Molten metal reaction kettle

Abstract

The utility model relates to a molten metal reaction kettle, belongs to the technical field of recycling of recyclable and renewable resources such as household garbage, industrial garbage and biomass, and solves the problem that the same-quality or high-quality utilization cannot be realized due to the fact that macromolecular organic matters are not thoroughly decomposed in the prior art. Secondary pollution to the environment is caused, and the like. The molten metal reaction kettle comprises a first-stage molten metal reaction kettle, and the first-stage molten metal reaction kettle comprises a feeding port, a first gasifying agent spray gun mounting port and a second gasifying agent spray gun mounting port which are formed in the top of the first-stage molten metal reaction kettle, and a first metal pool arranged in the first-stage molten metal reaction kettle. The same-quality and high-quality reutilization of recyclable and renewable resources such as household garbage, industrial garbage and biomass is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the recycling technology field based on recyclable, renewable resources such as domestic waste, industrial waste and biomass, especially relates to a molten metal reaction kettle. BACKGROUND

[0002] Under the background of global carbon reduction, three fields are recognized as difficult to get rid of the dependence on carbon, which are aviation and shipping industry, ocean transportation industry and plastic production industry. Through the recycling of recyclable resources, the recycling of renewable resources and the conversion utilization of carbon dioxide, the dependence on disposable petrochemical energy can be reduced to a certain extent. However, due to the high stability and high capture cost of carbon dioxide, its direct conversion utilization faces great challenges. Therefore, the recycling of recyclable resources and the recycling of renewable resources become more realistic and preferred choices.

[0003] At present, the resourceization and energy utilization technology of biomass (a renewable resource) and low-quality waste plastic (a recyclable resource) mainly adopts thermal disposal technology, which is divided into direct incineration and pyrolysis gasification. Since direct incineration is a solid heterogeneous combustion, it has the problems of incomplete combustion, low efficiency, secondary pollution caused by incomplete combustion, especially the emission of dioxins, which restricts the wide application of this technology. Pyrolysis gasification can convert municipal solid waste into three types of products, namely gas, liquid and solid, which can effectively improve the utilization efficiency, utilization range and economy. From the perspective of pollutant emission, the pyrolysis gasification process is carried out in a poor oxygen or oxygen-free atmosphere, which reduces the generation of dioxins in principle, and most of the heavy metals dissolve into the ash during the pyrolysis gasification process, reducing the emission amount. Therefore, developing pyrolysis gasification technology is an important way to realize the harmless, resourceization and energy utilization of municipal solid waste.

[0004] Pyrolysis gasification technology is a technology that utilizes heat to make the components of the material undergo bond breaking, isomerization and small molecule polymerization reactions under anaerobic or hypoxic conditions, and converts large molecular organic matter into small molecular fuel gas, tar and coke. Existing pyrolysis gasification technologies such as the Landgard system using a rotary kiln for pyrolysis, the CAO system using grate incineration technology, and the Purox system using an internal hot moving bed, etc. These pyrolysis gasification technologies generally have the problems of complex target product composition, poor quality, high subsequent recycling cost, and inability to achieve high-quality utilization. In the gasification process, the flue gas may contain nitrogen oxides, dioxins, heavy metals and other harmful substances, causing secondary pollution to the environment. The process is complex, and the construction and operation costs are high. SUMMARY

[0005] In view of the above analysis, the present application aims to provide a molten metal reactor, which can solve at least one of the problems of the prior pyrolysis gasification equipment, such as the inability to realize the reuse of the same quality or even high-quality products, and the complex structure.

[0006] The present application mainly aims to achieve the above technical solutions.

[0007] The molten metal reactor comprises a first-stage molten metal reactor, which comprises a feeding port, a first gasification agent spray gun mounting port and a second gasification agent spray gun mounting port arranged on the top of the reactor, and a first metal pool arranged inside the first-stage molten metal reactor.

[0008] Further, the molten metal reactor further comprises a second-stage molten metal reactor, which comprises a synthetic gas outlet arranged on the top of the reactor, and a second metal pool and a slag liquid pool arranged in the second-stage molten metal reactor from bottom to top, wherein the height of the bottom of the second metal pool is higher than that of the first metal pool.

[0009] Preferably, the first gasification agent spray gun mounting port and the second gasification agent spray gun mounting port are symmetrically arranged at an angle of 180° with respect to the horizontal direction, and the angle between the first gasification agent spray gun mounting port and the second gasification agent spray gun mounting port and the horizontal direction is 45°, and the axis of the first gasification agent spray gun mounting port and the second gasification agent spray gun mounting port passes through the cross-sectional center point of the first metal pool.

[0010] Further, the second-stage molten metal reactor further comprises a lower slag discharge port, a middle slag discharge port and an upper slag discharge port on the outer wall of the reactor body.

[0011] Specifically, the lower slag discharge port, the middle slag discharge port and the upper slag discharge port correspond to the upper liquid level, the middle liquid level and the lower liquid level of the liquid in the slag liquid pool, respectively.

[0012] Preferably, the upper part of the outer wall of the second-stage molten metal reactor is further provided with a third gasification agent spray gun mounting port and a biomass spray gun mounting port.

[0013] Specifically, the third gasification agent spray gun mounting port and the biomass spray gun mounting port are symmetrically arranged at an angle of 180° with respect to the horizontal direction, and the angle between the third gasification agent spray gun mounting port and the biomass spray gun mounting port and the horizontal direction is 60°, and the axis of the third gasification agent spray gun mounting port and the biomass spray gun mounting port passes through the cross-sectional center point of the second metal pool.

[0014] Further, the first-stage molten metal reactor is communicated with the second-stage molten metal reactor through a semi-conical gas-liquid passage.

[0015] Specifically, the gas-liquid passage comprises a passage inlet, a passage main body and a passage outlet, the passage inlet is connected with the side wall of the first-stage molten metal reactor, and the passage outlet is connected with the side wall of the second-stage molten metal reactor.

[0016] Preferably, the primary molten metal reactor and the top of the secondary molten metal reactor are provided with an infrared temperature detector.

[0017] Compared with the prior art, the utility model at least can realize following beneficial effect one:

[0018] 1, the utility model discloses the design of the communication of different height metal pool, the minimum cross-sectional area of passage is filled with iron liquid completely, on one hand effectively prevent the accumulation of blocky material and the possible jam problem caused by, on the other hand, ensure that the reaction between two reactor cannot carry out gas exchange.

[0019] 2, the utility model discloses the gas-liquid passage between primary molten metal reactor and secondary molten metal reactor adopts the design of semi-cone structure passage, forms a gradually narrowing conical path from passage entrance to passage outlet, there is always metal liquid infiltration in the passage, ensure that the material will not jam the passage.

[0020] 3, the utility model discloses the secondary molten metal reactor includes second metal pool and slag liquid pool, and when reacting, the molten slag produced after the material is reacted through primary molten metal reactor and coarse gas are sprayed into secondary molten metal reactor together, finally enter the slag liquid pool of secondary molten reaction reactor, and are regularly discharged from the reaction system through upper slag discharge port;The design of slag liquid pool further avoids the escape of macromolecular organic matter, and can capture harmful components such as sulfur, salt and ash, to ensure the purity of product inorganic mixed gas.

[0021] 4, the utility model discloses molten metal reactor can realize more efficient material mixing through the layout and angle design of gasification agent lance and biomass lance, to ensure rapid and complete reaction.

[0022] In the utility model, the above-mentioned technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the utility model will be described in the following content, and some advantages can become apparent from the description or by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained from the content specially pointed out in the text and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings are only used for the purpose of showing specific embodiments and are not considered as limiting the utility model, and in the whole drawings, the same reference signs represent the same parts.

[0024] Figure 1 It is the appearance view of the utility model molten metal reactor;

[0025] Figure 2 It is the sectional view of the utility model molten metal reactor;

[0026] Figure 3The working state diagram of the molten metal reaction kettle after adding iron liquid and slag liquid;

[0027] Figure 4 The feeding and preheating material system diagram of the utility model;

[0028] Figure 5 The external heat exchange system diagram of the feeding tank of the utility model;

[0029] Figure 6 The utility model discloses Figure 5 The local enlarged view of A in the middle part;

[0030] Figure 7 The longitudinal sectional view of the feeding tank of the utility model;

[0031] Figure 8 The front view of the rotating shaft and the poking piece of the utility model;

[0032] Figure 9 The plan view of the inner poking piece unit and the rotating shaft of the utility model;

[0033] Figure 10 The front view of the first paddle of the utility model;

[0034] Figure 11 The plan view of the upper poking piece outside the upper part of the rotating shaft and the rotating shaft of the utility model;

[0035] Figure 12 The plan view of the lower poking piece outside the lower part of the rotating shaft and the rotating shaft of the utility model;

[0036] Figure 13 The plan view of the upper segment poking piece of the material dropping port and the rotating shaft in the material dropping port area of the utility model;

[0037] Figure 14 The plan view of the shovel poking piece and the rotating shaft of the utility model;

[0038] Figure 15 The plan view of the material dropping port flange of the utility model;

[0039] Figure 16 The three-dimensional structure view of the material dropping port, the material dropping port flange and the shovel poking piece of the utility model;

[0040] Figure 17 The angle relationship schematic of the inner poking piece unit in the plan view angle of the utility model Figure 1 ;

[0041] Figure 18 The angle relationship schematic of the inner poking piece unit in the plan view angle of the utility model Figure 2 ;

[0042] Figure 19Figure 2 is a schematic diagram of the angle relationship of the inside stirring piece unit in the front view angle of the embodiment 2 of the utility model;

[0043] Figure 20 Figure 3 is a schematic diagram of the angle relationship of the upper outside stirring piece unit in the top view angle of the embodiment 2 of the utility model;

[0044] Figure 21 Figure 4 is a schematic diagram of the angle relationship of the lower outside stirring piece unit in the top view angle of the embodiment 2 of the utility model;

[0045] Figure 22 Figure 5 is a schematic diagram of the angle relationship of the outside stirring piece unit in the front view angle of the embodiment 2 of the utility model;

[0046] Figure 23 Figure 6 is a gasification system diagram based on molten metal of the embodiment 1 of the utility model.

[0047] Reference signs:

[0048] 1 - primary molten metal reactor; 101 - first metal pool; 102 - feeding port; 2 - secondary molten metal reactor; 201 - second metal pool; 202 - slag liquid pool; 3 - gas-liquid passage; 4 - liquid discharge port; 501 - upper slag discharge port; 502 - middle slag discharge port; 503 - lower slag discharge port; 601 - first gasification agent spray gun mounting port; 602 - second gasification agent spray gun mounting port; 7 - third gasification agent spray gun mounting port; 8 - biomass spray gun mounting port; 9 - synthetic gas outlet; 10 - second screw conveyor; 11 - molten channel; 12 - third gasification agent spray gun; 13 - biomass spray gun; 14 - first gasification agent spray gun; 15 - second gasification agent spray gun; 16 - pouring tank A; 17 - pouring tank B; 18 - first screw conveyor; 19 - feeding tank; 20 - second screw conveyor; 21 - tank body; 22 - flange of pouring port; 23 - heat exchange jacket; 24 - medium inlet; 25 - medium outlet; 26 - fin; 27 - conical pouring port; 28 - necked flange; 29 - rotating shaft; 30 - inside stirring piece unit; 31 - upper outside stirring piece; 32 - lower outside stirring piece; 33 - lower end bearing; 34 - upper end bearing; 35 - second paddle; 36 - first transmission shaft; 37 - third paddle; 38 - first paddle; 39 - second transmission shaft; O1 - center of rotating shaft cross section circle; O2 - center of circle where first paddle outer arc is located; a - central angle of first paddle. DETAILED DESCRIPTION

[0049] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, wherein the drawings form a part of the present application and are used together with the embodiments of the utility model to explain the principles of the utility model, but are not used to limit the scope of the utility model.

[0050] The utility model discloses a concrete embodiment of a kind of molten metal reaction kettle 1, including through gas-liquid passage 3 intercommunication first molten metal reaction kettle 1 and second molten metal reaction kettle 2;

[0051] The first molten metal reaction kettle 1 is provided with a first metal pool 101 inside, and the second molten metal reaction kettle 2 is provided with a second metal pool 201 inside, wherein the bottom of the second metal pool 201 is higher than the bottom of the first metal pool 101, and the first molten metal reaction kettle 1 and the second molten metal reaction kettle 2 are arranged horizontally and staggered.

[0052] The difference between the second molten metal reaction kettle 2 and the metal pool of the first molten metal reaction kettle 1 can not only ensure that the first molten metal reaction kettle 1 has sufficient reaction molten pool volume to maintain the gasification reaction, but also ensure that the gas generated in the first molten metal reaction kettle 1 enters the bottom of the molten metal in the second molten metal reaction kettle 2, and the second molten metal reaction kettle 2 has sufficient molten pool height to ensure sufficient reaction, so as to ensure that the macromolecular gas which does not fully contact with the iron liquid in the first molten metal reaction kettle 1 fully contacts with the iron liquid in the second molten metal reaction kettle 2, and ensures that it is completely gasified into inorganic matter without macromolecular gas.

[0053] Preferably, the gas-liquid passage 3 is a semi-conical passage, and the axial section of the semi-conical passage is higher than the curved surface of the semi-conical passage.

[0054] Further, the semi-conical passage includes a passage inlet, a passage main body and a passage outlet, the passage inlet is communicated with the first molten metal reaction kettle, and the passage outlet is communicated with the second molten metal reaction kettle; the passage inlet and the passage outlet are both semicircular in shape, the diameter of the passage inlet is larger than the diameter of the passage outlet, and the center lines of the two are collinearly aligned.

[0055] Specifically, there is a distance between the center line of the passage inlet and the bottom of the first molten metal reaction kettle, and the bottom arc of the passage outlet is attached to the kettle bottom of the second molten metal reaction kettle.

[0056] Preferably, the distance between the center line of the passage inlet and the bottom of the first molten metal reaction kettle is determined according to the volume of the first metal pool and the liquid level of the molten metal in the first metal pool, and when the first metal pool is filled with molten metal, the top of the passage inlet is flush with the molten metal liquid level.

[0057] In a possible design, the volume of the first metal pool 101 is 56 cubic meters, and the distance between the upper end surface of the passage inlet and the bottom of the first metal pool 101 in the first molten metal reaction kettle 1 is 2 meters.

[0058] The channel body includes a primary molten metal reactor sidewall section and a secondary molten metal reactor sidewall section, the channel inlet is formed in the inner sidewall of the primary molten metal reactor 1, and the channel outlet is formed in the inner sidewall of the secondary molten metal reactor 2.

[0059] It should be noted that the axial section of the channel body is semicircular, wherein the diameter of the semicircle gradually decreases from the channel inlet to the channel outlet, the straight edge of the channel body is horizontally placed, and the circular arc edge smoothly transitions from the channel inlet to the channel outlet, forming a gradually narrowing tapered path.

[0060] In a possible design, the channel inlet is a semicircle with a diameter of 1.8-2 meters in cross section, and the channel outlet is a semicircle with a diameter of 0.6-0.8 meters in cross section.

[0061] Further, the top of the primary molten metal reactor 1 is provided with a feed inlet 102, a first gasification agent lance mounting port 601, and a second gasification agent lance mounting port 602; the top of the secondary molten metal reactor 2 is provided with a synthesis gas outlet 9; the upper part of the outer sidewall of the secondary molten metal reactor 2 is further provided with a third gasification agent lance mounting port 7 and a biomass lance mounting port 8; and the upper part of the second metal pool 201 of the secondary molten metal reactor 2 is provided with a slag pool 202.

[0062] Specifically, when the molten metal reactor system is in operation, the material freely falls into the first metal pool 101 through the feed inlet 102 at the top of the primary molten metal reactor 1 (the falling height is 3-3.5 meters), while the gasification agent is sprayed to the falling position through the first gasification agent lance 14 and the second gasification agent lance 15, the material is mixed with the molten metal by impact to perform the primary gasification reaction, so that the material is fully reacted and rapidly gasified to generate the first mixed gas; the rapid and large amount of generation of the first mixed gas (the reaction time is within 0.1 seconds) increases the internal pressure of the primary molten metal reactor 1 (the internal pressure of the reactor is 1.5-1.8 MPa), thereby increasing the pressure difference between the primary molten metal reactor 1 and the secondary molten metal reactor 2 (e.g., 0.2-0.6 MPa), under the action of the pressure difference, the first mixed gas is sprayed to the bottom of the second metal pool 201 of the secondary molten metal reactor 2 through the gas-liquid channel 3, and the gasification agent is sprayed to the second metal pool 201 through the third gasification agent lance 12 and / or the biomass powder is sprayed to the second metal pool 201 through the biomass lance 13, the first mixed gas is subjected to secondary complete decomposition from the bottom to the top through the molten metal layer and the slag pool, thereby obtaining the inorganic mixed gas.

[0063] It should be noted that when the first mixed gas is sprayed from the primary molten metal reactor 1 to the bottom of the second metal pool 201 of the secondary molten metal reactor 2 through the gas-liquid passage 3 under the action of pressure, the iron liquid in the first metal pool 101 is pressed to the semicircular arc bottom of the passage outlet of the inner side wall of the secondary molten metal reactor 2, but cannot be pressed further; the space of the passage inlet section is significantly larger than the passage space of the passage outlet section, and such a design is beneficial to the accelerated flow of the gas.

[0064] The utility model discloses the communication design of different height metal pool, and the minimum cross-sectional area of passage is filled with iron liquid completely, which prevents the accumulation of block materials and the possible blockage problem on the one hand, and ensures that the gas exchange between the two reactors before the reaction cannot be carried out on the other hand.

[0065] In a possible design, the volume of the first metal pool 101 is 56 cubic meters, the volume of the second metal pool 201 is 25 cubic meters, the height difference between the bottom of the second metal pool 201 and the top of the primary metal pool 101 is 2 meters, and the material processing capacity is 80-100 tons per hour.

[0066] In a possible design, the first gasification agent lance mounting port 601 and the second gasification agent lance mounting port 602 are symmetrically arranged at 180°, and the included angle with the horizontal direction is 45°, and the axes of the first gasification agent lance mounting port 601 and the second gasification agent lance mounting port 602 pass through the cross-sectional center point of the first metal pool 101.

[0067] In a possible design, the third gasification agent lance mounting port 7 and the biomass lance mounting port 8 are symmetrically arranged at 180°, and the included angle with the horizontal direction is 60°, and the axes of the third gasification agent lance mounting port 7 and the biomass lance mounting port 8 pass through the cross-sectional center point of the second metal pool 201.

[0068] Preferably, the primary molten metal reactor 1 further comprises a liquid discharge port 4 of the outer side wall of the reactor body, which is located at the bottom of the first metal pool 101 and is used for discharging the molten metal in the metal pool.

[0069] Specifically, the secondary molten metal reactor 2 further comprises a lower slag discharge port 503, a middle slag discharge port 502 and an upper slag discharge port 501 of the outer side wall of the reactor body. The lower slag discharge port 503, the middle slag discharge port 502 and the upper slag discharge port 501 correspond to the upper liquid level, the middle liquid level and the lower liquid level of the liquid in the slag liquid pool 202, respectively.

[0070] The upper slag discharge port 501 is used for periodically discharging the ash brought by the material; the middle slag discharge port 502 is used for discharging part of the slag liquid in the slag liquid pool when replacing the gasification agent lance; and the lower slag discharge port 503 is used for discharging all the slag liquid in the slag liquid pool when stopping the furnace.

[0071] In one possible design, the synthesis gas outlet 9 has a cross-sectional area of 0.8-1 m 2 The product inorganic mixed gas outlet velocity is 30-35 m / s.

[0072] Preferably, the primary molten metal reactor 1 and the secondary molten metal reactor 2 are each provided with a molten channel 11 below the first metal pool 101 and the second metal pool 201.

[0073] Illustratively, the primary molten metal reactor 1 and the secondary molten metal reactor 2 are each provided with an electromagnetic induction externally supplied heating device on the inner side wall.

[0074] The molten metal reactor of the utility model uses molten metal as a heat source and can use electromagnetic vortex to heat and maintain the heat of the metal pool.

[0075] Further, the primary molten metal reactor 1 and the secondary molten metal reactor 2 are each provided with an infrared temperature measuring instrument on the top, and an iron liquid observation communicating vessel on the side wall, and the liquid level information is obtained through electromagnetic correlation.

[0076] Illustratively, the material containing high molecular compounds is subjected to a decomposition gasification reaction in the molten metal reaction system to generate inorganic mixed gas, and the decomposition gasification reaction process is as follows:

[0077] S1-1, the material is dropped from the top of the primary molten metal reactor 1, and at the same time, the gasification agent is sprayed onto the upper end of the liquid surface of the first metal pool 101 through the gasification agent spray gun above the primary molten metal reactor 1, and the material is subjected to a primary gasification reaction under the action of the molten metal and the gasification agent, and a first mixed gas is obtained after the reaction;

[0078] S1-2, the first mixed gas is sprayed into the bottom of the molten metal of the secondary molten metal reactor 2 through the gas-liquid passage, and is subjected to a secondary gasification reaction upwards through the molten metal layer and the slag liquid layer to obtain inorganic mixed gas.

[0079] Preferably, when the material is only biomass powder, the decomposition gasification reaction process is as follows: the biomass powder and the gasification agent are respectively sprayed into the bottom of the molten metal through the biomass spray gun 13 and the gasification agent spray gun above the secondary molten reactor 2, and are subjected to a decomposition gasification reaction under the action of the molten metal and the gasification agent, and inorganic mixed gas is obtained after the reaction.

[0080] Further, the purified inorganic mixed gas enters the rear-end reaction system to perform Fischer-Tropsch synthesis to produce green methanol, green SAF aviation coal, and green high-quality plastic and other green products.

[0081] In another aspect, the utility model discloses a kind of gasification systems based on molten metal for realizing the gasification method, including feeding and preheating material system, gasification agent supply system, through pipeline sequentially connected molten metal reaction system, synthesis gas purification and heat exchange system, synthesis gas storage system;The feeding and preheating material system is connected with molten metal reaction system inlet by sealing interface;The gasification agent supply system includes superheated steam boiler and / or oxygen tank, and the outlet of both is connected with the gasification agent lance of molten metal reaction system respectively.

[0082] Further, the feeding and preheating material system includes feeding tank 19, mutually parallel inverted tank A16 and inverted tank B17, and first screw conveyor 18, second screw conveyor 19, the discharge port of inverted tank A16 and inverted tank B17 is connected with the first screw conveyor 18 inlet respectively by pipeline, the first screw conveyor 18 outlet is connected with the feeding tank 19 feed inlet by pipeline, the feeding tank 19 blanking port is connected with the second screw conveyor 20 inlet by pipeline, and the second screw conveyor 20 outlet is connected with external equipment by sealing interface.

[0083] Preferably, inverted tank A16 and B17 are designed as backup for each other, to ensure that material continuous conveying can be maintained when single tank body fails, and flexible switching according to production demand can be realized, to reduce downtime and improve production efficiency.

[0084] Further, the feeding tank 19 includes tank body 21, heat exchange jacket 23 arranged outside tank body 21, rotating shaft 29 arranged along the height direction of tank body 21 and penetrating tank body 21, and poking piece arranged along the axial direction of rotating shaft 29.

[0085] The poking piece includes outer poking piece and inner poking piece, wherein the outer poking piece and the inner poking piece are arranged alternately along the axial direction of the rotating shaft 29.

[0086] The projection of the outer poking piece and the inner poking piece on the radial plane of the rotating shaft 29 does not overlap.

[0087] It should be noted that, in the outer poking piece and the inner poking piece, the outer side and the inner side are relative, for qualitatively describing the distance of the poking piece from the rotating shaft.

[0088] Specifically, the outer poking piece and the inner poking piece are fixedly arranged on the rotating shaft 29.As shown in Figures 8-22

[0089] Further, the inner side paddle includes a plurality of inner side paddle units 30, each of which includes three first paddles 38 arranged uniformly in a circumferential direction around the rotation shaft 29, and the plane of each first paddle 38 forms an angle of 30°-85° with the axis of the rotation shaft 29 and is inclined upward by 10°-60° along the axis of the rotation shaft 29 relative to the radial plane of the rotation shaft 29.

[0090] That is, the edge of the first paddle forms a helical slope of 10°-60° upward along the rotation direction of the rotation shaft 29. This design enables the inner side paddle to effectively push the material outward in the radial direction and upward in the axial direction when the rotation shaft rotates, thereby achieving the mixing of the material and facilitating the uniform heat transfer.

[0091] Preferably, the plane of each first paddle 38 forms an angle of 30°, 40°, 50°, 60°, 75°, 80°, or 85° with the axis of the rotation shaft 29 and is inclined upward by 10°, 20°, 30°, 40°, 45°, 50°, or 60° along the axis of the rotation shaft 29 relative to the radial plane of the rotation shaft 29. The angle of the plane of each first paddle 38 with the axis of the rotation shaft 29 and the angle of the helical slope formed by the edge of each first paddle 38 upward are determined according to the density and particle size of the material.

[0092] It should be noted that the paddle surface of each first paddle 38 is in the shape of an eccentric fan ring, which is a part of an eccentric circular ring formed by two eccentrically different radii, including an inner arc, an outer arc, a long side, and a short side connecting the inner and outer arcs, and has the following geometric characteristics: the circle on which the inner arc of the eccentric fan ring coincides with the outer circumference of the rotation shaft 29, the diameter of the circle on which the outer arc of the eccentric fan ring is 1.5-2.5 times the diameter of the circle on which the inner arc, and the central angle of the eccentric fan ring with the circle on which the inner arc as the center is 90°-120°, not including 120°, as shown in Figure 17 、 Figure 18 The center of the cross section of the rotation shaft is O1, the center of the circle on which the outer arc of the first paddle is O2, and the central angle of the first paddle is a. The design of the eccentric paddle can increase the fluid velocity and effectively suppress the stirring dead zone below the paddle, thereby improving the mixing efficiency.

[0093] The inner arc of each first paddle 38 is in contact with the rotation shaft 29, and the thickness of each first paddle 38 increases along the rotation direction of the rotation shaft 29. The thickness design of the first paddle 38 can reduce the resistance during rotation.

[0094] Further, the outer side paddle includes a plurality of outer side paddle units, each of which includes two second paddles 35 fixedly connected to the rotation shaft 29 by a first transmission shaft 36.

[0095] Specifically, the outer side paddles include outer side upper paddles 31 distributed in the upper region of the rotating shaft 29, the second paddle 35 of the outer side paddle unit of the outer side upper paddles 31 is a rectangular paddle, the angle b1 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°, and the angle c1 between the horizontal axis of the plane of the second paddle 35 and the extension line of the axis of the first transmission shaft 36 thereof is 15°-75°.

[0096] Exemplarily, the outer side paddles include outer side lower paddles 32 distributed in the lower region of the rotating shaft, the second paddle 35 of the outer side paddle unit of the outer side lower paddles 32 is a rectangular paddle, the angle b2 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°, and the angle c2 between the horizontal axis of the plane of the second paddle 35 and the extension line of the axis of the first transmission shaft 36 thereof is 15°-75°, and c2>c1.

[0097] Preferably, b1 is 10°, 20°, 30°, 40°, 45°, 50°, 60°, c1 is 15°, 20°, 30°, 40°, 45°, 50°, 60°, 75°, b2 is 10°, 20°, 30°, 40°, 45°, 50°, 60°, and c2 is 15°, 20°, 30°, 40°, 45°, 50°, 60°, 75°. The angle between the plane of the second paddle 35 and the axis of the rotating shaft 29, the angle between the horizontal axis of the plane of the second paddle 35 and the extension line of the axis of the first transmission shaft 36 thereof, and the difference between c1 and c2 are selected and adjusted according to the density and particle size of the material.

[0098] In a possible design, c1 is 45°, and c2 is 60°.

[0099] It should be noted that, in the projection on the radial plane of the rotating shaft 29, the two first transmission shafts 36 in the outer side paddle unit are arranged in parallel, do not pass through the center of the rotating shaft 29, and are centrally symmetric relative to the center of the rotating shaft 29, thereby ensuring the balance of the structure and the uniform stress of the paddle blades; the first transmission shafts 36 of the plurality of outer side paddle units are arranged in an overlapping manner in the radial direction, i.e., in the projection on the radial plane of the rotating shaft 29, the first transmission shafts 36 at different heights are arranged in the same manner in the radial direction; and the two first paddles 35 in the outer side paddle unit are centrally symmetric relative to the center of the rotating shaft 29.

[0100] Specifically, when the rotating shaft rotates, the outer lower paddle 32 has a larger angle with the extension line of the axis of the corresponding first transmission shaft 36 than the outer upper paddle 31, that is, the outer edge of the paddle is farther away from the inner wall of the tank body, and the inclination of the paddle plane is closer to the center of the tank body. The farther to the lower part, the greater the material pressure, and the more compact the material is pressed, so the angle of the paddle with the tank needs to be larger to reduce the resistance to rotation, and also plays a role in pushing the material inward and upward.

[0101] It should be noted that the number of outer paddles and the division of upper and lower regions are determined according to the diameter of the rotating shaft, the characteristics of the material, and the mixing or conveying requirements to ensure uniform distribution and effective movement of the material around the rotating shaft. The design of the outer paddles is coordinated with the inner paddles to achieve continuous flow of the material around the rotating shaft.

[0102] Further, after the material is fed through the feed port, the rotating shaft 29 continuously rotates in the feeding tank 19 at a speed greater than 60 r / min.

[0103] The rotation of the rotating shaft 29 in combination with the different paddles on the rotating shaft 29, the outer paddles play a role in pushing the material inward and upward, and the inner paddles play a role in pushing the material outward and upward, so that the material in the tank produces an internal and external flow to ensure uniform heating of the material, and the material is constantly turned upward to avoid bridging and clogging of the elastic material.

[0104] Preferably, the feeding tank 19 further comprises a tapered discharge port 27, the upper end of the tapered discharge port 27 is connected below the tank body 21 through a discharge port flange 22, and the lower end of the tapered discharge port 27 is connected with external conveying equipment through a tapered flange 28; the rotating shaft 29 passes through the discharge port flange 22 and the tapered discharge port 27 area, and is fixedly installed inside the tapered flange 28 of the tapered discharge port 27 through a lower end bearing 33 and a lower bearing seat.

[0105] Preferably, the material of the lower end bearing 33 of the rotating shaft 29 is graphite, which can withstand high temperature of 400-500℃, and does not need to be cooled, avoiding taking away heat and not needing to be dynamically sealed, directly sealed in the feeding tank 19, avoiding the difficulty of high temperature sealing.

[0106] Further, the outer paddles further comprise discharge port paddles distributed in the tapered discharge port 27 area of the rotating shaft, the second paddle 35 of the outer paddle unit of the discharge port paddles is an inverted trapezoidal paddle, the angle b3 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°, preferably b3 is 10°, 20°, 30°, 40°, 45°, 50°, 60°. The inverted trapezoidal paddle includes two sides, a long bottom side parallel to the first transmission shaft and a short bottom side, one of the two sides is connected with the first transmission shaft, and the long bottom side is located above the short bottom side.

[0107] The second paddle 35 in the blanking port area is mainly designed to adapt to the conical space in the blanking port area and effectively turn the material in this area.

[0108] Notably, the blanking port flange 22 is provided with a blanking port with a trapezoidal cross-section, which is small at the top and large at the bottom, preventing material from being stuck.

[0109] Preferably, a material shoveling paddle is arranged above the blanking port flange 22, further avoiding material bridging and blocking.

[0110] Specifically, the material shoveling paddle includes two third paddles 37, which are respectively fixedly connected to the rotating shaft 29 through second transmission shafts 39. The third paddles 37 are rectangular paddles, and the included angle b4 between the plane of the third paddles 39 and the axis of the rotating shaft 29 is 60°-85°, preferably 60°, 70°, 75°, 80°, or 85°. The two second transmission shafts 39 are arranged in line, and the line connecting them passes through the center of the cross-section of the rotating shaft 29 at the same height.

[0111] In a possible design, the taper of the conical blanking port 27 is 10°, which improves the flow characteristics of the material and prevents the material from arching or blocking at the blanking port.

[0112] Preferably, the rotating shaft upper end bearing 34 is dynamically sealed at the connection between the top of the material tank body 21 and the material tank body 21. The sealing requirement is that under the condition that the sealing gas pressure is 1.0-1.5 MPa, the leakage amount of the dynamic test is controlled to be ≤0.10 Nm 3 / h at a rotating speed of 0-60 r / min.

[0113] Further, the heat exchange jacket 23 includes an outer shell and a heating coil. The heating coil is wrapped around the outer wall of the material tank body 21, the medium inlet 24 is located at the lower end of the heating coil, and the medium outlet 25 is located at the upper end of the heating coil. The heating coil is used to preheat the material in the material tank body 21.

[0114] Preferably, fins 26 are installed outside the heating coil. The fins can increase the heat exchange area and improve the heat exchange effect.

[0115] In a possible design, the cross-sectional size of the heating coil is 500*300 mm, and the total length is 400 m.

[0116] It is worth noting that the present application is a feeding and preheating system, the pouring tank A16, the pouring tank B17 and the feeding tank 19 have the same structure; the medium inlet of the feeding tank heat exchange jacket is communicated with the external air pipeline for introducing hot air; the medium outlet of the feeding tank heat exchange jacket is connected to the pouring tank A medium inlet and the pouring tank B medium inlet through the pipeline, and the pouring tank A medium outlet and the pouring tank B medium outlet are connected to the external air main pipeline through the pipeline, and the heat exchanged air is sent back to the external air compressor.

[0117] In a possible design, each material conveying channel and heat exchange medium pipeline is equipped with a control valve, and the external air temperature is 750-850 DEG C.

[0118] The present application is a feeding and preheating system, the pouring tank A16, the pouring tank B17 and the feeding tank 19 have the same structure; the medium inlet of the feeding tank heat exchange jacket is communicated with the external air pipeline for introducing hot air; the medium outlet of the feeding tank heat exchange jacket is connected to the pouring tank A medium inlet and the pouring tank B medium inlet through the pipeline, and the pouring tank A medium outlet and the pouring tank B medium outlet are connected to the external air main pipeline through the pipeline, and the heat exchanged air is sent back to the external air compressor.

[0119] In a possible design, the present application is a feeding and preheating system applied to the decomposition and gasification reaction system of recyclable and renewable resources such as household garbage, industrial garbage and biomass, air exchanges heat with 1500 DEG C high-temperature synthesis gas generated by the decomposition and gasification reaction system in the external heat exchanger, and after heat exchange, the air is heated to 750-850 DEG C and enters the feeding and preheating system to preheat the material, realizes waste heat recovery of the product synthesis gas and saves energy consumption.

[0120] In summary, the present application designs a reaction kettle based on molten metal, which adopts two-stage molten metal reaction kettles connected by gas-liquid channels to decompose and gasify materials containing high molecular polymers, the crude gas (gasification gas containing organic components) generated by the primary molten metal reaction kettle is sprayed into the bottom layer of the secondary molten metal reaction kettle through the gas-liquid channel, and the crude gas is further decomposed by the high-temperature iron liquid layer and the high-temperature slag liquid layer of the secondary molten metal reaction kettle to be completely decomposed into inorganic mixed gas, ensuring that no high molecular escapes, and the purified mixed gas is: more than 90% of the volume fraction of synthesis gas (CO+H2), the balance is CO2, and the purified mixed gas can enter the subsequent processing stage, for example, producing green methanol, sustainable aviation fuel (SAF), and high-quality green plastic and other environmentally friendly products through the Fischer-Tropsch synthesis reaction, which helps to gradually reduce the dependence on disposable petrochemical resources.

[0121] The molten metal reactor and the gasification method based on the molten metal are described below in combination with specific embodiments.

[0122] Embodiment 1

[0123] This embodiment provides a molten metal reactor and a gasification system based on the molten metal reactor, as shown in Figures 1-3 and Figure 23 .

[0124] The molten metal reactor, as shown in Figure 1 , Figure 2 , Figure 3 , comprises a primary molten metal reactor 1 and a secondary molten metal reactor 2 connected to each other through a gas-liquid passage 3; the primary molten metal reactor 1 is internally provided with a first metal pool 101, and the secondary molten metal reactor 2 is internally provided with a second metal pool 201, wherein the bottom of the second metal pool 201 is higher than the bottom of the first metal pool 101, and the primary molten metal reactor 1 and the secondary molten metal reactor 2 are horizontally staggered.

[0125] The gas-liquid passage 3 is a semi-conical passage, and the axial cross section of the semi-conical passage is higher than the curved surface of the semi-conical passage. The semi-conical passage comprises a passage inlet, a passage main body and a passage outlet, the passage inlet is communicated with the primary molten metal reactor 1, and the passage outlet is communicated with the secondary molten metal reactor 2; the passage inlet and the passage outlet are both semicircular in shape, the diameter of the passage inlet is larger than the diameter of the passage outlet, and the center lines of the two are collinearly aligned. There is a distance between the center line of the passage inlet and the bottom of the primary molten metal reactor 1, and the bottom arc of the passage outlet is in close contact with the bottom of the secondary molten metal reactor 2.

[0126] The top of the primary molten metal reactor 1 is provided with a feeding port 102, a first gasification agent lance mounting port 601 and a second gasification agent lance mounting port 602; the top of the secondary molten metal reactor 2 is provided with a synthetic gas outlet 9; the outer side wall of the secondary molten metal reactor 2 is further provided with a third gasification agent lance mounting port 7 and a biomass lance mounting port 8; the second metal pool 201 of the secondary molten metal reactor 2 is provided with a slag liquid pool 202 above.

[0127] The gasification system, as shown in Figure 23 , comprises a feeding and preheating system, a gasification agent supply system, a molten metal reaction system connected in sequence through a pipeline, a synthetic gas purification and heat exchange system, and a synthetic gas storage system; the feeding and preheating system is connected with the inlet of the molten metal reaction system through a sealing interface; the gasification agent supply system comprises a superheated steam boiler and / or an oxygen tank, and the outlets of the two are respectively connected with the gasification agent lances into the molten metal reaction system.

[0128] The synthesis gas purification and heat exchange system comprises a cyclone dust collector, a heat exchanger, a bag dust collector, a washing tower and an air compressor, the inlet of the cyclone dust collector is connected with the synthesis gas outlet of the secondary molten metal reaction kettle, the outlet of the cyclone dust collector is connected with the hot fluid inlet of the heat exchanger, the hot fluid outlet of the heat exchanger is connected with the bag dust collector and the washing tower in sequence, the outlet of the washing tower is connected with the synthesis gas storage system, and the air compressor is used for conveying air to the cold fluid inlet of the heat exchanger, and the air is conveyed into the heat exchange jacket of the feeding tank through a pipeline after heat exchange.

[0129] The synthesis gas storage system comprises a compressor and a synthesis gas storage tank connected with the outlet of the compressor through a pipeline.

[0130] When the gasification system is used, the material is dropped into the first metal pool 101 of the primary molten metal reaction kettle 1 through the feeding and preheating system, and oxygen is sprayed onto the liquid surface through the first gasification agent spray gun 14 and the second gasification agent spray gun 15 above the primary molten metal reaction kettle 1, the material is subjected to primary gasification reaction under the catalysis of the molten metal, and the first mixed gas is obtained after the reaction, the generation of the first mixed gas in the primary molten metal reaction kettle 1 makes the pressure in the primary molten metal reaction kettle 1 higher than the pressure in the secondary molten metal reaction kettle 2, so that the first mixed gas enters the bottom of the second metal pool 201 of the secondary molten metal reaction kettle 2 through the gas-liquid channel 3 and passes through the molten metal and slag liquid layer, oxygen is sprayed into the second metal pool 201 through the third gasification agent spray gun 12 and / or biomass powder is sprayed into the second metal pool 201 through the biomass spray gun 13, and the inorganic mixed gas is discharged from the synthesis gas outlet 9 to the cyclone dust collector, then enters the synthesis gas purification and heat exchange system after dust removal, is subjected to further dust removal and purification after heat exchange, and finally enters the synthesis gas storage tank.

[0131] The waste heat recovery process of the system is as follows: the high-temperature product synthesis gas enters the heat exchanger through a pipeline, air is sent into the heat exchanger through the air compressor, and after heat exchange, the temperature of the synthesis gas at the hot end outlet is reduced and the temperature of the air at the cold end outlet is increased.

[0132] The molten slag discharge process of the system is as follows: the molten slag is discharged once a day through the upper slag discharge port 501 of the secondary molten metal reaction kettle 2, and the upper slag discharge port 501 is closed after the molten slag is discharged to a specified height.

[0133] Application of the gasification system in the embodiment:

[0134] The material is household garbage, industrial garbage and biomass, the treatment capacity is 100 tons / hour, the gasification agent is oxygen, and the molten metal is iron liquid with a temperature of 1400-1700℃.

[0135] Main design parameters of the molten metal reactor: the volume of the first metal pool 101 is 56 cubic meters, the volume of the second metal pool 201 is 25 cubic meters, the height difference between the bottom of the second metal pool 201 and the top of the first metal pool 101 is 2 meters; the height of the iron liquid in the second molten reactor 2 is 2 meters, and the height of the slag layer is 3 meters; the inlet of the gas-liquid channel 3 is a semicircle with a diameter of 2 meters, and the outlet of the channel is a semicircle with a diameter of 0.8 meters; the cross-sectional area of the synthetic gas outlet 9 is 0.8 m 2 The inlet of the channel is a semicircle with a diameter of 1.8-2 meters, and the distance from the upper end surface of the channel inlet to the bottom of the first metal pool is 2 meters; the outlet of the channel is a semicircle with a diameter of 0.6-0.8 meters.

[0136] When the system is used for the first time: the particle <2 mm iron powder is added to the first metal pool 101 and the second metal pool 201, respectively, and after being heated to a molten state, the dolomite powder and limestone powder are added to the second metal pool 201 to form a slag liquid layer.

[0137] Main design parameters of the decomposition gasification reaction and subsequent processing process: the material is dropped into the molten metal surface of the first metal pool 101 of the first molten metal reactor 1 through the feeding and preheating system, and at the same time, oxygen is sprayed onto the upper end of the liquid surface at a speed of 200 m / s through the first gasification agent spray gun 14 and the second gasification agent spray gun 15 above the first molten metal reactor 1, and the material is catalyzed by the iron liquid to carry out a first gasification reaction, and after the reaction, a first mixed gas is obtained, and the pressure in the first molten metal reactor 1 reaches 1.5 MPa. The first mixed gas enters the bottom of the second metal pool 201 of the second molten reactor 2 through the gas-liquid channel 3 at a speed of 50-150 m / s and passes through the molten metal and the slag liquid layer, and at the same time, the third gasification agent spray gun 12 sprays oxygen at a speed of 200 m / s into the second metal pool 201, and the biomass spray gun 13 sprays biomass powder at a speed of 200 m / s into the second metal pool 201, and the product inorganic mixed gas is discharged from the synthetic gas outlet 9 at a speed of 30-35 m / s to a cyclone dust collector for dust removal, and then enters a synthetic gas purifying agent heat exchange system, and after heat exchange, the temperature is reduced to below 300°C, and further dust removal and purification are carried out, and then the synthetic gas is stored in a tank.

[0138] Main design parameters of the waste heat recovery process: the product inorganic mixed gas at a temperature of 1500°C enters the heat exchanger through the pipeline, and at the same time, the air compressor sends air into the cold end inlet of the heat exchanger, and after heat exchange, the temperature of the inorganic mixed gas at the hot end outlet is 300°C, and the temperature of the air at the cold end outlet is 850°C; the air is sent into the heat exchange jacket 23 on the outer wall of the feeding tank 19 and the material pouring tank to preheat the material to 400°C.

[0139] Example 2

[0140] This embodiment provides a preheating and feeding system. As shown inFigures 4-16 The application is shown in the accompanying drawings.

[0141] The feeding of the decomposition gasification reaction system for recyclable and renewable resources such as household garbage, industrial garbage and biomass.

[0142] The feeding and preheating system comprises a feeding tank A 16, a feeding tank B 17, a feeding tank 19 and a first screw conveyor 18, a second screw conveyor 20, the outlet of the feeding tank A 16 and the outlet of the feeding tank B 17 are connected with the inlet of the first screw conveyor 18 through pipes, the outlet of the first screw conveyor 18 is connected with the inlet of the feeding tank 19 through a pipe, the outlet of the feeding tank 19 is connected with the inlet of the second screw conveyor 20 through a pipe, and the outlet of the second screw conveyor 20 is connected with external equipment through a sealing interface.

[0143] The feeding tank 19 comprises a tank body 21, a heat exchange jacket 23 arranged outside the tank body 21, a rotating shaft 29 arranged along the height direction of the tank body 21 and penetrating the tank body, and a stirring blade arranged along the axial direction of the rotating shaft 29, and the projection of the outer stirring blade and the inner stirring blade on the radial plane of the rotating shaft does not overlap.

[0144] The outer stirring blade and the inner stirring blade are fixedly arranged on the rotating shaft. The inner stirring blade comprises an inner stirring blade unit 30, the inner stirring blade unit 30 comprises three first paddles 38, and the three first paddles 38 are uniformly arranged in the circumferential direction of the rotating shaft 29; the plane of the first paddle 38 forms an angle of 30°-85° with the axis of the rotating shaft 29, and is upwardly inclined by 10°-60° with respect to the radial plane of the rotating shaft 29 along the axis of the rotating shaft 29.

[0145] The outer stirring blade comprises a plurality of outer stirring blade units, and each outer stirring blade unit comprises two second paddles 35, and the second paddles 35 are fixedly connected to the rotating shaft 29 through a first transmission shaft 36.

[0146] The outer stirring blade comprises an outer upper stirring blade 31 arranged in the upper region of the rotating shaft, and the second paddles 35 of the outer stirring blade unit of the outer upper stirring blade 31 are rectangular paddles; the angle b1 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°, and the horizontal axis of the plane of the second paddle 35 forms an angle c1 of 15°-75° with the extension line of the axis of the first transmission shaft 36.

[0147] Exemplarily, the outer side pushing piece includes outer side lower pushing pieces 32 distributed in the lower region of the rotating shaft, the second paddle 35 of the outer side pushing piece unit of the outer side lower pushing piece 32 is a rectangular paddle, the angle b2 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°, and the angle c2 between the horizontal axis of the plane of the second paddle 35 and the extension line of the axis of the first transmission shaft 36 is 15°-75°; and c2>c1.

[0148] The feeding tank 19 further includes a conical material falling port 27, the upper end of the conical material falling port 27 is connected below the tank body 21 through a material falling port flange 22, the lower end of the conical material falling port 27 is connected with external conveying equipment through a necking flange 28; the rotating shaft 29 passes through the material falling port flange 22 and the conical material falling port 27 region, and is fixedly installed inside the necking flange 28 of the conical material falling port 27 through a lower end bearing 33 and a lower bearing seat.

[0149] The outer side pushing piece further includes material falling port pushing pieces distributed in the conical material falling port 27 region of the rotating shaft, the second paddle 35 of the outer side pushing piece unit of the material falling port pushing piece is an inverted trapezoidal paddle, and the angle b3 between the plane of the second paddle 35 and the axis of the rotating shaft 29 is 10°-60°. The inverted trapezoidal paddle includes two side edges, a long bottom edge parallel to the first transmission shaft and a short bottom edge, one of the two side edges is connected with the first transmission shaft, and the long bottom edge is located above the short bottom edge.

[0150] The material falling port flange 22 is provided with a material shoveling pushing piece above, the material shoveling pushing piece includes two third paddles 37, the third paddles 37 are fixedly connected on the rotating shaft 29 through second transmission shafts 39 respectively; the third paddle 37 is a rectangular paddle, the angle b4 between the plane of the third paddle 37 and the axis of the rotating shaft 29 is 60°-85°; the two second transmission shafts 39 are arranged in line, and the line connecting them passes through the center of the cross section of the rotating shaft 29 at the same height.

[0151] The inverted material tank A 16 and the inverted material tank B 17 are the same as the feeding tank 19 in structure, wherein the inverted material tank A 16 and the inverted material tank B 17 are standby for each other.

[0152] The heat exchange jacket 23 includes an outer shell, a heating coil, a medium inlet 24 and a medium outlet 25, the heating coil is wrapped around the outer wall of the tank body 21, and the two ends of the heating coil are connected with the medium inlet 24 and the medium outlet 25 through the outer shell respectively, wherein the medium inlet 24 is located at the lower end of the heating coil, and the medium outlet 25 is located at the upper end of the heating coil; the outer side of the heating coil is provided with fins 26.

[0153] When the feeding and preheating material system is used:

[0154] The material is transported from the external bin to the pouring tank A16 (pouring tank B17 as backup), and the feeding is completed through the feeding port of the pouring tank A16; at the same time, the rotating shaft of the pouring tank A16 is continuously rotated in the feeding tank, and the material falls into the first screw conveyor 18 through the conical discharge port of the pouring tank A16, and then enters the feeding port of the feeding tank 19 from the outlet of the first screw conveyor 18; the rotating shaft of the feeding tank 19 is also continuously rotated, and the material enters the second screw conveyor 20 through the conical discharge port of the feeding tank 19, and is finally transported to the decomposition gasification reaction system; the outlet of the second screw conveyor 20 is connected with the decomposition gasification reaction system through a high-pressure resistant sealing interface, and a water cooling system is arranged outside the high-pressure resistant sealing interface.

[0155] At the same time when the material enters the pouring tank A16, the external air enters the heat exchange jacket 23 of the system through the medium inlet 24 of the heat exchange jacket 23, and after heat exchange, returns to the air compressor through the medium outlet of the pouring tank A16, so as to realize the recycling of the heat exchange air. Before entering the system, the air exchanges heat with the 1500℃ high-temperature synthesis gas generated by the decomposition gasification reaction system in the external heat exchanger, and after heat exchange, the air is heated to 850℃. Before the material enters the decomposition gasification reaction system, the material is preheated to 400℃ through the above heat exchange process.

[0156] Application of the material feeding and preheating system:

[0157] The decomposition gasification reaction system is used for feeding of recyclable and renewable resources such as household garbage, industrial garbage and biomass, and the conveying capacity is 200m 3 / h.

[0158] Main equipment parameters of the system: the diameter of the tank body 21 is 4 meters, the lower diameter of the conical discharge port 27 is 1 meter, and the taper is 10°; the cross-sectional size of the heating coil is 500*300mm, and the total length is 400m; the number of the inner side of the material pushing piece unit is 8; the plane of the first paddle 38 and the axis of the rotating shaft 29 forms an angle of 60°, and simultaneously upwardly uplifts 30° along the axis of the rotating shaft with respect to the radial plane of the rotating shaft 29; b1=b2=b3=30°; b4=60°; c1=45°; c2=60°.

[0159] Main operation parameters of the system: the rotating shaft of the pouring tank and the feeding tank rotates at a speed of 65r / min.

[0160] Main preheating parameters: before entering the system, the air exchanges heat with the 1500℃ high-temperature gas generated by the decomposition gasification reaction system in the external heat exchanger, and after heat exchange, the air is heated to 850℃. Before the material enters the decomposition gasification reaction system, the material is preheated to 400℃ through the above heat exchange process.

[0161] The whole system runs smoothly, and no blockage or bridging phenomenon occurs, and the material temperature is uniformly distributed.

[0162] In conclusion, the utility model discloses a reaction kettle based on molten metal, which is connected by two-stage molten metal reaction kettles through gas-liquid channels, and decomposes and gasifies materials containing high molecular polymers, and the coarse gas (gasification gas containing organic components) generated by the first-stage molten metal reaction kettle is sprayed into the bottom layer of the second-stage molten metal reaction kettle through the gas-liquid channels, and the coarse gas is further decomposed by the high-temperature iron liquid layer and the high-temperature slag liquid layer of the second-stage molten metal reaction kettle to be completely decomposed into inorganic mixed gas, ensuring that no high molecular escapes, and the inorganic mixed gas can enter the subsequent processing stage after further purification, for example, producing green methanol, sustainable aviation fuel (SAF), and high-quality green plastic and other environmentally friendly products through the Fischer-Tropsch synthesis reaction, which helps to gradually reduce the dependence on disposable petrochemical resources.

[0163] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A molten metal reaction vessel characterized by, The first-stage molten metal reactor comprises a feed inlet, a first gasification agent lance installation port and a second gasification agent lance installation port arranged on the top of the reactor, and a first metal pool arranged inside the first-stage molten metal reactor.

2. The reactor of claim 1, wherein The second-stage molten metal reactor comprises a synthetic gas outlet arranged on the top of the reactor, and a second metal pool and a slag pool arranged inside the second-stage molten metal reactor in sequence from bottom to top, wherein the bottom of the second metal pool is higher than the bottom of the first metal pool.

3. The reactor of claim 1, wherein The first gasification agent lance installation port and the second gasification agent lance installation port are symmetrically arranged at an angle of 180° with respect to the horizontal direction, and the angle between the horizontal direction and the axes of the first gasification agent lance installation port and the second gasification agent lance installation port is 45°, and the axes of the first gasification agent lance installation port and the second gasification agent lance installation port pass through the cross-sectional center point of the first metal pool.

4. The reactor of claim 2, wherein, The second-stage molten metal reactor further comprises a lower slag outlet, a middle slag outlet and an upper slag outlet on the outer wall of the reactor body.

5. The reactor of claim 4, wherein, The lower slag outlet, the middle slag outlet and the upper slag outlet correspond to the upper liquid level, the middle liquid level and the lower liquid level of the liquid in the slag pool, respectively.

6. The reactor of claim 2, wherein, The upper part of the outer wall of the second-stage molten metal reactor is further provided with a third gasification agent lance installation port and a biomass lance installation port.

7. The reactor of claim 6, wherein, The third gasification agent lance installation port and the biomass lance installation port are symmetrically arranged at an angle of 180° with respect to the horizontal direction, and the angle between the horizontal direction and the axes of the third gasification agent lance installation port and the biomass lance installation port is 60°, and the axes of the third gasification agent lance installation port and the biomass lance installation port pass through the cross-sectional center point of the second metal pool.

8. The reactor of claim 1, wherein, The first-stage molten metal reactor is connected with the second-stage molten metal reactor through a semi-conical gas-liquid passage.

9. The reactor of claim 8, wherein, The gas-liquid passage comprises a passage inlet, a passage main body and a passage outlet, the passage inlet is connected with the side wall of the first-stage molten metal reactor, and the passage outlet is connected with the side wall of the second-stage molten metal reactor.

10. The reactor of claim 8, wherein, The top of the first-stage molten metal reactor and the top of the second-stage molten metal reactor are both provided with an infrared temperature measuring instrument.

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