeline is a movable feeding pipe, and the outlet end of the movable feeding pipe is movably connected with the feeding hole; the preheating gas outlet is communicated with a gas inlet of one gasification furnace, a feed inlet of the gasification furnace is communicated with fuel feeding equipment through a movable feed pipe, a gas outlet of the gasification furnace is communicated with a gas inlet of the other gasification furnace through a gas flow channel, and a gas outlet of the other gasification furnace is communicated with a high-temperature gas inlet; the feed inlet of the other gasification furnace is disconnected with the outlet end of the movable feed pipe.

In order to solve the above problems, the inventors have repeatedly studied and experimented and obtained a fifth new solution:

the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is connected with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; a forced feeding device is arranged on the feeding hole; the forced feeding device is a device which pushes the pulverized solid fuel into the feed opening from the fuel feed pipe by mechanical thrust.

Drawings

The double-furnace type powder flight gasification device and the beneficial technical effects thereof are described in detail below with reference to the accompanying drawings and the specific embodiments.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 schematically shows a detail of the area indicated by the dashed circle 24 in fig. 1.

Fig. 3 schematically shows a detail of the area indicated by the dashed circle 25 in fig. 1.

FIG. 4 is a partial structural diagram of a second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 6 schematically shows a detail of the area indicated by the dashed circle 30 in fig. 5.

FIG. 7 is a partial structural diagram of a fourth embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a fifth embodiment of the present invention.

Fig. 9 schematically shows a detail of the region indicated by the dashed circle 33 in fig. 8.

Fig. 10 schematically shows a detail of the region indicated by the dashed circle 34 in fig. 8.

Fig. 11 and 12 are partial schematic structural views of a sixth embodiment of the invention.

Fig. 13 and 14 are partial schematic structural views of a seventh embodiment of the invention.

Fig. 15 and 16 are partial schematic structural views of an eighth embodiment of the invention.

FIG. 17 is a partial schematic structural diagram of a ninth embodiment of the present invention.

Fig. 18 is a schematic structural view of a tenth embodiment of the present invention.

Detailed Description

Example 1

Referring to fig. 1, details of the regions represented by

dashed circles

24, 25 in fig. 1 are seen in fig. 2, 3, respectively. Fig. 1 shows a double-furnace type powder flight gasification device, which comprises two gasification furnaces, a fuel feeding device 1 and a gasification agent preheating system, wherein the gasification agent preheating system comprises two heat storage chambers 3, two air inlet reversing flashboards 4, two air outlet reversing flashboards 5, a gasification agent input device 6 and a fuel gas discharge device 7; when one of the two regenerators 3 is used for preheating the gasifying agent, the other regenerator is used for cold-ensuring high-temperature fuel gas, the regenerator 3 for preheating the gasifying agent is provided with a gasifying agent inlet 18 and a preheated gas outlet 19, and the regenerator 3 for cold-ensuring high-temperature fuel gas is provided with a high-temperature fuel gas inlet 20 and a cold-ensuring fuel gas outlet 21.

The connection mode of all the parts of the gasification agent preheating system has the following characteristics: the gasification agent input device 6 is communicated with the gasification agent inlet 18 through one air inlet reversing gate 4 (the air inlet reversing gate 4 on the right side of the figure 1) in an open state and is connected with the cold gas outlet 21 through the other air inlet reversing gate 4 (the air inlet reversing gate 4 on the left side of the figure 1) in a closed state; the gas outlet device 7 is connected to the cold gas outlet 21 via one gas outlet reversing damper 5 in the open state (the left gas outlet reversing damper 5 in fig. 1) and to the gasifying agent inlet 18 via another gas outlet reversing damper 5 in the closed state (the right gas outlet reversing damper 5 in fig. 1).

The gasification furnace comprises a feeding reversing gate 8, a fuel feeding pipeline 9, an air inlet 10, an air outlet 12 and a feeding hole 13; the fuel feeding pipeline 9 of the gasification furnace comprises an outlet end 15 and an inlet end 16, wherein the outlet end 15 is communicated with the feeding hole 13 of the gasification furnace, and the inlet end 16 is connected with a feeding reversing gate 8 of the gasification furnace; the feeding reversing gates 8 of the two gasification furnaces are respectively connected with the fuel feeding equipment 1 through a common feeding pipeline 17; the preheated gas outlet 19 is communicated with the gas inlet 10 of one gasification furnace, the feeding reversing gate 8 (the feeding reversing gate 8 on the right side of the figure 2) of the gasification furnace is in an open state, the gas outlet 12 of the gasification furnace is communicated with the gas inlet 10 of the other gasification furnace through the gas flow passage 22, the feeding reversing gate 8 (the feeding reversing gate 8 on the left side of the figure 2) of the other gasification furnace is in a closed state, and the gas outlet 12 of the other gasification furnace is communicated with the high-temperature gas inlet 20; a purge gas input port 23 is provided on the common feed conduit 17.

The air inlet reversing flashboards 4 and the air outlet reversing flashboards 5 are used for reversing operation, when one air inlet reversing flashboard 4 and one air outlet reversing flashboard 5 are in an open state, the other air inlet reversing flashboard 4 and the other air outlet reversing flashboard 5 are in a closed state. The air inlet reversing gate plate 4 and the air outlet reversing gate plate 5 are reversed once every a period of time, the air inlet reversing gate plate 4 and the air outlet reversing gate plate 5 which are in an open state before reversing are in a closed state after reversing, and the air inlet reversing gate plate 4 and the air outlet reversing gate plate 5 which are in a closed state before reversing are in an open state after reversing; the feed changeover shutter 8 in the opened state before the changeover becomes the closed state after the changeover, and the feed changeover shutter 8 in the closed state before the changeover becomes the opened state after the changeover.

The reversing operation is generally performed once every 10 to 60 minutes.

Example 1 compared with the prior art, since the common feed pipe 17 is provided with the purge gas inlet 23, the purge gas and the pulverized solid fuel fed from the fuel feeding device 1 are mixed and fed into the furnace 11 from the open feeding direction-changing gate 8 and the fuel feeding pipe 9 and the feed port 13, the purge gas has a purging effect on the inner wall 29 of the outlet end of the fuel feeding pipe to prevent the pulverized solid fuel from adhering to the inner wall 29 of the outlet end of the fuel feeding pipe, after the feeding direction-changing gate 8 communicated with the fuel feeding pipe 9 is closed by direction-changing, the fuel feeding pipe 9 is not fed with the fuel and the purge gas into the furnace 11 (as shown in fig. 3), the high temperature gas flow in the furnace 11 will heat the temperature at the inner wall 29 of the outlet end of the fuel feeding pipe 9 to be higher than the melting point of the ash content of the pulverized solid fuel, but due to the above purging effect, no powdered solid fuel sticks to the outlet end inner wall 29 and no melt stick is formed, which serves to avoid plugging.

Example 2

Referring to FIGS. 1 and 4, the region indicated by a broken line circle 24 in FIG. 1 is replaced by a region indicated by a broken line circle 26 in FIG. 4 to constitute a twin-furnace type powder flight gasification apparatus which is substantially the same in structure as in example 1 except that a purge gas input pipe 27 is connected to a purge gas input port 23 provided in the common feed pipe 17; a valve 28 is provided on the purge gas feed line 27.

Example 3

Referring to fig. 5, the details of the area represented by the dashed circle 30 in fig. 5 refer to fig. 6. Fig. 5 shows a double-furnace type powder flight gasification device, which comprises two gasification furnaces and a gasification agent preheating system the same as that in embodiment 1, and the difference is that:

the gasification furnace comprises a fuel feeding device 1, an air inlet 10, an air outlet 12, a feeding hole 13 and a fuel feeding pipeline 9; the fuel feeding pipeline 9 of the gasification furnace comprises an outlet end 15 and an inlet end 16, wherein the outlet end 15 is communicated with the feeding hole 13 of the gasification furnace, and the inlet end 16 is communicated with the fuel feeding equipment 1 of the gasification furnace; the preheated gas outlet 19 is communicated with the gas inlet 10 of one gasification furnace, the fuel feeding equipment 1 of the gasification furnace is in a starting feeding state, the gas outlet 12 of the gasification furnace is communicated with the gas inlet 10 of the other gasification furnace through the gas flow channel 22, the fuel feeding equipment 1 of the other gasification furnace is in a stopping feeding state, and the gas outlet 12 of the other gasification furnace is communicated with the high-temperature gas inlet 20; the fuel feed pipe 9 is provided with a purge gas inlet 23.

Example 4

Referring to FIGS. 5 and 7, a twin-furnace type pulverized material flight gasification apparatus, which is constructed substantially in the same manner as in example 3 except that a purge gas inlet pipe 27 is connected to a purge gas inlet port 23 provided in a fuel feed pipe 9, is constituted by replacing the region indicated by a dotted circle 30 in FIG. 5 with the region indicated by a dotted circle 31 in FIG. 7; the purge gas feed line 27 is provided with a valve 28.

A valve 28 arranged on the purge gas input pipeline 27 can open or close the purge gas and can also adjust the dosage of the purge gas to ensure that the dosage of the purge gas reaches a proper dosage, so as to avoid that the inner wall 29 of the feed port 13 cannot be purged completely when the dosage is too low; the condition that the consumption of the purge gas is too high and the waste is caused can be avoided; the purge gas is not preheated by the regenerator, and the preheating efficiency of the regenerator is reduced by using too high amount of the purge gas.

The fuel feed line 9, which stops the feed, does not require a large gas velocity to prevent molten dust from flying in, and the purge gas amount can be adjusted small by the valve 28. The feeding fuel feeding pipeline 9 does not need to continuously input purge gas, but only needs to open the valve 28 before reversing to purge the powdery fuel adhered to the inner wall 29 of the outlet end, and the valve 28 can be closed after purging for 3-5 seconds generally. For the scheme of embodiment 2, the valve 28 is opened after the reversing, the fuel feeding pipeline 9 to be fed is purged to ensure that the inner wall 29 of the outlet end is cooled to below the ash melting point temperature, then the fuel feeding device 1 is started to feed, so as to prevent the newly-incoming powdery solid fuel from being stuck on the inner wall 29 of the outlet end in a high-temperature state to cause fusion and adhesion of ash contained in the newly-incoming powdery solid fuel, and the valve 28 can be closed after purging for 5-10 seconds generally. In order to reduce the amount of purge gas, the operator has been operating in the above manner, without continuously feeding purge gas into the feeding fuel feed pipe 9, but, once, because the valve 28 fails to close, he or she has to continuously feed purge gas into the feeding fuel feed pipe 9, in which case he or she has produced 2 days, and the inventor found in the production statistics report that the amount of solid fuel consumed per cubic meter of gas produced is reduced by 1.9% compared to the original amount in the two days. After repeated 2-month comparative experiments, the inventors found that the continuous supply of purge gas to the feeding fuel line 9 can reduce the amount of solid fuel consumed per cubic meter of gas produced by 2.6% compared to the above-described operating mode.

The inventor carefully researches and discovers that because the powdery solid fuel has viscosity, if the blowing gas is not input into the fuel feeding pipeline 9, the powdery solid fuel input into the hearth from the fuel feeding pipeline 9 has a condition that some powder is agglomerated, after the agglomerated powder enters the hearth, the agglomerated powder cannot be blown away by high-temperature gas flow in the hearth, ash contained in the surface layer of the powder agglomerate is rapidly melted to form a powder agglomerate coated by a layer of molten liquid, the powder agglomerate coated by the molten liquid is more difficult to be blown away in the gas flow in the hearth, the solid fuel in the powder agglomerate has a slow reaction speed with the mass transfer and heat transfer of the external high-temperature gas flow, and the solid fuel in the powder agglomerate is discharged out of the gasification furnace along with slag. If the purge gas is continuously input into the fuel feeding pipeline 9 which is feeding, the purge gas plays a role in impacting and blowing away the powder mass when entering the fuel feeding pipeline 9, so that the powdery solid fuel is fully dispersed in the high-temperature airflow in the hearth, fine powdery solid fuel particles are fully contacted with the high-temperature airflow, the reaction speed is high, the gasification can be fully realized, the fuel waste caused by the agglomeration of the powdery solid fuel is avoided, and the unexpected technical effect is achieved. Therefore, the present invention preferably continuously feeds purge gas to the fuel feed pipe 9 being fed.

In the above embodiment, the purge gas input port 23 is connected to a purge gas input device, i.e., the purge gas can be input, and the purge gas can be gasification agent or nitrogen gas. The gasifying agent comprises air or oxygen-enriched air.

The use of air as the purge gas is relatively easy to obtain, and only a blower needs to be connected to the purge gas input port 23, or compressed air may be used for the input. If the furnace pressure in the furnace 11 is controlled to a proper negative pressure value (corresponding to the pressure in the furnace 11 being less than the external pressure and having a proper pressure difference), the fuel feeding pipe 9 or the common feeding pipe 17 can be used as a blowing gas input device to suck the external air to play a role of blowing gas, which is very convenient.

Example 5

Referring to fig. 8, details of the regions represented by dashed

circles

33, 34 in fig. 8 refer to fig. 9, 10, respectively. Fig. 8 shows a double-furnace type powder flight gasification device, which comprises two gasification furnaces and a gasification agent preheating system the same as that in embodiment 1, and the difference is that:

the gasification furnace comprises a fuel feeding device 1, an air inlet 10, an air outlet 12, a feeding hole 13 and a fuel feeding pipeline 9; the fuel feeding pipeline 9 of the gasification furnace comprises an outlet end 15 and an inlet end 16, wherein the outlet end 15 is communicated with the feeding hole 13 of the gasification furnace, and the inlet end 16 is communicated with the fuel feeding equipment 1 of the gasification furnace; the preheated gas outlet 19 is communicated with the gas inlet 10 of one gasification furnace, the fuel feeding equipment 1 of the gasification furnace is in a starting feeding state, the gas outlet 12 of the gasification furnace is communicated with the gas inlet 10 of the other gasification furnace through the gas flow channel 22, the fuel feeding equipment 1 of the other gasification furnace is in a stopping feeding state, and the gas outlet 12 of the other gasification furnace is communicated with the high-temperature gas inlet 20; the feed port 13 is provided with a gate 32; the shutter 32 of the feed opening 13 communicating with the fuel feed apparatus 1 in the feed start state is in the open state, and the shutter 32 of the feed opening 13 communicating with the fuel feed apparatus 1 in the feed stop state is in the closed state.

Compared with the prior art, the embodiment 5 has the following beneficial effects: when the high-temperature gas flow discharged from the right-side gasification furnace in fig. 8 enters the left-side gasification furnace, the gate 32 of the left-side gasification furnace is in a closed state (as shown in fig. 9), so that the high-temperature gas flow can be prevented from heating and melting ash contained in the fuel adhered to the inner wall 29 of the outlet end of the fuel feeding pipe of the left-side gasification furnace, and the high-temperature molten dust in the left-side gasification furnace can be prevented from flying from the feeding port 13 and adhering to the inner wall 29 of the outlet end of the fuel feeding pipe, thereby playing a role of.

Example 6

Referring to FIGS. 8, 11 and 12, the regions indicated by the dotted circles 33 and 34 in FIG. 8 are replaced by the regions indicated by the dotted circles 53 and 54 in FIGS. 11 and 12, respectively, to constitute a twin-furnace type pulverized material flight gasification apparatus including two gasifiers and the same gasifying agent preheating system as in example 1, except that:

the gasification furnace comprises a fuel feeding device 1, a fuel feeding pipeline, a gas inlet 10, a gas outlet 12 and a feeding hole 13; the fuel feeding pipeline is a movable feeding pipe 43, and an outlet end 44 of the movable feeding pipe 43 is movably connected with the feeding hole 13; the preheated gas outlet 19 is communicated with the gas inlet 10 of one gasification furnace, the feed port 13 of the gasification furnace is communicated with the fuel feeding equipment 1 through a movable feed pipe 43, the gas outlet 12 of the gasification furnace is communicated with the gas inlet 10 of the other gasification furnace through a gas flow channel 22, and the gas outlet 12 of the other gasification furnace is communicated with the high-temperature gas inlet 20; the feed port 13 of the other gasification furnace is disconnected from the outlet end 44 of the movable feed pipe 43.

The movable feed pipe 43 comprises a fixed pipe 47, a movable pipe 46, a shutter plate 48, a piston 49 and a driving mechanism 50 for pushing the piston 49 to reciprocate; the stationary tube 47 includes an inlet end 45, an outlet 52; said inlet end 45 is in communication with the fuel feeding device 1; the moving tube 46 includes an inlet 51, an outlet 44; the shutter plate 48 is fixedly connected to the outer side of the inlet 51 of the moving pipe 46; the piston 49 is connected with the moving pipe 46; when the moving pipe 46 is pushed to the pushing end position of the reciprocating motion by the piston 49, the outlet end 44 is communicated with the feed port 13 (as shown in fig. 12), and the inlet 51 is communicated with the outlet 52; when the movable tube 46 is pushed by the piston 49 to the retracted end position of the reciprocating movement, the outlet end 44 is disconnected from the feed port 13 (as shown in fig. 11), the inlet 51 is disconnected from the outlet 52, and the shutter 48 covers the outlet 52.

It is difficult to know the specific degree of clogging without disconnecting the feed opening 13 from the fuel feed line 9. In this embodiment, an operator can disconnect the feeding port 13 which has stopped feeding from the movable feeding pipe 43 at any time, and check whether the inner wall 29 of the outlet end of the movable feeding pipe is condensed and bonded with molten material, so that the operator can clean the material bonded on the inner wall 29 of the movable feeding pipe by using a conventional tool such as an electric drill, an iron brush or a grinding wheel, and the like, thereby preventing the material from being blocked when more and more materials are bonded. The method has the advantages that as long as the connection between the feeding port 13 which stops feeding and the outlet end 44 of the movable feeding pipe 43 is disconnected, the high-temperature airflow in the hearth 11 which stops feeding can be prevented from heating the powder adhered on the inner wall 29 of the outlet end 44, and the high-temperature molten dust which is not completely purified in the hearth 11 which stops feeding can be prevented from flying into the movable feeding pipe 43 from the feeding port 13 and adhering on the inner wall 29 of the outlet end, so that the blockage can be avoided. However, the disadvantage is that after the connection is broken, the feed port 13 is communicated with the outside, which causes heat loss of the hearth to the outside; when the pressure in the furnace is higher than the external air pressure, high-temperature fuel gas in the furnace can be leaked. Therefore, the furnace pressure should be adjusted to be slightly lower than the outside pressure when the connection is disconnected.

Example 7

Figures 13 and 14 schematically show a mobile feed pipe and a gate. The areas indicated by the dotted circles 33 and 34 in FIG. 8 were replaced by the areas indicated by the dotted circles 65 and 66 in FIGS. 13 and 14, respectively, to constitute a twin-furnace type powder flight gasification apparatus which is substantially the same in structure as in example 6 except that the feed port 13 thereof was provided with the shutter 32 and which further had the moving feed pipe 43 of a different structure from that of example 6.

Referring to fig. 13 and 14, the traveling feed tube 43 includes an inner tube 55, an outer tube 56, an outlet end 44, an inlet end 45, a crossbar 57, a piston 58, and a drive mechanism 59 for reciprocating the piston 58; said inlet end 45 is in communication with the fuel feeding device 1; one end of the cross arm 57 is connected with the outer tube 56, and the other end is connected with the piston 58; the outer tube 56 is sleeved on the inner tube 55, and an oil seal 60 is arranged in a gap between the outer tube and the inner tube; the outer tube 56 is pushed by the piston 58 and the cross arm 57 to the reciprocating advanced end position, the outlet end 44 is disconnected from the feed port 13 and is away from the feed port 13 (as shown in fig. 13), and the outlet end 44 is communicated with the feed port 13 when pushed by the piston 58 and the cross arm 57 to the reciprocating retracted end position (as shown in fig. 14). The gate 32 comprises a gate plate 61, a cross arm 62, a piston 63 and a driving mechanism 64 for pushing the piston 63 to reciprocate; one end of the cross arm 62 is connected with the gate plate 61, and the other end is connected with the piston 63; the shutter plate 61 covers the feed port 13 when the shutter plate 61 is pushed to the reciprocation advancing end position by the piston 63 and the crossbar 62, and the shutter plate 61 is separated from the feed port 13 when the shutter plate 61 is pushed to the reciprocation retracting end position by the piston 63 and the crossbar 62.

The gate 32 of the inlet port 13 communicating with the movable feed pipe 43 is opened (as shown in fig. 14) to allow the fuel to smoothly enter the furnace; the gate 32 of the inlet 13 disconnected from the outlet end 44 of the movable feeding pipe 43 is closed (as shown in fig. 13), so as to prevent the high-temperature gas in the furnace from leaking.

Example 8

The regions indicated by the dotted circles 33 and 34 in fig. 8 are replaced by the regions indicated by the dotted circles 41 and 42 in fig. 15 and 16, respectively, to form a double-furnace type powder flight gasification device, which comprises two gasification furnaces and a gasification agent preheating system the same as that in the embodiment 1, and is different in that:

the gasification furnace comprises a fuel feeding device 1, an air inlet 10, an air outlet 12, a feeding hole 13 and a fuel feeding pipeline 9; the fuel feeding pipeline 9 of the gasification furnace comprises an outlet end 15 and an inlet end 16, wherein the outlet end 15 is connected with the feeding hole 13 of the gasification furnace, and the inlet end 16 is communicated with the fuel feeding equipment 1 of the gasification furnace; the preheated gas outlet 19 is communicated with the gas inlet 10 of one gasification furnace, the fuel feeding equipment 1 of the gasification furnace is in a starting feeding state, the gas outlet 12 of the gasification furnace is communicated with the gas inlet 10 of the other gasification furnace through the gas flow channel 22, the fuel feeding equipment 1 of the other gasification furnace is in a stopping feeding state, and the gas outlet 12 of the other gasification furnace is communicated with the high-temperature gas inlet 20; the feed opening 13 is provided with a forced feeding device.

The forced feeding device (or the gate 32 in the embodiment 5) comprises a push rod 35, a rod containing cavity 36, a piston 37 and a driving mechanism 38 for pushing the piston 37 to reciprocate; the rod holding cavity 36 is connected with the inlet end 16 of the fuel feeding pipeline 9, and the outer diameter of the push rod 35 is matched with the inner diameter of the fuel feeding pipeline 9; the pushrod 35 includes a trailing end 39 and a leading end 40; the tail end 39 of the push rod 35 is connected with the piston 37, the top end 40 of the push rod 35 is pushed by the piston 37 to retreat into the rod containing cavity 36 when reaching the retraction end position of the reciprocating motion, and covers the feed port 13 when reaching the advancement end position of the reciprocating motion; the rear end 39 of the push rod 35 is located in the rod receiving chamber 36 when pushed by the piston 37 to the advanced end position of the reciprocating motion.

The above-mentioned forced feeding device is a device for pushing the pulverized solid fuel into the feed port 13 from the fuel feed pipe by a mechanical pushing force, and the pushing rod 35 can perform a continuous reciprocating motion to forcibly push the pulverized solid fuel entering the fuel feed pipe 9 from the inlet end 16 into the feed port 13.

Because the molten material is present on the inner wall 29 of the outlet end of the fuel feeding pipeline, the molten material is condensed and bonded, and the strength after condensation and bonding is extremely high, the molten material is difficult to remove, and the molten material is accumulated continuously to cause blockage. The push rod 35 can continuously force the powdery solid fuel and the melt to be pushed into the hearth 11 from the feed port 13, so that a small amount of melt adhered to the inner wall 29 can be removed in time, and the problem that the melt is difficult to remove after being condensed and adhered and causes blockage is avoided.

The above-described forced feeding device, which can easily perform the opening and closing action of the feed port 13 of the shutter 32 of embodiment 5, is a kind of shutter 32. As shown in FIG. 16, when feeding, the pushing rod 35 is pushed to reach the retracted end position, the top end 40 of the pushing rod 35 retreats into the rod containing cavity 36, and the inlet end 16 and the feeding hole 13 are opened; when the material is not required to be fed, the push rod 35 is pushed to the pushing end position, and the top end 40 of the push rod 35 covers the feed opening 13, closing the feed opening 13 and the inlet end 16, as shown in fig. 15.

Example 9

FIG. 17 shows a forced feeding apparatus, which is substantially the same as that of example 8 except that it is different from example 8 in that the forced feeding apparatus of the double furnace type powder flight gasification apparatus, which comprises a spring-like helical blade 67 and a shaft 68 which is mechanically driven to rotate, is composed by replacing the region indicated by the dotted circle 30 in FIG. 5 with the region indicated by the dotted circle 70 in FIG. 17; the helical blade 67 is located in the fuel feed pipe 9, the shaft 68 is located on the center line of the helical blade 67, and the shaft 68 is fixedly connected with the helical blade 67.

The mechanism for rotating the drive shaft 68 is a motor 69, and the shaft 68 is connected to the motor 69.

The forced feeding device is also a device which pushes the powdery solid fuel into the feeding hole 13 from the fuel feeding pipe by mechanical thrust, the rotation direction of the shaft 68 enables the helical blade 67 to push the powdery solid fuel to the feeding hole 13, and when the inner wall 29 of the outlet end of the fuel feeding pipe has melt, the helical blade 67 can force the powdery solid fuel and the melt to be pushed into the hearth 11 together, so that blockage can be avoided. The rotating helical blades 67 have a sweeping effect on the inner wall 29 of the outlet end of the raw material feeding pipe, and reduce the adhesion of powder on the inner wall.

In the above embodiment, the gas flow path 22 may be replaced with an adhesion separator disclosed in the invention of application No. 201510995749.9, which has a gas inlet and a gas outlet, and is capable of inputting the high-temperature gas carrying the molten dust from the gas inlet and outputting the purified high-temperature gas from the gas outlet, and therefore, the adhesion separator essentially has the function of allowing the high-temperature gas flow to pass through the gas flow path 22, and belongs to a gas flow path. The use of the above-described adhesive separator is very simple and is illustrated by example 10 below:

example 10

Referring to fig. 18, details of the area represented by the dashed circle 30 in fig. 18 refer to fig. 6. Fig. 18 shows a twin-furnace type powder flight gasification apparatus which is substantially the same in structure as that of embodiment 3 (fig. 5), except that this embodiment replaces the gas flow path 22 of embodiment 3 with an adhesion separator indicated by a dotted line box 71, the adhesion separator 71 of fig. 18 comprising a gas inlet 72 and a gas outlet 73, the gas inlet 72 communicating with the gas outlet 12 of one gasification furnace, and the gas outlet 73 communicating with the gas inlet 10 of the other gasification furnace.

In fig. 18, the adhesion separator 71 and the two gasifiers form a series structure, so that the molten dust in the high-temperature gas can be purified more thoroughly, the molten dust can be better prevented from entering a fuel feeding pipeline communicated with a feeding hole for stopping feeding, and the function of preventing or relieving blockage is achieved.

In the above embodiment, the gas exhaust device 7 may adopt an induced draft fan, and the gasifying agent input device 6 may adopt an air blower, and the difference between the suction force of the gas exhaust device 7 and the pressure of the gasifying agent input device 6 is adjusted, so that any value of the furnace pressure from the negative pressure to the positive pressure can be controlled; when the gas exhaust equipment 7 is a draught fan, an air inlet is arranged as gasification agent input equipment 6, and then external air can be input as a gasification agent; if the gasification agent input device 6 adopts a blower, the gas can be sent to a gas using point by only arranging an exhaust pipeline as the gas exhaust device 7; the gasification furnace also comprises a hearth 11 and a furnace wall 14, and the feed inlet 13, the air inlet 10 and the air outlet 12 are respectively arranged on the furnace wall 14; the fuel feeding device 1 is used for feeding powdery solid fuel into a hearth 11 through a feeding hole 13; the fuel feeding device 1 may adopt a device for feeding a powdery material such as an impeller feeder, a screw feeder, etc., or may use other conventional devices as long as it can feed the powdery solid fuel into the common feed pipe 17 or the inlet end 16 of the fuel feed pipe 9; the double-furnace type powder flight gasification device also comprises a liquid discharge port 2, wherein the liquid discharge port 2 is positioned at the bottom of the hearth 11 or near the bottom, and molten dust adhered to the furnace wall 14 flows to the liquid discharge port 2 under the action of gravity and is output; the hearth 11 is basically cylindrical, and the air inlet 10 and the air outlet 12 are respectively positioned near two ends of the cylindrical hearth 11 and are connected with the two ends in a tangent mode; the feed opening 13 is located substantially in the center of the top of the cylindrical furnace 11.

In the above embodiments, the pulverized solid fuel generally includes pulverized coal and pulverized biomass fuel. The gasifying agent comprises oxygen-containing gas and water vapor, the oxygen-containing gas comprises air and oxygen-enriched air, and if the heat value of the fuel gas needs to be improved, a mixed gas of oxygen and water vapor can also be used.

The present invention is not limited to the above-described embodiments. Appropriate changes and modifications to the embodiments described above will be apparent to those skilled in the art in light of the above disclosure and teachings, and are intended to be included within the scope of the invention as claimed. Certain terminology is used in the description for convenience only and is not limiting.

Claims

1. The utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers, fuel feeding equipment and gasification agent preheat the system, the gasification agent system of preheating includes two regenerators, two switching-over flashboards that admit air, two switching-over flashboards of giving vent to anger, gasification agent input device and gas exhaust equipment, its characterized in that: when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet; the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state; the gasification furnace comprises a feeding reversing gate, a fuel feeding pipeline, an air inlet, an air outlet and a feeding hole; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end of the fuel feeding pipeline is communicated with the feeding hole of the gasification furnace, and the inlet end of the fuel feeding pipeline is connected with a feeding reversing gate of the gasification furnace; the feeding reversing gates of the two gasification furnaces are respectively connected with fuel feeding equipment through a common feeding pipeline; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the feeding reversing gate of the gasification furnace is in an open state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the feeding reversing gate of the other gasification furnace is in a closed state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; and a purge gas input port is arranged on the common feed pipeline.

2. The utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers and gasification agent preheat the system, the gasification agent system of preheating includes two regenerators, two switching-over flashboards that admit air, two switching-over flashboards of giving vent to anger, gasification agent input device and gas outgoing device, its characterized in that: when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet; the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state; the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is communicated with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; and a scavenging gas inlet is arranged on the fuel feeding pipeline.

3. The utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers and gasification agent preheat the system, the gasification agent system of preheating includes two regenerators, two switching-over flashboards that admit air, two switching-over flashboards of giving vent to anger, gasification agent input device and gas outgoing device, its characterized in that: when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet; the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state; the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is communicated with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; a gate is arranged on the feeding hole; the gate on the feed inlet communicated with the fuel feeding equipment in the feeding starting state is in an opening state, and the gate on the feed inlet communicated with the fuel feeding equipment in the feeding stopping state is in a closing state.

4. The utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers and gasification agent preheat the system, the gasification agent system of preheating includes two regenerators, two switching-over flashboards that admit air, two switching-over flashboards of giving vent to anger, gasification agent input device and gas outgoing device, its characterized in that: when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet; the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state; the gasification furnace comprises fuel feeding equipment, a fuel feeding pipeline, a gas inlet, a gas outlet and a feeding hole; the fuel feeding pipeline is a movable feeding pipe, and the outlet end of the movable feeding pipe is movably connected with the feeding hole; the preheating gas outlet is communicated with a gas inlet of one gasification furnace, a feed inlet of the gasification furnace is communicated with fuel feeding equipment through a movable feed pipe, a gas outlet of the gasification furnace is communicated with a gas inlet of another gasification furnace through a gas flow channel, and a gas outlet of the other gasification furnace is communicated with a high-temperature gas inlet.

5. The double-furnace type powder flight gasification device of claim 4, characterized in that: the feed inlet of the other gasification furnace is disconnected with the outlet end of the movable feed pipe; and a gate is arranged on the feeding hole.

6. The utility model provides a double-furnace type powder flight gasification equipment, it includes that two gasifiers and gasification agent preheat the system, the gasification agent system of preheating includes two regenerators, two switching-over flashboards that admit air, two switching-over flashboards of giving vent to anger, gasification agent input device and gas outgoing device, its characterized in that: when one of the two heat storage chambers is used for preheating the gasification agent, the other heat storage chamber is used for cold confirmation of high-temperature fuel gas, the heat storage chamber used for preheating the gasification agent is provided with a gasification agent inlet and a preheating gas outlet, and the heat storage chamber used for cold confirmation of high-temperature fuel gas is provided with a high-temperature fuel gas inlet and a cold confirmation fuel gas outlet; the gasification agent input equipment is communicated with a gasification agent inlet through one air inlet reversing flashboard in an open state and is connected with a cold gas outlet through the other air inlet reversing flashboard in a closed state; the gas discharge equipment is communicated with the cold gas outlet through one gas outlet reversing flashboard in an open state and is connected with the gasification agent inlet through the other gas outlet reversing flashboard in a closed state; the gasification furnace comprises fuel feeding equipment, a gas inlet, a gas outlet, a feed inlet and a fuel feeding pipeline; the fuel feeding pipeline of the gasification furnace comprises an outlet end and an inlet end, wherein the outlet end is connected with the feeding hole of the gasification furnace, and the inlet end is communicated with the fuel feeding equipment of the gasification furnace; the preheating gas outlet is communicated with the gas inlet of one gasification furnace, the fuel feeding equipment of the gasification furnace is in a starting feeding state, the gas outlet of the gasification furnace is communicated with the gas inlet of the other gasification furnace through the gas flow channel, the fuel feeding equipment of the other gasification furnace is in a stopping feeding state, and the gas outlet of the other gasification furnace is communicated with the high-temperature gas inlet; a forced feeding device is arranged on the feeding hole; the forced feeding device is a device which pushes the pulverized solid fuel into the feed opening from the fuel feed pipe by mechanical thrust.

7. The double-furnace type powder flight gasification device of claim 6, characterized in that: the forced feeding equipment comprises a push rod, a rod containing cavity, a piston and a driving mechanism for pushing the piston to reciprocate; the rod accommodating cavity is connected with the inlet end of the fuel feeding pipeline, and the outer diameter of the push rod is matched with the inner diameter of the fuel feeding pipeline; the tail end of the push rod is connected with the piston, the top end of the push rod is pushed by the piston to retreat into the rod accommodating cavity when reaching the retraction end position of the reciprocating motion, and the feed port is covered when reaching the pushing end position of the reciprocating motion; the tail end of the push rod is positioned in the rod containing cavity when the tail end of the push rod is pushed by the piston to reach the pushing end position of the reciprocating motion.

8. The double-furnace type powder flight gasification device of claim 6, characterized in that: said positive feed means comprising a spring-like helical blade and a shaft which is mechanically driven to rotate; the helical blade is positioned in the fuel feeding pipeline, the shaft is positioned on the central line of the helical blade, and the shaft is fixedly connected with the helical blade.

9. The double-furnace type powder flight gasification device of claim 1 or 2, characterized in that: a purge gas input pipeline is connected to the purge gas input port; and a valve is arranged on the purge gas input pipeline.

10. The twin-furnace type powder flight gasification apparatus of any one of claims 1 to 8, wherein: the gas flow channel is an adhesive separator.