Iron bath gasifier system with pre-lead bismuth liquid cyclone pyrolysis furnace

Abstract

The present application relates to the molten iron bath gasification furnace system with the pre-lead bismuth liquid cyclone pyrolysis furnace, the scheme includes: the molten lead bismuth liquid is arranged in the lead bismuth liquid circulating pool, and stirring mechanism is arranged, the added organic solid waste is centrifuged with the molten lead bismuth liquid and simultaneously pyrolysis occurs, pyrolysis gas escapes and is collected, condensed and pressurized, and then enters the molten iron bath gasification furnace, and the pyrolysis residual solid floating on the lead bismuth liquid is lifted in the cyclone process and enters the molten iron bath gasification furnace, and the molten iron bath gasification furnace is further pyrolysis gasification in the molten iron liquid contained in the molten iron bath gasification furnace.The present application can realize efficient pyrolysis, so that the pre-pyrolysis link is matched with the final molten bath type gasification.

Description

Technical Field

[0001] This invention relates to the field of energy technology, and more specifically to a molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace. Background Technology

[0002] When solid waste is gasified through a molten iron bath, due to the wide variety of physical properties and large fluctuations in chemical composition of solid waste, a pre-pyrolysis process is often required. This process allows the organic solid waste to undergo low-temperature pyrolysis before the solid phase, pyrolysis liquid, and non-condensable gas obtained from the pyrolysis are fed into the molten pool gasifier for final stable conversion into syngas.

[0003] Currently, conventional pyrolysis processes and furnaces employ indirect heating methods via solid-phase heat conduction, resulting in pyrolysis of organic solid waste taking 40-400 minutes. In contrast, a high-efficiency molten pool gasifier achieves a gasification process in less than one second, meaning the upstream processes cannot meet the demands of the main process. A single gasifier can gasify hundreds of tons of material per hour, while conventional pyrolysis furnaces only achieve tons per hour, leading to a severe mismatch between the pace and capacity of pyrolysis.

[0004] Therefore, there is an urgent need for a liquid-phase heat transfer pre-pyrolysis system. This application adopts a molten iron bath gasification furnace system with a pre-lead-bismuth liquid cyclone pyrolysis furnace to solve the problems of slow pace, small capacity, and serious mismatch between pre-pyrolysis and final gasification in the current pyrolysis furnace. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: a molten iron bath gasification furnace system with a pre-positioned lead-bismuth liquid cyclone pyrolysis furnace includes:

[0007] A lead-bismuth liquid circulation tank contains molten lead-bismuth liquid and a stirring mechanism for stirring the lead-bismuth liquid to form a centrifugal vortex.

[0008] The feeding mechanism is used to feed organic solid waste into the lead-bismuth liquid circulation tank for pyrolysis to generate pyrolysis gas.

[0009] The pyrolysis gas recovery mechanism is connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation tank and is partially located outside the feeding mechanism. It is used to store pyrolysis gas in the pyrolysis gas temporary storage chamber and to preheat organic solid waste through heat exchange between the pyrolysis gas and the outer wall of the feeding mechanism.

[0010] The pyrolysis gas condensation and recovery mechanism is connected to the pyrolysis gas storage chamber. It is used to collect part of the pyrolysis liquid after the first condensation in the pyrolysis gas storage chamber, pressurize it and spray it into the molten pool gasification furnace. The remaining part of the pyrolysis gas is collected after secondary condensation and allowed to stand in layers for separate storage and recycling.

[0011] A lead-bismuth liquid settling tank is connected to the lead-bismuth liquid circulation tank and is equipped with a discharge mechanism for lifting and discharging pyrolysis residues floating on the surface of the lead-bismuth liquid circulation tank.

[0012] The gasifier feed hopper is used to receive the pyrolysis residue discharged by the discharge mechanism and pressurize it to send it into the molten pool gasifier;

[0013] The molten iron bath gasifier is connected to the gasifier feed hopper through an upper and lower immersion feeding pipe and is equipped with a molten iron bath containing molten iron. The pyrolysis residue, pyrolysis liquid and pyrolysis non-condensable gas are submerged and added to the molten iron bath to achieve complete pyrolysis-gasification and obtain syngas. The syngas is discharged through the syngas channel.

[0014] Syngas cooling and processing unit, connected to syngas channel, is used to cool syngas multiple times, store it separately, and finally filter and remove dust before outputting clean syngas at room temperature.

[0015] The lead-bismuth liquid pool heating chamber is equipped with a hot air inlet and a hot air outlet, and is used for indirect heating of the lead-bismuth liquid circulation pool and the lead-bismuth liquid settling pool.

[0016] Working principle and beneficial effects: 1. Compared with existing technologies, this application uses low-melting-point molten lead-bismuth alloy liquid as a heat carrier. Organic solid waste is added to the molten swirling lead-bismuth liquid at about 500℃ to undergo rapid pyrolysis. The pyrolysis residue floats on the surface of the lead-bismuth liquid and is conveyed in a sealed manner into the molten pool gasification furnace for pyrolysis-gasification using a spiral lifting and conveying mechanism. In this way, the time from the addition of organic solid waste to the completion of medium-low temperature pyrolysis is 10-30 seconds, which is greatly shortened compared to the original 40-400 minutes. This is due to the direct contact between the lead-bismuth liquid and the organic solid waste, and the heat exchange through convection. Moreover, the amount of lead-bismuth liquid accumulated and the amount of organic solid waste added per unit time can be flexibly adjusted, which greatly improves the pyrolysis efficiency.

[0017] 2. Compared with the prior art, the pyrolysis residual solids in the process of this application can be directly charged into the molten pool gasifier, which reduces heat loss. In this way, large-scale pretreatment can be achieved with a single pyrolysis furnace, and can be orderly connected and matched with the molten pool gasifier with a single furnace gasification capacity of 50-150 tons of solid waste per hour.

[0018] Furthermore, the pyrolysis gas recovery mechanism includes a pyrolysis gas flue located outside the feeding mechanism and connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation pool, a flue gas baffle for extending the pyrolysis gas discharge path and increasing the heat exchange time, and a drying gas channel for discharging drying gas. The top of the pyrolysis gas flue is connected to the pyrolysis gas temporary storage chamber. The pyrolysis gas recovery mechanism is also used to discharge the pyrolysis gas through the outer wall of the feeding mechanism for heat exchange, so that the organic solid waste in the feeding mechanism is preheated.

[0019] This setup effectively utilizes the heat from the pyrolysis gas, thereby significantly reducing heat loss, while ensuring sufficient heating to maintain a constant temperature in the lead-bismuth solution, thus reducing the use of external energy.

[0020] Furthermore, the feeding mechanism includes a feeding bin, a spiral feeding pipe connected to the feeding bin, a first spiral disposed inside the spiral feeding pipe, multiple heat exchange fins disposed on the outer wall of the spiral feeding pipe, and a drying gas manifold for collecting the moisture evaporated by the heated organic solid waste. The drying gas manifold is connected to a drying gas channel, and the spiral feeding pipe is provided with multiple moisture evaporation holes connected to the drying gas manifold.

[0021] This setup effectively evaporates moisture from organic solid waste and also enables preliminary preheating of the organic solid waste during the feeding process.

[0022] Furthermore, the pyrolysis gas condensation and recovery mechanism includes a pyrolysis oil condenser for the initial condensation of the pyrolysis gas discharged from the pyrolysis gas storage chamber, a pyrolysis oil pressurizing pump for pressurizing the pyrolysis liquid, a pyrolysis liquid nozzle for adding the pressurized pyrolysis liquid to the impregnation feed pipe, a pyrolysis mixed liquid condenser for the secondary condensation of the pyrolysis gas, a pyrolysis noncondensable gas booster pump for pressurizing the remaining pyrolysis gas, and a pyrolysis noncondensable gas storage tank for storing the pressurized remaining pyrolysis gas. The pyrolysis noncondensable gas storage tank adds the remaining pyrolysis gas to the molten pool gasifier through the noncondensable gas nozzle.

[0023] This setup effectively recycles pyrolysis gas, separating and temporarily storing the condensable and non-condensable portions before adding them to the molten pool gasifier. This significantly improves gasification efficiency, allowing the pyrolysis furnace to match the molten pool gasifier's operating rhythm.

[0024] Furthermore, the pyrolysis mixture condenser is also used to collect the mixture of pyrolysis liquid and water after secondary condensation and allow it to settle and separate into layers. The upper layer of pyrolysis liquid is sent to the pyrolysis mixture floating oil tank, and after being pressurized by the pyrolysis floating oil pressurization pump, it is added to the impregnation feed pipe through the pyrolysis oil spray pipe. The lower layer of aqueous phase is sent to the pyrolysis condensate tank and treated by the water treatment unit for recycling.

[0025] Furthermore, the lead-bismuth liquid settling tank is equipped with an isolation wall with multiple liquid passage holes to allow the lead-bismuth liquid to pass through and block pyrolysis residues. The discharge mechanism includes an inclined pyrolysis residue spiral lifting pipe, a second spiral inside the pyrolysis residue spiral lifting pipe, and multiple leakage holes on the pyrolysis residue spiral lifting pipe. The pyrolysis residues are lifted and discharged through the second spiral, and the lead-bismuth liquid entrained by the pyrolysis residues is recovered into the lead-bismuth liquid settling tank through the leakage holes.

[0026] Furthermore, the stirring mechanism includes a stirring impeller disposed in the lead-bismuth liquid circulation pool and a stirring motor for driving the stirring impeller. The stirring motor is located outside the lead-bismuth liquid circulation pool and is connected to the stirring impeller through a stirring shaft.

[0027] Furthermore, the heating chamber of the lead-bismuth liquid pool is equipped with multiple hot air baffles to extend the hot air flow path and increase the heat exchange time and heat exchange area.

[0028] Furthermore, a pyrolysis residue transition chamber is provided at the top of the gasifier feed hopper. A second upper locking valve is provided between the pyrolysis residue transition chamber and the gasifier feed hopper. The gasifier feed hopper is also connected to a second vacuum pump and a second high-pressure inert gas tank. The second vacuum pump evacuates the gasifier feed hopper through a second suction port. The second high-pressure inert gas tank fills the gasifier feed hopper with inert gas through a second filling valve and a filling port located on the gasifier feed hopper. A second lower locking valve is provided between the bottom of the gasifier feed hopper and the impregnation feeding pipe.

[0029] Furthermore, the syngas cooling and treatment mechanism includes a primary cooling dust removal chamber, a secondary cooling dust removal chamber, and a final cooling dust collector arranged sequentially along the syngas travel direction. The primary cooling dust removal chamber is equipped with a first locking hopper valve and a primary cooling ash collection tank at its bottom. The secondary cooling dust removal chamber is equipped with a second locking hopper valve and a secondary cooling ash collection tank at its bottom. The final cooling dust collector is equipped with a third locking hopper valve and a final cooling ash collection tank at its bottom. The final cooling dust collector is used to discharge clean, ambient temperature syngas, while the primary cooling ash collection tank, the secondary cooling ash collection tank, and the secondary cooling ash collection tank are used to periodically collect dust.

[0030] Furthermore, the feeding mechanism includes an upper locking hopper equipped with an upper locking valve, a first vacuum pump for evacuating the upper locking hopper through a first air intake port, a first high-pressure inert gas tank for filling the upper locking hopper with inert gas through a first air filling valve and a first air filling port, a lower locking hopper located below the upper locking hopper, and a first locking valve located between the upper locking hopper and the lower locking hopper. The bottom of the lower locking hopper is equipped with a spiral feeding pipe that communicates with the top center of the lead-bismuth liquid circulation pool. The spiral feeding pipe is equipped with a first spiral, and the bottom of the first spiral is connected to the stirring impeller of the stirring mechanism. The stirring impeller is driven to rotate by the first spiral, and organic solid waste is added into the lead-bismuth liquid circulation pool at the same time. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the lead-bismuth liquid cyclone pyrolysis furnace of the present invention;

[0032] Figure 2 yes Figure 1 AA section view in the middle;

[0033] Figure 3 This is a partial top view of the lead-bismuth liquid cyclone pyrolysis furnace of the present invention;

[0034] Figure 4This is a partial top view of another preferred lead-bismuth liquid cyclone pyrolysis furnace;

[0035] Figure 5 This is a partial left view of the lead-bismuth liquid cyclone pyrolysis furnace of the present invention;

[0036] Figure 6 This is a schematic diagram of the pyrolysis gas condensation process and flow direction of the present invention;

[0037] Figure 7 This is a schematic diagram of the molten pool gasification furnace of the present invention;

[0038] Figure 8 This is a schematic diagram of another preferred stirring mechanism;

[0039] Figure 9 yes Figure 8 Cross-sectional view of the middle section (BB).

[0040] In the diagram, 101 is the feeding hopper; 102 is the spiral feeding pipe; 103 is the first spiral; 104 is the pyrolysis gas flue; 105 is the drying gas passage; 106 is the moisture evaporation hole; 107 is the flue gas baffle; 108 is the heat exchange fins; 109 is the drying gas manifold; 120 is the pyrolysis gas storage chamber; 121 is the pyrolysis oil condenser; 122 is the pyrolysis oil pressurizing pump; 123 is the pyrolysis mixture condenser; 124 is the pyrolysis mixture floating oil tank; 125 is the pyrolysis floating oil pressurizing pump; 126 is the pyrolysis condensate tank; and 127 is the pyrolysis non-condensable gas booster. 128. Pressure pump; 130. Pyrolysis non-condensable gas storage tank; 145. Water treatment unit; 146. First air intake; 147. First vacuum pump; 148. First air filling port; 149. First air filling valve; 151. First high-pressure inert gas tank; 152. Upper lock hopper; 153. Lower lock hopper; 154. First upper lock hopper valve; 155. First lower lock hopper valve; 201. Lead-bismuth liquid circulation tank; 202. Lead-bismuth liquid settling tank; 203. Lead-bismuth liquid tank heating chamber; 204. Lead-bismuth liquid; 205. Stirring impeller; 206. Stirring shaft; 207. Stirring electric motor Machine; 208, Isolation wall; 209, Liquid passage hole; 220, Hot air baffle plate; 221, Hot air inlet; 222, Hot air outlet; 301, Pyrolysis residue; 302, Pyrolysis residue spiral lift pipe; 303, Second spiral; 304, Liquid leakage hole; 401, Pyrolysis residue transition chamber; 402, Gasifier feed hopper; 403, Second upper locking hopper valve; 404, Second lower locking hopper valve; 405, Air intake port; 406, Second vacuum pump; 407, Second air filling port; 408, Second air filling valve; 409, Second high-pressure inert gas pump 501. Impregnation feeder upper pipe; 502. Impregnation feeder lower pipe; 503. Molten pool gasifier; 504. Molten iron bath pool; 505. Oxygen lance; 506. Pyrolysis liquid nozzle; 507. Non-condensable gas nozzle; 508. Syngas passage; 509. Primary cooling dust removal chamber; 510. First locking hopper valve; 511. Primary cooling ash collection tank; 512. Secondary cooling dust removal chamber; 513. Second locking hopper valve; 514. Secondary cooling ash collection tank; 515. Final cooling dust collector; 516. Third locking hopper valve; 517. Final cooling ash collection tank; 518. Syngas user. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0042] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0043] Example 1

[0044] like Figure 1-7 As shown, this molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace includes:

[0045] Among them, the lead-bismuth liquid circulation tank 201 contains molten lead-bismuth liquid 204 at a temperature of about 500°C, and is equipped with a stirring mechanism for stirring the lead-bismuth liquid 204 to form a centrifugal vortex.

[0046] The stirring mechanism includes a stirring impeller 205 disposed in the lead-bismuth liquid circulation tank 201 and a stirring motor 207 for driving the stirring impeller 205. The stirring motor 207 is located outside the lead-bismuth liquid circulation tank 201 and is connected to the stirring impeller 205 through a stirring shaft 206.

[0047] The feeding mechanism is used to feed organic solid waste into the lead-bismuth liquid circulation tank 201 for pyrolysis to generate pyrolysis gas.

[0048] Preferably, such as Figure 1-4 As shown, the feeding mechanism includes a feeding bin 101, a spiral feeding pipe 102 connected to the feeding bin 101, a first spiral 103 disposed inside the spiral feeding pipe 102, a plurality of heat exchange fins 108 disposed on the outer wall of the spiral feeding pipe 102, and a drying gas manifold 109 for collecting the moisture evaporated by the heated organic solid waste. The drying gas manifold 109 is connected to the drying gas channel 105, and the spiral feeding pipe 102 is provided with a plurality of moisture evaporation holes 106 connected to the drying gas manifold 109.

[0049] in Figure 3 and Figure 4 In the middle, the direction of the feeding mechanism is different.

[0050] In another preferred embodiment, such as Figure 8 and Figure 9As shown, the feeding mechanism includes an upper locking hopper 151 equipped with an upper locking hopper 151 valve, a first vacuum pump 146 for evacuating the upper locking hopper 151 through a first air intake 145, a first high-pressure inert gas tank 149 for filling the upper locking hopper 151 with inert gas through a first air filling valve 148 and a first air filling port 147, a lower locking hopper 152 located below the upper locking hopper 151, and a first locking hopper valve 510 located between the upper locking hopper 151 and the lower locking hopper 152. The bottom of the lower locking hopper 152 is provided with a spiral feeding pipe 102 that communicates with the top center of the lead-bismuth liquid circulation pool 201. The spiral feeding pipe 102 is provided with a first spiral 103. The bottom of the first spiral 103 is connected to the stirring impeller 205 of the stirring mechanism. The first spiral 103 drives the stirring impeller 205 to rotate and simultaneously adds organic solid waste into the lead-bismuth liquid circulation pool 201.

[0051] Among them, such as Figure 1 and Figure 8 As shown, the pyrolysis gas recovery mechanism is connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation tank 201 and is partially located outside the feeding mechanism. It is used to store pyrolysis gas in the pyrolysis gas temporary storage chamber 120 and to preheat the organic solid waste through heat exchange between the pyrolysis gas and the outer wall of the feeding mechanism.

[0052] In this embodiment, the pyrolysis gas recovery mechanism includes a pyrolysis gas flue 104 located outside the feeding mechanism and connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation pool 201, a flue gas baffle 107 for extending the pyrolysis gas discharge path and increasing the heat exchange time, and a drying gas channel 105 for discharging drying gas. The top of the pyrolysis gas flue 104 is connected to the pyrolysis gas temporary storage chamber 120. The pyrolysis gas recovery mechanism is also used to discharge the pyrolysis gas through the outer wall of the feeding mechanism for heat exchange, so that the organic solid waste in the feeding mechanism is preheated.

[0053] The pyrolysis gas condensation and recovery mechanism is connected to the pyrolysis gas storage chamber 120. It is used to collect part of the pyrolysis liquid after the first condensation in the pyrolysis gas storage chamber 120, pressurize it and spray it into the molten pool gasifier 503. The remaining part of the pyrolysis gas is collected after secondary condensation and allowed to stand in layers for separate storage and recycling.

[0054] In this embodiment, the pyrolysis gas condensation and recovery mechanism includes a pyrolysis oil condenser 121 for the initial condensation of pyrolysis gas discharged from the pyrolysis gas storage chamber 120, a pyrolysis oil pressurizing pump 122 for pressurizing the pyrolysis liquid, a pyrolysis liquid nozzle 506 for adding the pressurized pyrolysis liquid to the impregnation feed pipe 502, a pyrolysis mixture condenser 123 for the secondary condensation of pyrolysis gas, a pyrolysis non-condensable gas booster pump 127 for pressurizing the remaining pyrolysis gas, and a pyrolysis non-condensable gas storage tank 1 for storing the pressurized remaining pyrolysis gas. 28. The pyrolysis non-condensable gas storage tank 128 adds the remaining pyrolysis gas to the molten pool gasifier 503 through the non-condensable gas nozzle 507. The molten iron in the molten iron bath 504 in the molten pool gasifier 503 has a temperature of 1350-1500℃, which can completely pyrolyze the submerged solid carbon, organic gas and organic liquid. Under the action of oxygen blowing, the organic matter is partially oxidized into synthesis gas composed of CO / CO2 and H2 / H2O (water vapor). At the same time, the inorganic inert substances are also in a molten state at this temperature.

[0055] Preferably, the pyrolysis mixture condenser 123 is also used to collect the mixture of pyrolysis liquid and water after secondary condensation and allow it to stand and separate into layers. The upper layer of pyrolysis liquid is sent to the pyrolysis mixture floating oil tank 124 and pressurized by the pyrolysis floating oil pressurizing pump 125 and added to the impregnation feed pipe 502 through the pyrolysis oil spray pipe. The lower layer of water phase is sent to the pyrolysis condensate tank 126 and treated by the water treatment unit 130 for recycling.

[0056] The lead-bismuth liquid settling tank 202 is connected to the lead-bismuth liquid circulation tank 201 and is equipped with a discharge mechanism for lifting and discharging the pyrolysis residue 301 floating on the surface of the lead-bismuth liquid circulation tank 201.

[0057] In this embodiment, the lead-bismuth liquid settling tank 202 is provided with an isolation wall 208, which has multiple liquid passage holes 209 to allow the lead-bismuth liquid 204 to pass through and block the pyrolysis residue 301. The discharge mechanism includes an inclined pyrolysis residue spiral lifting pipe 302, a second spiral 303 disposed in the pyrolysis residue spiral lifting pipe 302, and multiple leakage holes 304 disposed on the pyrolysis residue spiral lifting pipe 302. The pyrolysis residue 301 is lifted and discharged through the second spiral 303, and the lead-bismuth liquid 204 entrained by the pyrolysis residue 301 is recovered into the lead-bismuth liquid settling tank 202 through the leakage holes 304.

[0058] Among them, the gasifier feed hopper 402 is used to receive the pyrolysis residue 301 discharged by the discharge mechanism and pressurize it to be fed into the molten pool gasifier 503.

[0059] Preferably, the top of the gasifier feed hopper 402 is provided with a pyrolysis residue transition chamber 401, and a second locking hopper valve 403 is provided between the pyrolysis residue transition chamber 401 and the gasifier feed hopper 402. The gasifier feed hopper 402 is also connected to a second vacuum pump 406 and a second high-pressure inert gas tank 409. The second vacuum pump 406 evacuates the gasifier feed hopper 402 through the second suction port 405, and the second high-pressure inert gas tank 409 fills the gasifier feed hopper 402 with inert gas through the second filling valve 408 and the filling port located on the gasifier feed hopper 402. A second lower locking hopper valve 404 is provided between the bottom of the gasifier feed hopper 402 and the impregnation feeding pipe 501.

[0060] The molten iron bath gasifier 503 is connected to the gasifier feed hopper 402 through the immersion feeding upper pipe 501 and the immersion feeding lower pipe 502, and is equipped with a molten iron bath 504 containing molten iron. The pyrolysis residue 301, pyrolysis liquid and pyrolysis non-condensable gas are immersed in the molten iron bath 504 to achieve complete pyrolysis-gasification and obtain syngas. The syngas is discharged through the syngas channel 508.

[0061] The syngas cooling treatment mechanism is connected to the syngas channel 508 and is used to cool the syngas multiple times, store it separately, and finally filter and remove dust before outputting clean room temperature syngas to the syngas user 518.

[0062] In this embodiment, the syngas cooling treatment mechanism includes a primary cooling dust removal chamber 509, a secondary cooling dust removal chamber 512, and a final cooling dust collector 515 arranged sequentially along the syngas travel direction. The primary cooling dust removal chamber 509 is provided with a first locking valve 510 and a primary cooling ash collection tank 511 at its bottom. The secondary cooling dust removal chamber 512 is provided with a second locking valve 513 and a secondary cooling ash collection tank 514 at its bottom. The final cooling dust collector 515 is provided with a third locking valve 516 and a final cooling ash collection tank 517 at its bottom. The final cooling dust collector 515 is used to discharge clean, ambient temperature syngas. The primary cooling ash collection tank 511, the secondary cooling ash collection tank 514, and the secondary cooling ash collection tank 515 are used to periodically collect dust.

[0063] The lead-bismuth liquid pool heating chamber 203 is equipped with a hot air inlet 221 and a hot air outlet 222, which are used to indirectly heat the lead-bismuth liquid circulation pool 201 and the lead-bismuth liquid settling pool 202.

[0064] Preferably, the lead-bismuth liquid pool heating chamber 203 is provided with multiple hot air baffles 220 to extend the hot air flow path and increase the heat exchange time and heat exchange area.

[0065] Example 2

[0066] This embodiment is based on Implementation 1 and is used to demonstrate the process flow of this application.

[0067] like Figure 1-7As shown, in step one, organic solid waste is added from the feeding bin 101 and falls into the spiral feeding pipe 102. Pushed downwards by the first spiral 103, it moves downwards within the spiral feeding pipe 102 and falls into the lead-bismuth solution 204 in the lead-bismuth solution circulation tank 201. The lead-bismuth solution temperature is 500 degrees Celsius. The lead-bismuth solution 204 rotates at a certain angular velocity under the agitation of the stirring impeller 205. The driving force for the rotation of the stirring impeller 205 is achieved by the stirring motor 207 through the stirring shaft 206. The upper part of the stirring shaft 206 and the stirring motor 207 are located outside the lead-bismuth solution circulation tank 201. Organic solid waste falling into the lead-bismuth liquid pool undergoes pyrolysis upon heating. The pyrolysis gas moves outward along the pyrolysis gas flue 104, passing through the baffle plate 107 and contacting the wall of the spiral feed pipe 102 and the heat exchange fins 108 outside the spiral feed pipe 102 for heat exchange. This preheats the subsequently added organic solid waste, and moisture evaporates from the moisture evaporation holes 106, collecting in the drying gas manifold 109 and exiting from the drying gas channel 105. The pyrolysis gas enters the pyrolysis gas storage chamber 120 from the pyrolysis gas flue 104 for temporary storage.

[0068] Step 2: After passing through the pyrolysis gas storage chamber 120, the pyrolysis gas is initially condensed to 150°C. The condensed pyrolysis liquid drips and collects in the pyrolysis oil condenser 121. After being pressurized by the pyrolysis oil pressurization pump 122, it is added to the impregnation feed pipe 502 through the pyrolysis liquid nozzle 506 and enters the depth of the molten iron bath 504 in the molten pool gasifier 503. Similarly, the secondary condensation temperature is 50°C. The pyrolysis liquid, which is an oil-water mixture, condenses and drips and collects in the pyrolysis mixture condenser 123. After settling and stratification, the upper oil layer enters the pyrolysis mixture floating oil tank 124. After being pressurized by the pyrolysis floating oil pressurization pump 125, it is sprayed into the impregnation feed pipe 502 of the molten pool gasifier through the pyrolysis liquid nozzle 506 for gasification. The stratified aqueous phase enters the water treatment unit 130 from the pyrolysis condensate tank 126. The pyrolysis gas is pressurized by the pyrolysis noncondensable gas booster pump 127 and enters the pyrolysis noncondensable gas storage tank 128, and then added to the molten pool gasifier 503 through the noncondensable gas nozzle 507.

[0069] Step 3: The pyrolysis residue 301 remaining in the lead-bismuth liquid circulation pool 201 consists of residual carbon and inorganic inert ash. It floats on the surface of the lead-bismuth liquid circulation pool 201 and enters the lead-bismuth liquid settling pool 202 as the liquid swirls throughout the pool. The swirl is blocked by the isolation wall 208, which has many through-holes 209, allowing the lead-bismuth liquid 204 to pass through. The floating carbon residue remains on one side of the surface of the lead-bismuth liquid settling pool 202, near the lower port of the pyrolysis residue spiral lift pipe 302. It is driven upward by the second spiral 303 and seeps through the leakage hole 304 to carry the entrained lead-bismuth liquid. Finally, it falls into the pyrolysis residue transition chamber 401 at the upper port of the pyrolysis residue spiral lift pipe 302.

[0070] The lead-bismuth liquid circulation tank 201 and the lead-bismuth liquid settling tank 202 are both located inside the lead-bismuth liquid heating chamber 203. The lead-bismuth liquid heating chamber 203 is equipped with a hot air inlet 221 and a hot air outlet 222. Hot air with a temperature higher than 500 degrees Celsius enters from the hot air inlet 221 and indirectly transfers heat to the lead-bismuth liquid through the outer walls of the lead-bismuth liquid circulation tank 201 and the lead-bismuth liquid settling tank 202 to supplement the heat absorbed by the pyrolysis of organic matter and the heating of materials. Finally, the hot air is discharged from the hot air outlet 222. Multiple hot air baffles 220 are installed in the lead-bismuth liquid heating chamber 203 and welded to the outer walls of the lead-bismuth liquid circulation tank 201 and the lead-bismuth liquid settling tank 202, so that the hot air stays in the lead-bismuth liquid heating chamber 203 for a longer time, increasing the heat exchange area and fully heating to maintain a constant temperature of the lead-bismuth liquid.

[0071] Step 4: The pyrolysis carbon slag enters the pyrolysis residue transition chamber 401. The second upper locking hopper valve 403 is opened, allowing the pyrolysis carbon slag to enter the gasifier feed hopper 402. Inert gas CO2 from the second high-pressure inert gas tank 409 enters the second charging port 407 through the opened second charging valve 408 and is charged into the gasifier feed hopper 402. After the pressure is balanced with the impregnation feeding pipe 501, the second lower locking hopper valve 404 is opened, allowing the carbon slag to fall into the impregnation feeding pipe 501. Then, the second lower locking hopper valve 404 is quickly closed, and the second vacuum pump 406 is started to extract air through the second suction port 405, reducing the air pressure in the gasifier feed hopper 402 to balance with the pyrolysis residue transition chamber 401. Then, the second upper locking hopper valve 403 is opened to receive the next batch of pyrolysis carbon slag falling into the pyrolysis residue transition chamber 401.

[0072] Step 5: In the molten pool gasification furnace 503, solid carbon slag falling from the upper impregnation feeding pipe 501 falls onto the surface of the molten iron bath 504 through the lower impregnation feeding pipe 502. Oxygen is blown in by the oxygen lance 505, pyrolysis liquid is injected by the pyrolysis liquid nozzle 506, and pressurized pyrolysis non-condensable gas is blown in by the non-condensable gas nozzle 507. The pyrolysis and gasification continue to occur in the cavity of the lower impregnation feeding pipe 502. Finally, the molten iron bath and slag liquid in the molten iron bath 504, which reaches a temperature of up to 1500 degrees Celsius, are washed to obtain high-temperature crude synthesis gas composed of CO, H2, CO2, and water vapor. The gas is discharged through the synthesis gas channel 508 and enters the primary cooling dust removal chamber 509 for cooling and dust removal. The dust accumulates at the bottom of the primary cooling dust removal chamber 509. The first lock hopper valve 510 is opened periodically to allow the primary cooling dust to enter the primary cooling ash collection tank 511. The pre-purified and cooled syngas continues along the pipeline, undergoing a second cooling and dust removal process in the secondary cooling and dust removal chamber 512. The secondary dust settles at the bottom of the chamber, and the second locking valve 513 periodically opens, allowing the secondary dust to fall into the secondary cooling ash collection tank 514. After a third final cooling process in the final cooling dust collector 515, the clean, ambient-temperature syngas is delivered to the syngas user 518. A small amount of dust discharged from the final cooling dust collector 515 is periodically discharged into the final cooling ash collection tank 517 via the third locking valve 516.

[0073] In another technical solution for the feeding mechanism, such as Figure 8 As shown, the first spiral 103 and the stirring impeller 205 are coaxially arranged. The lower end of the spiral feed pipe 102 extends deep into the lead-bismuth liquid. Further down is the first spiral 103, which is no longer wrapped by the spiral feed pipe 102, and the lowest drying gas channel 105. When the first upper locking hopper valve 153 is opened, the material falls into the upper locking hopper 151. The first high-pressure inert gas tank 149 pressurizes the upper locking hopper 151 to a pressure higher than that above the lead-bismuth liquid 204 through the first inflation valve 148 and the first inflation port 147. Then, the first lower locking hopper valve 154 is opened to let the material fall into the lower locking hopper 152. The first lower locking hopper valve 154 is then closed. Under the action of the first spiral 103, the material rotates downwards and is eventually squeezed out of the spiral feed pipe 102 at its lower end, entering the lead-bismuth liquid 204. Upon heating, it undergoes pyrolysis and rises to the surface of the lead-bismuth liquid 204, swirling with the entire molten pool. The pyrolysis carbon residue is lifted away from the lead-bismuth liquid 204 by the second spiral 303. After closing the first lower locking hopper valve 154, the first vacuum pump 146 is immediately started, and a vacuum is drawn into the upper locking hopper 151 through the first suction port 145. Once the predetermined vacuum level is reached, the above operation of pressurizing the upper locking hopper 151 through the first inflation valve 148 and the first inflation port 147 is repeated, so that the inert gas inside the upper locking hopper 151 is balanced with the external pressure, thus achieving the feeding operation. This balanced pressure feeding process is a routine operation for adding solid materials to vacuum and pressurized chemical and metallurgical reactors.

[0074] The parts of this invention not described in detail are prior art, therefore they are not described in detail here.

[0075] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0076] Although this paper extensively uses the following components: feeding bin 101, spiral feeding pipe 102, first spiral 103, pyrolysis gas flue 104, drying gas channel 105, moisture evaporation hole 106, flue gas baffle 107, heat exchange fins 108, drying gas manifold 109, pyrolysis gas storage chamber 120, pyrolysis oil condenser 121, pyrolysis oil pressurizing pump 122, pyrolysis mixture condenser 123, pyrolysis mixture floating oil tank 124, pyrolysis floating oil pressurizing pump 125, pyrolysis condensate tank 126, and pyrolysis non-condensable gas booster pump. 127. Pyrolysis non-condensable gas storage tank; 128. Water treatment unit; 130. First air intake port; 145. First vacuum pump; 146. First air filling port; 147. First air filling valve; 148. First high-pressure inert gas tank; 149. Upper locking hopper; 151. Lower locking hopper; 152. First upper locking hopper valve; 153. First lower locking hopper valve; 154. Lead-bismuth liquid circulation tank; 201. Lead-bismuth liquid settling tank; 202. Lead-bismuth liquid tank heating chamber; 203. Lead-bismuth liquid; 204. Stirring impeller; 205. Stirring shaft; 206. Stirring motor; 207. Isolation wall 2 08. Liquid passage hole 209. Hot air baffle plate 220. Hot air inlet 221. Hot air outlet 222. Pyrolysis residue 301. Pyrolysis residue spiral lift pipe 302. Second spiral 303. Liquid leakage hole 304. Pyrolysis residue transition chamber 401. Gasifier feed hopper 402. Second upper locking hopper valve 403. Second lower locking hopper valve 404. Air intake port 405. Second vacuum pump 406. Second air filling port 407. Second air filling valve 408. Second high-pressure inert gas tank 409. Impregnation feeding pipe 50 1. The terms used include: 502. Impregnation feed pipe; 503. Molten pool gasifier; 504. Molten iron bath pool; 505. Oxygen lance; 506. Pyrolysis liquid nozzle; 507. Non-condensable gas nozzle; 508. Syngas passage; 509. Primary cooling dust removal chamber; 510. First locking hopper valve; 511. Primary cooling ash collection tank; 512. Second cooling dust removal chamber; 513. Second cooling ash collection tank; 514. Final cooling dust collector; 515. Third locking hopper valve; 516. Final cooling ash collection tank; 517. Syngas user; etc. However, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

[0077] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this invention.

Claims

1. A molten iron bath gasification furnace system with a pre-positioned lead-bismuth liquid cyclone pyrolysis furnace, characterized in that, include: A lead-bismuth liquid circulation tank contains molten lead-bismuth liquid and a stirring mechanism for stirring the lead-bismuth liquid to form a centrifugal vortex. The feeding mechanism is used to feed organic solid waste into the lead-bismuth liquid circulation tank for pyrolysis to generate pyrolysis gas. The pyrolysis gas recovery mechanism is connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation tank and is partially located outside the feeding mechanism. It is used to store the pyrolysis gas in the pyrolysis gas temporary storage chamber and to preheat the organic solid waste through heat exchange between the pyrolysis gas and the outer wall of the feeding mechanism. The pyrolysis gas condensation and recovery mechanism is connected to the pyrolysis gas storage chamber. It is used to collect part of the pyrolysis liquid after the first condensation in the pyrolysis gas storage chamber, pressurize it and spray it into the molten pool gasification furnace. The remaining part of the pyrolysis gas is collected after secondary condensation and allowed to stand in layers for separate storage and recycling. A lead-bismuth liquid settling tank is connected to the lead-bismuth liquid circulation tank and is equipped with a discharge mechanism for lifting and discharging pyrolysis residues floating on the surface of the lead-bismuth liquid circulation tank. The gasifier feed hopper is used to receive the pyrolysis residue discharged by the discharge mechanism and pressurize it to feed it into the molten pool gasifier; The molten iron bath gasifier is connected to the gasifier feed hopper via an upper and lower immersion feeding pipe and is equipped with a molten iron bath containing molten iron. The pyrolysis residue, pyrolysis liquid, and pyrolysis non-condensable gas are submerged and added to the molten iron bath to achieve complete pyrolysis-gasification and obtain syngas. The syngas is discharged through the syngas channel. A syngas cooling and processing unit, connected to the syngas channel, is used to cool the syngas multiple times, store it separately, and finally filter and remove dust before outputting clean syngas at room temperature. The lead-bismuth liquid pool heating chamber is equipped with a hot air inlet and a hot air outlet for indirectly heating the lead-bismuth liquid circulation pool and the lead-bismuth liquid settling pool.

2. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The pyrolysis gas recovery mechanism includes a pyrolysis gas flue located outside the feeding mechanism and connected to the pyrolysis gas outlet of the lead-bismuth liquid circulation pool, a flue gas baffle for extending the pyrolysis gas discharge path and increasing the heat exchange time, and a drying gas channel for discharging drying gas. The top of the pyrolysis gas flue is connected to the pyrolysis gas storage chamber. The pyrolysis gas recovery mechanism is also used to discharge the pyrolysis gas through the outer wall of the feeding mechanism for heat exchange, so that the organic solid waste in the feeding mechanism is preheated.

3. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 2, characterized in that, The feeding mechanism includes a feeding bin, a spiral feeding pipe connected to the feeding bin, a first spiral disposed inside the spiral feeding pipe, multiple heat exchange fins disposed on the outer wall of the spiral feeding pipe, and a drying gas manifold for collecting the moisture evaporated from the escaped organic solid waste by heating. The drying gas manifold is connected to the drying gas channel, and the spiral feeding pipe is provided with multiple moisture evaporation holes connected to the drying gas manifold.

4. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The pyrolysis gas condensation and recovery mechanism includes a pyrolysis oil condenser for the initial condensation of the pyrolysis gas discharged from the pyrolysis gas storage chamber, a pyrolysis oil pressurizing pump for pressurizing the pyrolysis liquid, a pyrolysis liquid nozzle for adding the pressurized pyrolysis liquid to the impregnation feeding pipe, a pyrolysis mixed liquid condenser for the secondary condensation of the pyrolysis gas, a pyrolysis noncondensable gas booster pump for pressurizing the remaining pyrolysis gas, and a pyrolysis noncondensable gas storage tank for storing the pressurized remaining pyrolysis gas. The pyrolysis noncondensable gas storage tank adds the remaining pyrolysis gas to the molten pool gasifier through the noncondensable gas nozzle.

5. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 4, characterized in that, The pyrolysis mixture condenser is also used to collect the mixture of pyrolysis liquid and water after secondary condensation and allow it to settle and separate into layers. The upper layer of pyrolysis liquid is sent to the pyrolysis mixture floating oil tank and pressurized by the pyrolysis floating oil pressurization pump and added to the impregnation feed pipe through the pyrolysis liquid spray pipe. The lower layer of aqueous phase is sent to the pyrolysis condensate tank and treated by the water treatment unit for recycling.

6. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The lead-bismuth liquid settling tank is equipped with an isolation wall with multiple liquid passage holes to allow the lead-bismuth liquid to pass through and block pyrolysis residues. The discharge mechanism includes an inclined pyrolysis residue spiral lifting pipe, a second spiral inside the pyrolysis residue spiral lifting pipe, and multiple leakage holes on the pyrolysis residue spiral lifting pipe. The pyrolysis residues are lifted and discharged through the second spiral, and the lead-bismuth liquid entrained in the pyrolysis residues is recovered into the lead-bismuth liquid settling tank through the leakage holes. The stirring mechanism includes a stirring impeller inside the lead-bismuth liquid circulation tank and a stirring motor for driving the stirring impeller. The stirring motor is located outside the lead-bismuth liquid circulation tank and is connected to the stirring impeller through a stirring shaft.

7. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The heating chamber of the lead-bismuth liquid pool is equipped with multiple hot air baffles to extend the hot air flow path and increase the heat exchange time and heat exchange area.

8. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The top of the gasifier feed hopper is provided with a pyrolysis residue transition chamber. A second upper locking valve is provided between the pyrolysis residue transition chamber and the gasifier feed hopper. The gasifier feed hopper is also connected to a second vacuum pump and a second high-pressure inert gas tank. The second vacuum pump evacuates the gasifier feed hopper through a second suction port. The second high-pressure inert gas tank fills the gasifier feed hopper with inert gas through a second filling valve and a filling port located on the gasifier feed hopper. A second lower locking valve is provided between the bottom of the gasifier feed hopper and the impregnation feeding pipe.

9. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The syngas cooling and treatment mechanism includes a primary condensate dust removal chamber, a secondary condensate dust removal chamber, and a final condensate dust collector arranged sequentially along the syngas travel direction. The primary condensate dust removal chamber is equipped with a first locking valve and a primary condensate dust collection tank at its bottom. The secondary condensate dust removal chamber is equipped with a second locking valve and a secondary condensate dust collection tank at its bottom. The final condensate dust collector is equipped with a third locking valve and a final condensate dust collection tank at its bottom. The final condensate dust collector is used to discharge clean, ambient temperature syngas. The primary condensate dust collection tank, the secondary condensate dust collection tank, and the secondary condensate dust collection tank are used to periodically collect dust.

10. The molten iron bath gasification furnace system with a pre-loaded lead-bismuth liquid cyclone pyrolysis furnace according to claim 1, characterized in that, The feeding mechanism includes a locking hopper with a locking valve, a first vacuum pump for evacuating the locking hopper through a first suction port, a first high-pressure inert gas tank for filling the locking hopper with inert gas through a first inflation valve and a first inflation port, a lower locking hopper located below the locking hopper, and a first locking valve located between the upper and lower locking hoppers. The bottom of the lower locking hopper is provided with a spiral feeding pipe that communicates with the top center of the lead-bismuth liquid circulation pool. The spiral feeding pipe contains a first spiral, and the bottom of the first spiral is connected to the stirring impeller of the stirring mechanism. The stirring impeller is driven to rotate by the first spiral, and organic solid waste is added into the lead-bismuth liquid circulation pool at the same time.

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