Immersion tube feeding type organic solid waste molten iron bath gasification device

Abstract

The present invention discloses an immersion tube feeding type organic solid waste molten iron bath gasification device, comprising: a gasifier, wherein a molten iron bath is contained inside, and a slag bath floats on the molten iron bath; at least one immersion tube, the lower end of any immersion tube is immersed in the molten iron bath, and the upper end passes through the gasifier and extends to the top of the gasifier; at least one charging lock hopper, one charging lock hopper is correspondingly arranged for one immersion tube, the top of any charging lock hopper is connected to the bottom of the lower feed bin located above, and the bottom is connected to the top of the corresponding immersion tube, and a feeding valve is arranged on the top of any charging lock hopper, and a discharge valve is arranged on the bottom. The present invention can directly put solid materials such as blocky or irregularly shaped energetic garbage solid waste into the gasifier for gasification treatment, so that the versatility and universality of the organic solid waste molten iron bath gasification device are greatly improved, and at the same time, it can also effectively reduce the workload of material pretreatment and the processing cost of materials before entering the furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, and more specifically to an immersion tube feeding type organic solid waste molten iron bath gasification device. Background Art

[0002] In terms of garbage solid waste and biomass waste treatment, compared with traditional processes, the iron bath is a more advanced process for converting hazardous waste into low-carbon energy. The iron bath is to spray organic solid waste particles into the molten bath at high speed, and blow in gasifying agents such as pure oxygen for thorough treatment and conversion, converting hydrocarbon elements into clean synthesis gas (carbon monoxide and hydrogen), which can be used as fuel gas and can also be used for chemical synthesis, such as methanation to produce natural gas, Fischer-Tropsch synthesis to produce gasoline and diesel, etc., while most of the inorganic matter remains in the slag floating on the surface, achieving reduction and harmless treatment.

[0003] Invention patent 201910827041.0 and utility model 201921452122.9 applied for on the same day disclose a double-melting bath organic solid waste injection gasification device, which utilizes a molten iron bath to gasify garbage solid waste and biomass waste, and adopts an immersed metallurgical spray gun and a carrier gas as the power to spray granular and powdered solid waste materials to be gasified into the molten iron liquid and the molten slag liquid to obtain synthesis gas.

[0004] However, in actual production, mixed "high entropy" solid waste composed of various sources and types of garbage is not easy to break and crush to a certain particle size, and become a brittle material suitable for injection like coal particles and coal powder. In most cases, the high molecular polymers in garbage solid waste are often thin, flexible, elastic, tough, thin films, bags, fibers, fabrics, sticky, and bubbling in physical form, which are difficult to process and crush. Taking waste plastics as an example, thermosetting waste plastics are easier to break, while thermoplastic waste plastics are more difficult. Rubber, sponge, etc. are also difficult to crush into a state similar to coal particles and coal powder that can be injected. In addition, garbage and industrial solid waste are often compressed and packaged when leaving the factory, and bundled into mixed packages of certain specifications. It is time-consuming, labor-intensive, and inefficient to continue unpacking, crushing, sorting, and crushing.

[0005] The advantage of the molten iron bath in treating solid waste, especially highly mixed "high entropy solid waste", is that it is "not picky" about its chemical composition and characteristics, and can directly treat both organic and inorganic matter. Organic matter, whether it is polymer or biomass; inorganic matter, whether it is glass, metal, or ash, can all be directly put into the furnace. This advantage of "not being picky" about chemical composition will be greatly reduced if it is subject to strict restrictions on the physical form of solid materials. Summary of the invention

[0006] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0007] Another object of the present invention is to provide an immersion tube feeding type organic solid waste molten iron bath gasification device, which can directly feed blocky or irregularly shaped solid materials into the gasification furnace for gasification treatment, thereby greatly improving the versatility and universality of the organic solid waste molten iron bath gasification device, and at the same time can also effectively reduce the workload and processing costs of material pretreatment.

[0008] In order to achieve these purposes and other advantages according to the present invention, an immersion tube feeding type organic solid waste molten iron bath gasification device is provided, comprising:

[0009] A gasifier, wherein a molten iron bath is contained in the gasifier, a molten slag bath floats on the molten iron bath, and a gas outlet is provided on the top of the gasifier;

[0010] At least one immersion pipe, the lower end of any immersion pipe is immersed in the molten iron bath, the upper end passes through the gasifier and extends to the top of the gasifier, the upper end of the immersion pipe is connected to the feeding mechanism, and the inside of the immersion pipe is connected to the oxygenation mechanism.

[0011] Preferably, the gasifier also contains molten bismuth liquid, and the molten bismuth liquid is located below the molten iron bath; the immersion tube feeding type organic solid waste molten iron bath gasification device also includes at least one spraying mechanism, and one immersion tube is correspondingly provided with one spraying mechanism, and any spraying mechanism includes at least one bismuth liquid nozzle arranged on the inner side wall of the immersion tube corresponding thereto, and the liquid inlet end of any bismuth liquid nozzle is connected to the bottom of the gasifier, and the liquid outlet end is connected to the upper part of the immersion tube corresponding thereto.

[0012] Preferably, any spray mechanism further comprises:

[0013] a low-level bismuth liquid storage tank, which is located below the gasifier, and is connected to the bottom of the gasifier through a first pipeline, and a first valve is provided on the first pipeline; and a top of the low-level bismuth liquid storage tank is connected to a pressure relief mechanism;

[0014] A boosting pipe, one end of which is connected to the top of the low-level bismuth liquid storage tank, and the other end of which is connected to the gas outlet end of the gas boosting mechanism;

[0015] A riser, the lower end of which is connected to the low-level bismuth liquid storage tank, and the upper end of which is connected to the liquid inlet end of any bismuth liquid nozzle.

[0016] Preferably, any spray mechanism further comprises:

[0017] A high-level bismuth liquid storage tank is arranged above the low-level bismuth liquid storage tank and is located between the upper end of the lifting pipe and any bismuth liquid nozzle. The top of the high-level bismuth liquid storage tank is connected with the upper end of the lifting pipe, and the bottom is connected with any bismuth liquid nozzle through a second pipeline. The lifting pipe is provided with a second valve, and the second pipeline is provided with a third valve.

[0018] Preferably, any first pipeline is provided with a cooling jacket, which is located between an end of the first pipeline close to the gasifier and the first valve.

[0019] Preferably, the lower portion of the gasifier is an inverted cone structure, and an induction heating mechanism is provided at the lower portion of the gasifier.

[0020] Preferably, it further comprises a synthesis gas pipeline, one end of which is connected to the gas outlet, and the other end of which is connected to the synthesis gas storage tank.

[0021] Preferably, the feeding mechanism includes a lower feeding bin and at least one feeding lock hopper, the lower feeding bin is arranged above any immersion pipe, and one feeding lock hopper is arranged corresponding to one immersion pipe. The top of any feeding lock hopper is connected with the bottom of the lower feeding bin, and the bottom is connected with the top of the immersion pipe corresponding thereto. A feeding valve is provided at the top of any feeding lock hopper, and a discharging valve is provided at the bottom; any feeding lock hopper is connected with the inert gas pressure tank and the vacuum mechanism.

[0022] Preferably, the air extraction mechanism includes a cooling and dust removal unit, a compressor and a recovery gas storage tank, the air inlet end of the cooling and dust removal unit is connected to any feeding lock hopper, and the air outlet end is connected to the recovery gas storage tank through the compressor.

[0023] Preferably, the oxygenation mechanism comprises at least one oxygen lance, one oxygen lance is provided for each immersion pipe, and the nozzle of any oxygen lance is located inside the corresponding immersion pipe.

[0024] The present invention has at least the following beneficial effects:

[0025] 1. The present invention provides an immersion pipe on the gasifier containing the molten iron bath, through which the blocky or irregularly shaped solid materials can be directly immersed in the molten pool of the gasifier for gasification treatment. Before adding the materials, there is no need to crush the solid materials and grind them into a particle size suitable for injection, so that the organic solid waste molten iron bath gasification device is not subject to the strict limitation of the physical form of the solid materials, and the versatility and universality are greatly improved. At the same time, it can also effectively reduce the workload of material pretreatment and processing costs;

[0026] 2. The present invention is provided with a spraying mechanism, wherein a bismuth liquid nozzle of the spraying mechanism is arranged on the inner side wall of the impregnation tube, and a liquid inlet end of the bismuth liquid nozzle is connected to the bottom of the gasifier, and a liquid outlet end is connected to the upper part of the impregnation tube, so that the cyclic spraying of the low-melting-point green heavy metal bismuth liquid can be realized. The bismuth liquid is sprayed into the impregnation tube through the bismuth liquid nozzle, so that the bismuth liquid falls on the top of the solid material, which can not only transfer the heat of the bismuth liquid to the solid material, but also rely on the high-density characteristic of the bismuth liquid to press the solid material into the slag liquid or iron liquid in the impregnation tube, thereby accelerating the thermal cracking of the solid material and further improving the gasification efficiency;

[0027] 3. The present invention provides an exhaust mechanism on the feeding lock hopper, which includes a cooling and dust removal unit, a compressor and a recovery gas storage tank. The exhaust mechanism can recover the volatile products generated by the gasification of solid materials, preventing the volatile products from directly entering the atmospheric environment, thereby protecting the environment.

[0028] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of the immersion tube feeding type organic solid waste molten iron bath gasification device according to one of the technical solutions of the present invention;

[0030] Figure 2 This is a schematic structural diagram of the immersion tube feeding type organic solid waste molten iron bath gasification device according to one of the technical solutions of the present invention;

[0031] Figure 3 This is a schematic structural diagram of the lower end of the immersion pipe according to one of the technical solutions of the present invention;

[0032] Description of reference numerals: gasifier 101; molten iron bath 102; molten slag bath 103; solid material 104; impregnation pipe 201; lower material bin 202; charging lock hopper 203; feed valve 204; discharge valve 205; feeding mechanism 206; inert gas pressure tank 207; cooling and dust removal unit 208; compressor 209; recovered gas storage tank 210; recovered gas nozzle 211; oxygen gun 212; synthesis gas pipeline 301; synthesis gas post-processing mechanism 302; synthesis gas storage tank 303; molten bismuth liquid 401; bismuth liquid nozzle 402; low-level bismuth liquid storage tank 403; first pipeline 404; first valve 405; booster pipe 406; gas booster mechanism 407; lifting pipe 408; high-level bismuth liquid storage tank 409; second pipeline 410; second valve 411; third valve 412; cooling jacket 413; induction heating mechanism 414; skirt 501; spoiler nozzle 502; flow channel 503. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0034] It should be noted that in the description of the present invention, the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] like Figures 1 to 3 As shown, the present invention provides an immersion tube feeding type organic solid waste molten iron bath gasification device, comprising:

[0036] A gasifier 101 contains a molten iron bath 102, a slag bath 103 floats on the molten iron bath 102, and a gas outlet is provided on the top of the gasifier 101;

[0037] At least one immersion pipe 201, the lower end of any immersion pipe 201 is immersed in the molten iron bath 102, the upper end passes through the gasifier 101 and extends to the top of the gasifier 101, the upper end of the immersion pipe 201 is connected to the feeding mechanism, and the interior of the immersion pipe 201 is connected to the oxygenation mechanism;

[0038] In the above technical solution, the gasifier 101 is a closed structure, and a working layer is formed by masonry of refractory materials, and the refractory materials are silicon aluminum, aluminum magnesium, aluminum chromium or aluminum zirconium. The outer side of the working layer is provided with a heat insulation layer and a permanent layer in sequence, and the outermost side is a steel shell; the molten iron bath 102 is a molten iron-based alloy liquid with a carbon content of 2 to 5%, and the slag bath 103 is a molten slag liquid, which covers the liquid surface of the molten iron bath 102. The temperature of the molten iron bath 102 and the slag bath 103 is maintained at 1200 to 1800°C, and the molten iron liquid and the molten slag liquid in the gasifier 101 form a high-temperature molten pool; A hole is provided at the top of the gasifier 101, and the lower end of the immersion tube 201 passes through the hole and is then immersed in the molten iron bath 102. The side wall of the immersion tube 201 is sealed and connected to the top of the gasifier 101. The immersion tube 201 is made of refractory material, and the inner wall and outer wall of the part immersed in the molten pool are both built with refractory material. The part of the immersion tube 201 immersed in the molten pool is detachably connected to other parts, which is convenient for replacement, maintenance and installation; the immersion tube 201 is provided with an observation window, a camera, and a temperature and pressure measurement system, which is convenient for observing and monitoring the working conditions of the inner cavity of the immersion tube 201;

[0039] When in use, the block or irregularly shaped solid material 104 to be gasified enters the inner cavity of the immersion tube 201 through the feeding mechanism and falls on the slag bath 103 in the immersion tube 201. The upper end of the immersion tube 201 is closed, and the solid material 104 falling into the immersion tube 201 is gasified. The gasification process is as follows: the solid material 104 falls on the slag bath 103. Since the density of the solid material 104 is relatively small, it floats on the slag bath 103 in the early stage. As the solid material 104 is heated and continuously heated, the solid material 104 begins a thermal cracking process; The pyrolysis process of organic matter is a relatively complex chemical process, which is essentially the breaking and depolymerization process of various chemical chains and chemical bonds between organic matter. It can be subdivided into various combinations of complex reactions such as dehydration, demethylation, dehydrogenation, condensation, etc. The gas products of the pyrolysis process include methane, carbon monoxide, carbon dioxide, hydrogen, water vapor, etc., and some liquid products at room temperature, such as pyroligneous acid, methanol, acetic acid, acetone, benzene, low molecular weight aliphatic hydrocarbons, tar and even asphalt substances, will also be gasified in the inner cavity of the impregnation tube 201 due to the high temperature;

[0040] Most of the volatile gases escape from the solid material 104 and enter the inner cavity of the impregnation tube 201, causing the gas pressure in the inner cavity of the impregnation tube 201 to increase. As the thermal cracking continues, the solid material 104 is completely decomposed into volatile gases, carbonaceous semi-coke particles and ash. The entire thermal cracking process is endothermic. The slag liquid in contact with the solid material 104 cools down and releases heat for thermal cracking of the material. Oxygen or oxygen-enriched air is introduced into the impregnation tube 201 through the oxygen adding mechanism. The oxygen and the impregnation tube 2 The volatile gas and carbonaceous semi-coke particles in the immersion pipe 201 undergo oxidation reaction to generate carbon monoxide gas, a small amount of carbon dioxide gas, water vapor, etc., which replenish the heat of the slag liquid in the immersion pipe 201 and increase the gas temperature and pressure in the immersion pipe 201; under the effect of the enhanced gas pressure, the liquid level of the slag in the immersion pipe 201 is continuously pressed down. When the immersion pipe 201 is immersed in the molten iron bath 102 at a depth of 1.0m, the density of the molten iron bath 102 is 7000kg / M 3The pressure difference is calculated to be 0.07 MPa. When the pressure difference between the inner cavity of the immersion tube 201 and the pressure above the liquid surface of the slag is greater than 0.07 MPa, the liquid surface of the slag in the immersion tube 201 drops to be flush with the lower end of the immersion tube 201; at this time, the high-temperature and high-pressure gas in the immersion tube 201 will go down from the liquid surface of the slag over the lower end surface of the immersion tube 201, and then turn back upward to obtain a channel for gas to escape from the molten pool in a manner such as bubbling, and finally escape from the molten pool after continuous washing by the molten iron and slag liquid, enter the interior of the gasifier 101 and be located above the slag bath 103, and be discharged from the interior of the gasifier 101 through the gas outlet; the solid carbonaceous semi-solid Part of the char particles are oxidized and enter the gas phase, and part of them are entrained by bubbles and dissolved in the molten iron; the ash is mixed with the original slag liquid during the movement of the gas and replenished as new slag liquid; finally, all organic matter must only pass through the dual high-temperature washing and thorough thermal action of the molten iron liquid and the slag liquid to break through the liquid surface of the molten iron bath 102 and the liquid surface of the slag bath 103, enter the interior of the gasifier 101 and be located above the slag bath 103, and complete the gasification process of the solid material 104; and ignoring the complex intermediate process of the solid material 104 being heated, under the premise of insufficient oxygen, the thermal cracking and gasification of the organic matter can be carried out according to the following chemical reaction formula,

[0041]

[0042] The solid material 104 of organic solid waste that falls into the inner cavity of the immersion tube 201 has a relatively slow pyrolysis process, and is prone to produce more complex intermediate products such as pyrolysis gas and volatile pyrolysis oil. However, the lower end of the immersion tube 201 is immersed in the molten iron bath 102, and the initial pyrolysis area of ​​the solid material 104 is effectively "liquid-sealed" and isolated from the area where the final product synthesis gas escapes by the molten iron and slag liquids with a temperature of up to 1200-1800°C. All bubbles that want to escape from the immersion tube 201 and the molten pool are "washed" by the high-temperature molten iron and slag liquids, thereby completing a high-temperature washing and purification process of the molten iron bath 102;

[0043] The distance between the lower end of the immersion tube 201 and the interface of the molten iron bath 102-slag bath 103 is preferably greater than 400 mm. The lower end of the immersion tube 201 is located more than 400 mm below the interface of the molten iron bath 102-slag bath 103, which is conducive to more thorough gasification of the solid material 104 in the immersion tube 201; the end surface of the lower end of the immersion tube 201 is preferably serrated or wavy, which is conducive to the high-temperature and high-pressure gas in the immersion tube 201 to evenly cross the lower end surface of the immersion tube 201, preventing a large amount of gas from escaping from a certain part of the immersion tube 201 and gushing out, which is conducive to strengthening the washing and purification effect of the molten iron and slag liquid on the gas, and thus is conducive to ensuring the cleanliness of the synthesis gas; the part of the immersion tube 201 immersed in the molten iron bath 102 can be sleeved with a ring The skirt 501 is shaped, and a plurality of flow-turbulating nozzles 502 are arranged at intervals along the circumference of the bottom of the skirt 501. A plurality of flow channels 503 are arranged in the skirt 501. One flow channel 503 is arranged corresponding to one flow-turbulating nozzle 502, and the feed end of the flow-turbulating nozzle 502 is connected with the corresponding flow channel 503. Oxygen, carbon dioxide, nitrogen and powdered materials with the above gases as carrier gases can be sprayed through the flow channel 503 and the flow-turbulating nozzle 502 to purge the bubbles of the high-temperature and high-pressure gas that cross the lower end surface of the impregnation tube 201, and the bubbles that are ready to turn back upward are turbulently crushed to break them into smaller and more dispersed bubbles, which is beneficial to further improve the washing and purification effect of the iron liquid and the slag liquid on the gas, and further beneficial to further ensure the cleanliness of the synthesis gas.

[0044] The present invention provides an immersion pipe 201 on the gasifier 101 containing a molten iron bath, through which blocky or irregularly shaped solid materials 104 can be directly immersed in the molten pool of the gasifier 101 for gasification treatment. Before adding the materials, there is no need to crush and grind the solid materials 104 to a particle size suitable for injection, so that the organic solid waste molten iron bath 102 gasification device is not subject to the strict limitations of the physical form of the solid materials 104, and its versatility and universality are greatly improved, and at the same time, it can also effectively reduce the workload of material pretreatment and processing costs.

[0045] In another technical solution, the gasifier 101 further contains molten bismuth liquid 401, and the molten bismuth liquid 401 is located below the molten iron bath 102; the immersion tube feeding type organic solid waste molten iron bath gasification device also includes at least one spraying mechanism, and one immersion tube 201 is correspondingly provided with one spraying mechanism, and any spraying mechanism includes at least one bismuth liquid nozzle 402 provided on the inner side wall of the corresponding immersion tube 201, and the liquid inlet end of any bismuth liquid nozzle 402 is connected to the bottom of the gasifier 101, and the liquid outlet end is connected to the upper part of the corresponding immersion tube 201;

[0046] The molten bismuth liquid 401 is a molten metal bismuth liquid or a molten bismuth-based low-melting-point alloy liquid, which is located at the bottom of the gasifier 101. The molten iron bath 102 is a molten iron-based alloy liquid with a carbon content of 2 to 5%, which is located on the liquid surface of the molten iron bath 102. The slag bath 103 is a molten slag liquid, which covers the liquid surface of the molten iron bath 102. The temperatures of the molten iron bath 102 and the slag bath 103 are maintained at 1200 to 1800° C. The gasifier 101 is heated from bottom to top. The molten bismuth liquid 401, the molten iron liquid and the molten slag liquid form a high-temperature molten pool, the density of the molten bismuth liquid 401, the molten iron liquid and the molten slag liquid are 10 times, 7 times and 2.5 times the density of liquid water respectively; the bismuth liquid nozzle 402 is embedded on the inner wall of the immersion tube 201, and does not affect the feeding of the solid material 104. The liquid outlet end of the bismuth liquid nozzle 402 is located above the gasification furnace 101 and faces the opening of the lower end of the immersion tube 201. so that the bismuth liquid sprayed from the liquid outlet end of the bismuth liquid nozzle 402 falls on the top of the solid material 104; when in use, the block or irregularly shaped solid material 104 to be gasified enters the inner cavity of the dipping tube 201 through the feeding mechanism and falls on the slag bath 103 in the dipping tube 201. The upper end of the dipping tube 201 is closed, and then the bismuth liquid in the gasifier 101 is continuously sprayed into the dipping tube 201 through the bismuth liquid nozzle 402, and falls on the top of the solid material 104, so that the solid material 104 can be pressed into the slag liquid or iron liquid in the dipping tube 201, and the bismuth liquid on the solid material 104 falls into the slag bath 103. Since the bismuth liquid is not miscible with the slag liquid and the iron liquid, and the density of the bismuth liquid is greater than that of the iron liquid and the slag liquid, the bismuth liquid passes through the slag bath 103 and the molten iron bath 102 in sequence, and finally returns to the molten bismuth liquid 401 at the bottom, so that the bismuth liquid can be sprayed in a circular manner;

[0047] The reason why molten bismuth liquid is selected for circulating spraying is that it meets the following requirements:

[0048] 1. Bismuth is a low melting point metal with a melting point of only 271°C. If a small amount of alloy elements is added, the melting point may drop even lower. At the same time, the boiling point is 1564°C. It is a relatively difficult to volatilize metal and the volatilization amount is not much;

[0049] 2. The density of bismuth is greater than that of molten iron and slag liquid. The solid density of bismuth is about 9800kg / m 3 After melting, the volume shrinks. The density of bismuth liquid is about 10000kg / m 3 ;

[0050] 3. The molten bismuth liquid and the iron liquid are almost completely immiscible. The bismuth liquid will settle to the lower layer of the iron liquid to form a separate layer, which is easy to release;

[0051] 4. Bismuth is a green metal, harmless to the human body and the environment. Lead also has the above-mentioned characteristics of high density, low melting point, high boiling point, and immiscible with molten iron, but lead is more harmful to the human body and the environment;

[0052] 5. The price of bismuth is relatively low. Its market price is 2-3 times higher than that of lead, but far lower than other low melting point metals such as tin, indium, and gallium;

[0053] 6. Bismuth is chemically inactive and will not oxidize before iron;

[0054] 7. Other metals either do not meet the density requirements, or have too high melting points, or too low boiling points, or have high solubility in molten iron or high solubility of iron in it, or are too expensive, or are oxidized before iron, or are harmful to the human body and the environment. For example, lead, tin, cadmium, zinc, copper, nickel, cobalt, gallium, indium and other metals or their alloys cannot meet all of the above conditions;

[0055] Therefore, a low-melting-point green heavy metal bismuth is used, and a molten metal bismuth liquid or a molten bismuth-based low-melting-point alloy liquid is used as a circulating molten metal medium to be sprayed from top to bottom inside the immersion tube 201. On the one hand, the hot bismuth liquid covers the solid material 104, thereby strengthening the heat exchange and accelerating the thermal cracking of the solid material 104. On the other hand, the density of the bismuth liquid is greater than that of the iron liquid and the slag liquid. In general, the density of the bismuth liquid can reach 10000 kg / m 3 , which is much denser than the density of the molten iron. Thus, the solid material 104 can be pressed into the molten pool as a weight to be immersed, and the thermal cracking and gasification in the molten iron and slag liquid environment can be completed more efficiently, greatly improving the gasification efficiency.

[0056] The present invention is provided with a spraying mechanism, and the bismuth liquid nozzle 402 of the spraying mechanism sprays bismuth liquid into the impregnation tube 201, so that the bismuth liquid falls on the top of the solid material 104, which can not only transfer the heat of the bismuth liquid to the solid material 104, but also rely on the high density of the bismuth liquid to press the solid material 104 into the slag liquid or iron liquid in the impregnation tube 201, thereby accelerating the thermal cracking of the solid material 104 and further improving the gasification efficiency.

[0057] In another technical solution, any spray mechanism further includes:

[0058] a low-level bismuth liquid storage tank 403, which is located below the gasifier 101, and is connected to the bottom of the gasifier 101 through a first pipe 404, on which a first valve 405 is provided; and a top of the low-level bismuth liquid storage tank 403 is connected to a pressure relief mechanism;

[0059] A boosting pipe 406, one end of which is connected to the top of the low-level bismuth liquid storage tank 403, and the other end of which is connected to the gas outlet end of the gas boosting mechanism 407;

[0060] A lifting pipe 408, the lower end of which is connected to the low-level bismuth liquid storage tank 403, and the upper end of which is connected to the liquid inlet end of any bismuth liquid nozzle 402; the lower end of the lifting pipe 408 passes through the top of the low-level bismuth liquid storage tank 403 and extends vertically downward to the lower part of the low-level bismuth liquid storage tank 403; the inner lining of the lifting pipe 408 is a refractory material and a heat-insulating material, and the outer part is a carbon steel, stainless steel or heat-resistant steel pipe;

[0061] The process of the spraying cycle of a batch of solid materials 104 is as follows: before adding materials, the first valve 405, the pressure relief mechanism, and the gas pressurizing mechanism 407 are all in a closed state. The first valve 405 is opened, and the bismuth liquid in the gasifier 101 enters the low-level bismuth liquid storage tank 403 through the first pipeline 404. When the liquid level of the bismuth liquid in the low-level bismuth liquid storage tank 403 reaches a certain height (the certain height is that the amount of bismuth liquid in the low-level bismuth liquid storage tank 403 can meet the spraying of a batch of solid materials 104), the first valve 405 is closed; after adding materials, the gas pressurizing mechanism 407 is opened, and the high-pressure inert gas pressurized by the gas pressurizing mechanism 407 enters the low-level bismuth liquid storage tank 403 through the pressurizing pipe 406. The high-pressure inert gas pressurizes the liquid level of the bismuth liquid in the low-level bismuth liquid storage tank 403, and the absolute pressure of the pressurization is 1.0 to 3.0 MPa, preferably 2.0 to 3.0 MPa. , the lower end of the lifting pipe 408 is immersed in the bismuth liquid. Under the action of continuous pressure, the bismuth liquid continuously enters the lifting pipe 408 from the lower end of the lifting pipe 408, rises along the lifting pipe 408, and is finally sprayed out through the bismuth liquid nozzle 402. After the solid material 104 is gasified, the gas boosting mechanism 407 is closed, the high-pressure inert gas is stopped from being introduced into the low-level liquid storage tank, the pressure relief mechanism is opened, and the high-pressure inert gas in the low-level bismuth liquid storage tank 403 is discharged until the pressure in the low-level bismuth liquid storage tank 403 drops to balance with the atmospheric pressure, and the pressure relief mechanism is closed to complete the spraying cycle of a batch of solid materials 104. Through the low-level bismuth liquid storage tank 403, the boosting pipe 406 and the lifting pipe 408, the cyclic spraying of bismuth liquid can be realized. The low-level bismuth liquid storage tank 403 plays the role of a primary buffer, which is conducive to ensuring the continuity and stability of the bismuth liquid spraying, and further ensuring the gasification efficiency of the solid material 104.

[0062] In another technical solution, any spray mechanism further includes:

[0063] a high-position bismuth liquid storage tank 409, which is disposed above the low-position bismuth liquid storage tank 403 and between the upper end of the lifting pipe 408 and any bismuth liquid nozzle 402; the top of the high-position bismuth liquid storage tank 409 is connected to the upper end of the lifting pipe 408, and the bottom is connected to any bismuth liquid nozzle 402 through a second pipe 410; a second valve 411 is provided on the lifting pipe 408, and a third valve 412 is provided on the second pipe 410;

[0064] The process of the spraying cycle of a batch of solid materials 104 is as follows: before adding materials, the first valve 405, the pressure relief mechanism, the gas pressurizing mechanism 407, the second valve 411, and the third valve 412 are all in a closed state. The first valve 405 is opened, and the bismuth liquid in the gasifier 101 enters the low-level bismuth liquid storage tank 403 through the first pipeline 404. When the liquid level of the bismuth liquid in the low-level bismuth liquid storage tank 403 reaches a certain height (the certain height is that the amount of bismuth liquid in the low-level bismuth liquid storage tank 403 can meet the demand of the high-level bismuth liquid storage tank 409 for bismuth liquid), the first valve 405 is closed. The above operation of injecting bismuth liquid into the low-level bismuth liquid storage tank 403 by controlling the first valve 405 can also be performed when the solid materials 104 of the previous batch are injected into the impregnation tube 201. The process of thermal cracking and gasification is completed; the gas boosting mechanism 407 and the second valve 411 are opened, and the high-pressure inert gas pressurized by the gas boosting mechanism 407 enters the low-level bismuth liquid storage tank 403 through the boosting pipe 406, and the high-pressure inert gas pressurizes the liquid surface of the bismuth liquid in the low-level bismuth liquid storage tank 403, and the absolute pressure of the pressurization is 1.0-3.0 MPa, preferably 2.0-3.0 MPa, and the lower end of the lifting pipe 408 is immersed in the bismuth liquid. Under the action of continuous pressure, the bismuth liquid continuously enters the lifting pipe 408 from the lower end of the lifting pipe 408, and rises along the lifting pipe 408, and enters the high-level bismuth liquid storage tank 409 through the second valve 411. When the liquid level of the bismuth liquid in the high-level bismuth liquid storage tank 409 reaches a certain height (the certain height is the low-level bismuth liquid storage tank 409), the bismuth liquid in the high-level bismuth liquid storage tank 409 is increased to a certain height. When the amount of bismuth liquid in the low-level bismuth liquid storage tank 403 is sufficient to spray a batch of solid materials 104), the gas pressurizing mechanism 407 and the second valve 411 are closed to stop the introduction of high-pressure inert gas into the low-level liquid storage tank; the pressure relief mechanism is opened to discharge the high-pressure inert gas in the low-level bismuth liquid storage tank 403 until the pressure in the low-level bismuth liquid storage tank 403 drops to be balanced with the atmospheric pressure, the pressure relief mechanism is closed, and after the material is added, the third valve 412 is opened, and the bismuth liquid in the high-level bismuth liquid storage tank 409 enters the second pipeline 410 and is finally sprayed out through the bismuth liquid nozzle 402. After the solid materials 104 are completely gasified, the third valve 412 is closed to complete the spraying cycle of a batch of solid materials 104; the high-level bismuth liquid storage tank 409 plays the role of a secondary buffer, which is beneficial to In order to further ensure the continuity and stability of the bismuth liquid spraying, and further ensure the gasification efficiency of the solid material 104; in addition, when the liquid level of the bismuth liquid in the high-level bismuth liquid storage tank 409 reaches a certain height, after the second valve 411 is closed, the high-level bismuth liquid storage tank 409 is a closed structure, and the bismuth liquid in the high-level bismuth liquid storage tank 409 can be heated, and the temperature of the bismuth liquid sprayed out by the bismuth liquid nozzle 402 is increased, which is conducive to further improving the gasification efficiency of the solid material 104; the high-pressure inert gas discharged from the low-level bismuth liquid storage tank 403 absorbs the heat of the bismuth liquid, and this part of the heat can be reused to heat the bismuth liquid in the high-level bismuth liquid storage tank 409, or to dry the solid material 104, or in other occasions where heating is required, thereby reducing heat loss.

[0065] In another technical solution, a cooling jacket 413 is provided on any first pipeline 404, and is located between one end of the first pipeline 404 close to the gasifier 101 and the first valve 405; a cooling medium (water, nitrogen, etc.) is introduced into a cooling pipe in the cooling jacket 413 to cool the bismuth liquid in the first pipeline 404 by indirect heat exchange, and the bismuth liquid flowing through the first valve 405 and entering the low-level bismuth liquid storage tank 403 is cooled by selecting appropriate parameters such as the cooling jacket 413, the type of cooling medium, the temperature of the cooling medium, and the flow rate of the cooling medium. The temperature is 300-1200° C., preferably 300-800° C., and the bismuth liquid is made to rise along the riser 408 at a temperature higher than the melting point but not too high in superheat, which is beneficial to prolonging the service life of the first valve 405 and the riser 408 while ensuring the smooth flow of the bismuth liquid. In addition, the cooling medium coming out of the cooling jacket 413 absorbs the heat of the bismuth liquid, and this part of the heat can be reused to heat the bismuth liquid in the high-level bismuth liquid storage tank 409, or to dry the solid material 104, or in other occasions where heating is required, thereby reducing heat loss.

[0066] In another technical solution, the lower part of the gasifier 101 is an inverted cone structure, and an induction heating mechanism 414 is provided at the lower part of the gasifier 101; the lower part of the gasifier 101 adopts a tall and thin inverted cone structure, which can form a longitudinal height difference with a smaller amount of molten bismuth liquid 401, which is beneficial to reduce the amount of bismuth liquid and ensure the smooth flow of bismuth liquid; the induction heating mechanism 414 is sleeved on the lower part of the gasifier 101, and the induction heating mechanism 414 can heat the bismuth liquid in the gasifier 101 through a coil, so that the temperature of the bismuth liquid in the gasifier 101 is maintained above the melting point, ensuring that the bismuth liquid does not solidify, and preventing the bismuth liquid from increasing in volume after solidification and expanding to damage the gasifier 101.

[0067] In another technical solution, it also includes a synthesis gas pipeline 301, one end of which is connected to the gas outlet, and the other end is connected to the synthesis gas storage tank 303. The other end of the synthesis gas pipeline 301 is connected to the synthesis gas storage tank 303 through a synthesis gas post-processing mechanism 302; the synthesis gas inside the gasifier 101 and located above the slag bath 103 enters the synthesis gas pipeline 301, and after being cooled, dusted, desulfurized, deacidified and other treatments by the synthesis gas post-processing mechanism 302, it is stored in the synthesis gas storage tank 303 to balance the fluctuations of the production process. The synthesis gas in the synthesis gas storage tank 303 can be transported to the user end or the entrance of the next process; the dry dust removal ash of the synthesis gas post-processing mechanism 302 can be used as the source of powdered material sprayed by the turbulence nozzle 502.

[0068] In another technical solution, the feeding mechanism includes a lower material bin 202 and at least one charging lock hopper 203. The lower material bin 202 is arranged above any immersion pipe 201. One charging lock hopper 203 is arranged corresponding to one immersion pipe 201. The top of any charging lock hopper 203 is connected with the bottom of the lower material bin 202, and the bottom is connected with the top of the corresponding immersion pipe 201. A feeding valve 204 is arranged on the top of any charging lock hopper 203, and a discharge valve 205 is arranged on the bottom; any charging lock hopper 203 is connected with the inert gas pressure tank 207 and the exhaust mechanism; a charging lock hopper 203 is arranged on the lower material bin 202. Mechanism 206, feeding is performed through the feeding mechanism 206; when the feed valve 204 and the discharge valve 205 are closed, the feeding lock hopper 203 is a closed pressure vessel, which is pressurized by inflating the inert gas pressure tank 207, and decompressed by exhausting the air through the exhaust mechanism. The feeding lock hopper 203 is a water-cooled structure, and the part where the immersion pipe 201 and the feeding lock hopper 203 are connected adopts a water-cooled structure. The inside of the side wall of the feeding lock hopper 203 and the inside of the side wall of the part where the immersion pipe 201 and the feeding lock hopper 203 are connected are provided with cooling pipes, and cooling water is introduced into the cooling pipes to reduce the temperature, which is conducive to ensuring the safety performance of the operation;

[0069] Before the feeding and gasification operation is performed, the feed valve 204, the discharge valve 205, the inert gas pressure tank 207 and the exhaust mechanism are all in a closed state, and the entire device is in a closed state and isolated from the outside atmosphere. A portion of the air in the gasifier 101 is extracted through the synthesis gas post-processing mechanism 302, and then inert gases such as nitrogen and carbon dioxide are blown into the gasifier 101 to reduce the oxygen concentration in the air in the gasifier 101 to a safe level, and then the feeding and gasification operation is started;

[0070] The process of a batch of solid material 104 feeding cycle is as follows: before feeding, the feed valve 204, the discharge valve 205, the inert gas pressure tank 207 and the exhaust mechanism are all in a closed state. During feeding, the feeding mechanism 206 transports the block or irregularly shaped solid material 104 to the lower bin 202, opens the feed valve 204, and the solid material 104 falls from the lower bin 202 into the feeding lock hopper 203, closes the feed valve 204, opens the inert gas pressure tank 207, and inflates the feeding lock hopper 203 through the inert gas pressure tank 207 to pressurize it until the pressure in the feeding lock hopper 203 is equal to the inner cavity of the immersion tube 201. The pressure in the charging lock hopper 203 is balanced, the inert gas pressure tank 207 is closed, the discharge valve 205 is opened, the solid material 104 enters the inner cavity of the immersion tube 201, and falls on the slag bath 103 in the immersion tube 201, the discharge valve 205 is closed in time, the exhaust mechanism is opened, and the air is exhausted from the charging lock hopper 203 to reduce the pressure until the pressure in the charging lock hopper 203 drops to balance with the external atmospheric pressure, and the exhaust mechanism is closed to complete the charging cycle of a batch of solid materials 104; through the charging lock hopper 203, the feeding valve 204, the discharge valve 205, the inert gas pressure tank 207, and the exhaust mechanism, continuous and stable charging of the solid material 104 can be achieved.

[0071] In another technical solution, the exhaust mechanism includes a cooling and dust removal unit 208, a compressor 209 and a recovery gas storage tank 210, the air inlet end of the cooling and dust removal unit 208 is connected to any feeding lock hopper 203, and the air outlet end is connected to the recovery gas storage tank 210 through the compressor 209; the solid material 104 of the organic solid waste in the immersion tube 201 is gasified, and its pyrolysis process is relatively slow, and it is easy to produce more pyrolysis gas, volatile pyrolysis oil and other complex intermediate products. If the volatile products produced enter the atmospheric environment, they will cause secondary pollution; when the discharge valve 205 is opened to add material, the volatile products in the immersion tube 201 will enter the feeding lock hopper 203. After the gasification of the batch of solid materials 104 is completed, the exhaust mechanism is opened to suck out the gas in the feeding lock hopper 203, and the gas is cooled and dusted by the cooling and dust removal unit 208. The gas in the recovery gas storage tank 210 is pressurized by the compressor 209 and then stored in the recovery gas storage tank 210. The exhaust mechanism is closed, and the inert gas pressure tank 207 is opened. The charging lock hopper 203 is inflated and pressurized through the inert gas pressure tank 207 until it is balanced with the external atmospheric pressure; the gas in the recovery gas storage tank 210 can be sprayed into the immersion tube 201 through the recovery gas nozzle 211 to increase the pressure of the inner cavity of the immersion tube 201, and can also be directly sprayed into the molten iron bath 102 for treatment. The recovery gas storage tank 201 can also be connected to the flow channel 503. The gas in the recovery gas storage tank 210 can be directly sprayed through the spoiler nozzle 502 or used as a carrier for spraying powdered materials. This part of volatile products will not directly enter the atmospheric environment, thereby protecting the environment; the dry dust removal ash of the cooling and dust removal unit 208 can be used as the source of powdered materials sprayed by the spoiler nozzle 502.

[0072] In another technical solution, the oxygenation mechanism includes at least one oxygen lance 212, and one oxygen lance 212 is correspondingly arranged for one impregnation tube 201, and the nozzle of any oxygen lance 212 is located inside the corresponding impregnation tube 201; oxygen or oxygen-enriched air is sprayed toward the solid material 104 and the slag liquid in the impregnation tube 201 through the oxygen lance 212, and the oxygen reacts with the volatile gas and carbonaceous semi-coke particles in the impregnation tube 201 to generate carbon monoxide gas, a small amount of carbon dioxide gas, water vapor, etc., which replenishes the heat of the slag liquid in the impregnation tube 201 while increasing the gas temperature and pressure in the impregnation tube 201, which is beneficial to improving the gasification efficiency of the solid material 104 in the impregnation tube 201, and at the same time provides an oxygen source to replenish the heat of the gasification process.

[0073] The method for using the immersion tube feeding type organic solid waste molten iron bath gasification device comprises the following steps:

[0074] Step 1), while the first valve 405 is kept closed, molten bismuth solution 401, molten iron bath 102, and slag bath 103 are placed in the gasifier 101 from bottom to top, and the temperatures of the molten iron bath 102 and the slag bath 103 are maintained at 1200-1800° C.;

[0075] Step 2), before the feeding and gasification operation, the oxygen concentration of the air in the gasifier 101 is reduced to a safe level; the specific process is: before the feeding and gasification operation, the feed valve 204, the discharge valve 205, the inert gas pressure tank 207 and the exhaust mechanism are all in a closed state, the entire device is in a closed state, isolated from the outside atmosphere, a part of the air in the gasifier 101 is extracted through the synthesis gas post-processing mechanism 302, and then nitrogen, carbon dioxide and other inert gases are blown into the gasifier 101 to reduce the oxygen concentration in the air in the gasifier 101 to a safe level;

[0076] Step 3), injecting the bismuth liquid in the gasifier 101 into the high-position bismuth liquid storage tank 409, so that the liquid level of the bismuth liquid in the high-position bismuth liquid storage tank 409 reaches a certain height; the specific process is: the first valve 405, the pressure relief mechanism, the gas pressurizing mechanism 407, the second valve 411, and the third valve 412 are all in a closed state, the first valve 405 is opened, and the bismuth liquid in the gasifier 101 enters the low-position bismuth liquid storage tank 403 through the first pipeline 404. When the liquid level of the bismuth liquid in the low-position bismuth liquid storage tank 403 reaches a certain height, the first valve 405 is closed; the gas pressurizing mechanism 407 and the second valve 411 are opened, and the high-pressure inert gas pressurized by the gas pressurizing mechanism 407 enters the low-position bismuth liquid storage tank 403 through the pressurizing pipe 406, and the high-pressure inert gas enters the low-position bismuth liquid storage tank 403. The gas pressurizes the liquid surface of the bismuth liquid in the low-level bismuth liquid storage tank 403, and the absolute pressure of the pressurization is 1.0-3.0 MPa. The lower end of the lifting pipe 408 is immersed in the bismuth liquid. Under the action of the continuous pressure, the bismuth liquid continuously enters the lifting pipe 408 from the lower end thereof, and rises along the lifting pipe 408 to enter the high-level bismuth liquid storage tank 409 through the second valve 411. When the liquid surface of the bismuth liquid in the high-level bismuth liquid storage tank 409 reaches a certain height, the gas pressurizing mechanism 407 and the second valve 411 are closed, and the high-pressure inert gas is stopped from being introduced into the low-level liquid storage tank. The pressure relief mechanism is opened to discharge the high-pressure inert gas in the low-level bismuth liquid storage tank 403 until the pressure in the low-level bismuth liquid storage tank 403 drops to be balanced with the atmospheric pressure, and the pressure relief mechanism is closed.

[0077] Step 4), solid material 104 is added into the impregnation tube 201 through the feeding mechanism; the specific process is: the feeding valve 204, the discharging valve 205, the inert gas pressure tank 207 and the exhaust mechanism are all in a closed state, the feeding mechanism 206 transports the block or irregularly shaped solid material 104 to the lower bin 202, the feeding valve 204 is opened, the solid material 104 falls from the lower bin 202 into the feeding lock hopper 203, and the feeding valve 204 is closed;

[0078] Step 5), after the solid material 104 is added, the oxygen lance 212 is opened, and the bismuth liquid in the high-level bismuth liquid storage tank 409 is continuously sprayed into the immersion pipe 201 through the bismuth liquid spray head; the specific process is: the oxygen lance 212 is opened, oxygen or oxygen-enriched air is sprayed toward the solid material 104 and the slag liquid in the immersion pipe 201 through the oxygen lance 212, and the third valve 412 is opened, so that the bismuth liquid in the high-level bismuth liquid storage tank 409 enters the second pipe 410, and finally sprayed out through the bismuth liquid spray head 402;

[0079] Step 6), after the solid material 104 is gasified, the oxygen lance 212 is closed, and the spraying of bismuth liquid into the impregnation tube 201 is stopped. The specific process is as follows: after a few minutes, the solid material 104 is gasified, the oxygen lance 212 is closed, the spraying of oxygen or oxygen-enriched air into the solid material 104 and the slag liquid in the impregnation tube 201 is stopped, the third valve 412 is closed, the spraying of bismuth liquid into the impregnation tube 201 is stopped, and then the exhaust mechanism is opened to extract the gas in the charging lock hopper 203, and the gas is cooled and dust-removed by the cooling and dust removal unit 208, and then pressurized by the compressor 209 and stored in the recovery gas storage tank 210, and the exhaust mechanism is closed, and the inert gas pressure tank 207 is opened, and the charging lock hopper 203 is charged and pressurized by the inert gas pressure tank 207 until it is balanced with the external atmospheric pressure;

[0080] Step 7), repeating steps 3) to 6) to gasify the next batch of solid materials 104;

[0081] Step 8), regularly carry out slag removal;

[0082] Theoretically, the amount of molten iron and bismuth liquid basically does not increase or decrease. Although gasification may take away some iron- and bismuth-containing materials, these iron- and bismuth-containing materials are cooled and collected during the cooling and dust removal of the recovered gas and synthetic gas, and are usually sprayed into the gasifier 101 again. At some times, the amount of molten iron may increase. This is because the solid material 104 contains some iron-containing metals or substances containing iron oxide. The former directly dissolves into the iron bath, and the latter is reduced by carbon and enters the molten iron. Other metals or their compounds such as copper, tin, lead, silver, nickel, etc. will also dissolve in the iron bath or bismuth liquid, or sink to the bottom of the molten iron bath 102 or the bottom of the molten bismuth liquid 401 due to insolubility, forming a new metal liquid phase. Since the ash produced by the gasification of the solid material 104 enters the slag, the liquid level of the molten iron bath 102 will gradually rise. When the liquid level of the slag bath 103 rises to a certain height, the feeding gasification operation is stopped and the slag discharge is carried out.

[0083] The inner diameter of the gasifier 101 is 2.8-3.5 m, and the inverted cone structure at the bottom is mainly used to hold the molten bismuth liquid 401. The amount of the molten bismuth liquid 401 is 100-200 t, and the height from the liquid surface of the molten bismuth liquid 401 to the bottom of the gasifier 101 is 3-8 m. 60-100 t of molten iron liquid is held on the molten bismuth liquid 401. The depth of the molten iron bath 102 is 1.0-1.5 m, and the molten iron bath 102 is covered with molten slag liquid with a thickness of 300-600 mm. The circulation amount of the bismuth liquid per hour is 100-200 t, and the circulation amount of the bismuth liquid per t of the solid material 104 is 5-10 t. The bismuth liquid is cooled from 600-1200° C. to 400-800° C. through heat exchange of the nitrogen cooling jacket 413.

[0084] The inner diameter of the immersion pipe 201 is 1.2-1.5m, and the lower end of the immersion pipe 201 is inserted into the molten iron bath 102 to a depth of 600-1000mm; 100-500kg of each batch of packaged solid material 104 is put in at one time, and it takes about 1-2min to be completely gasified. The maximum weight of the bulk or packaged solid material 104 that can be gasified per hour is 5-15t, and the pure oxygen consumed per ton is about 500-700Nm 3 The volume of effective synthesis gas produced by each ton of solid material 104 of organic solid waste is 1000-2000Nm 3 The composition of the synthesis gas obtained by gasifying the solid material 104 of typical organic solid waste after dehydration and drying is 48-55% carbon monoxide gas, 25-28% hydrogen gas, and 15-22% carbon dioxide gas.

[0085] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Immersion tube feeding type organic solid waste molten iron bath gasification device, It is characterized in that include: A gasifier, wherein a molten iron bath is contained in the gasifier, a molten slag bath floats on the molten iron bath, and a gas outlet is provided on the top of the gasifier; at least one immersion pipe, the lower end of any immersion pipe is immersed in the molten iron bath, the upper end passes through the gasifier and extends to above the gasifier, the upper end of the immersion pipe is connected to the feeding mechanism, and the interior of the immersion pipe is connected to the oxygenation mechanism; The gasifier also contains molten bismuth liquid, and the molten bismuth liquid is located below the molten iron bath. The immersion tube feeding type organic solid waste molten iron bath gasification device also includes at least one spraying mechanism, and one spraying mechanism is correspondingly arranged for one immersion tube. Any spraying mechanism includes at least one bismuth liquid nozzle arranged on the inner side wall of the immersion tube corresponding to it. The liquid inlet end of any bismuth liquid nozzle is connected to the bottom of the gasifier, and the liquid outlet end is connected to the upper part of the immersion tube corresponding to it.

2. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 1, It is characterized in that Any spray mechanism also includes: a low-level bismuth liquid storage tank, which is located below the gasifier, and is connected to the bottom of the gasifier through a first pipeline, and a first valve is provided on the first pipeline; and a top of the low-level bismuth liquid storage tank is connected to a pressure relief mechanism; A boosting pipe, one end of which is connected to the top of the low-level bismuth liquid storage tank, and the other end of which is connected to the gas outlet end of the gas boosting mechanism; A riser, the lower end of which is connected to the low-level bismuth liquid storage tank, and the upper end of which is connected to the liquid inlet end of any bismuth liquid nozzle.

3. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 2, It is characterized in that Any spray mechanism also includes: A high-level bismuth liquid storage tank is arranged above the low-level bismuth liquid storage tank and is located between the upper end of the lifting pipe and any bismuth liquid nozzle. The top of the high-level bismuth liquid storage tank is connected with the upper end of the lifting pipe, and the bottom is connected with any bismuth liquid nozzle through a second pipeline. The lifting pipe is provided with a second valve, and the second pipeline is provided with a third valve.

4. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 3, It is characterized in that Any first pipeline is provided with a cooling jacket, which is located between the end of the first pipeline close to the gasifier and the first valve.

5. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 4, It is characterized in that The lower part of the gasifier is an inverted cone structure, and an induction heating mechanism is arranged at the lower part of the gasifier.

6. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 1, It is characterized in that It also includes a synthesis gas pipeline, one end of which is connected to the gas outlet, and the other end of which is connected to the synthesis gas storage tank.

7. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 1, It is characterized in that The feeding mechanism includes a lower feeding bin and at least one feeding lock hopper, wherein the lower feeding bin is arranged above any immersion pipe, and one feeding lock hopper is arranged corresponding to one immersion pipe. The top of any feeding lock hopper is connected with the bottom of the lower feeding bin, and the bottom is connected with the top of the immersion pipe corresponding thereto. A feeding valve is arranged at the top of any feeding lock hopper, and a discharging valve is arranged at the bottom; and any feeding lock hopper is connected with the inert gas pressure tank and the exhaust mechanism.

8. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 7, It is characterized in that The air extraction mechanism includes a cooling and dust removal unit, a compressor and a recovery gas storage tank. The air inlet end of the cooling and dust removal unit is connected to any feeding lock hopper, and the air outlet end is connected to the recovery gas storage tank through the compressor.

9. The immersion tube feeding type organic solid waste molten iron bath gasification device according to claim 1, It is characterized in that The oxygenation mechanism comprises at least one oxygen lance, one oxygen lance is arranged corresponding to one immersion pipe, and the nozzle of any oxygen lance is located inside the corresponding immersion pipe.

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