Feeding tank and feeding and preheating system

Abstract

The utility model relates to a feeding tank and a feeding and preheating system, belongs to the technical field of recycling of recyclable and renewable resources such as household garbage, industrial garbage and biomass, and solves the problems that in the prior art, a feeding system of existing gasification equipment is prone to material blockage and uneven in material preheating, and waste heat of the system cannot be recycled. The feeding tank comprises a material tank body, a vertical stirring system is arranged at the axial center of the material tank body, and the vertical stirring system comprises a rotating shaft and material stirring pieces arranged in the axial direction of the rotating shaft. And the fluidity and the preheating effect of the material are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the reusing technical field based on recyclable, renewable resources such as domestic waste, industrial waste and biomass etc. BACKGROUND

[0002] At present, the technology for realizing harmless, resourceful and energyful utilization of biomass (a renewable resource) and low-quality waste plastics (a recyclable resource) is mainly pyrolysis gasification technology.

[0003] In the existing gasification furnace or pyrolysis furnace technology, the feeding system is the key link for realizing continuous and stable supply of materials. On the one hand, since the decomposition gasification process requires to be carried out under high pressure, a reverse feeding tank is used to ensure high-pressure sealing. The traditional reverse feeding tank relies on gravity or pressurization to transport materials. This method will cause bridging and plugging when transporting elastic materials, which is difficult to overcome. On the other hand, in order to improve the gasification efficiency, the biomass, low-quality waste plastics and other materials need to be preheated before entering the gasification equipment. A horizontal preheating tank is mainly used, and a rotary kiln is mainly used. This facilitates uniform heating of the materials. However, the preheated materials are ground into powder, and the temperature is reduced again, which wastes heat energy. Finally, if the organic matter in the materials is heated to about 400℃, decomposition will occur, and complex decomposition gas will be produced. Since there is no special integrated equipment, if the decomposition gas is introduced into the gasification equipment, the pipeline for introducing the decomposition gas will inevitably be coked and blocked. At present, the decomposition gas is treated by burning, which not only wastes resources but also pollutes the environment. CONTENT OF THE UTILITY MODEL

[0004] In view of the above analysis, the utility model aims to provide a feeding tank and a feeding and preheating system to solve at least one of the problems of the existing gasification equipment, such as easy plugging of the feeding system, uneven preheating of the materials and inability to recover waste heat.

[0005] The utility model mainly aims to realize the following technical scheme:

[0006] A feeding tank, comprising a tank body, a vertical stirring system is arranged at the axial center of the tank body, and the vertical stirring system comprises a rotating shaft and a material stirring piece arranged along the axial direction of the rotating shaft.

[0007] Further, the material stirring piece comprises an inner material stirring piece and an outer material stirring piece, the inner material stirring piece comprises a plurality of inner material stirring piece units, each inner material stirring piece unit comprises three first paddles uniformly connected to the outer periphery of the rotating shaft, the outer material stirring piece comprises a plurality of outer material stirring piece units, each outer material stirring piece unit comprises a first transmission shaft connected to the rotating shaft and a second paddle mounted on the free end of the transmission shaft.

[0008] Specifically, the paddle surface shape of the first paddle is an eccentric fan ring, the eccentric fan ring is a part of an eccentric ring formed by two eccentric different-diameter circles, including an inner arc, an outer arc, a long side and a short side connecting the inner arc and the outer arc; the circle where the inner arc of the eccentric fan ring is located is coincided with the outer circle of the rotation axis, the diameter of the circle where the outer arc of the eccentric fan ring is located is 1.5-2.5 times of the diameter of the circle where the inner arc is located, the central angle of the eccentric fan ring with the circle where the inner arc is located as the center is 90-120 degrees, not including 120 degrees.

[0009] It should be noted that the outer side pushing pieces and the inner side pushing pieces are arranged alternately along the rotation axis in the axial direction.

[0010] Preferably, the angle between the plane of the paddle of the outer side pushing piece and the extension line of the first transmission shaft axis is different at different axial positions on the rotation axis.

[0011] Specifically, the second paddle plane of the outer side upper pushing piece located in the upper region of the rotation axis forms an angle of 15-75 degrees with the extension line of the first transmission shaft axis thereof.

[0012] Illustratively, the second paddle plane of the outer side lower pushing piece located in the lower region of the rotation axis forms an angle of 15-75 degrees with the extension line of the first transmission shaft axis thereof.

[0013] Further, the plane of the second paddle forms an angle of 10-60 degrees with the axis of the rotation axis.

[0014] Preferably, the plane of the first paddle forms an angle of 30-85 degrees with the axis of the rotation axis, and is upwardly inclined along the axis of the rotation axis by 10-60 degrees with respect to the radial plane of the rotation axis.

[0015] On the other hand, the utility model also provides a kind of feeding and preheating system, including the feeding tank of the utility model.

[0016] Compared with prior art, the utility model can at least realize following beneficial effects one of:

[0017] 1, the utility model adds stirring system in vertical tank, avoid the problem of elastic material bridging and plugging on the one hand, solve the problem of uneven preheating of vertical tank on the other hand.

[0018] 2, the utility model adopts the design of vertical tank, and multiple groups of pushing piece units are arranged along the longitudinal direction of the rotation axis, based on the angle setting of the paddle of pushing piece unit, and combined with the rotation of the rotation axis, when pushing piece is pushed, on the one hand, part of material is pushed to the center of tank, and material is loosened upward, on the other hand, part of material is pushed to the outer wall of tank, promote the flow between inside and outside of material, promote heat exchange, ensure that material is heated uniformly, and meanwhile, material is constantly turned upward, which can effectively avoid the bridging and plugging of elastic material.

[0019] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0020] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0021] Figure 1 This is a diagram of the external heat exchange system of the feeding tank of this utility model;

[0022] Figure 2 This utility model Figure 1 Enlarged view of a portion of point A in the middle;

[0023] Figure 3 This is a longitudinal sectional view of the feeding tank of this utility model;

[0024] Figure 4 This is a front view of the rotating shaft and the feeding plate of this utility model;

[0025] Figure 5 This is a top view of the inner material feeding plate unit and the rotation axis of this utility model;

[0026] Figure 6 This is a front view of the first propeller blade of this utility model;

[0027] Figure 7 This is a top view of the upper outer part of the upper region of the rotating shaft and the rotating shaft of this utility model;

[0028] Figure 8 This is a top view of the lower outer part of the rotating shaft and the rotating shaft of this utility model;

[0029] Figure 9 This is a top view of the upper section of the tapered discharge port area and the rotating shaft of the present invention.

[0030] Figure 10 This is a top view of the material scraper and rotating shaft of this utility model;

[0031] Figure 11 This is a top view of the material discharge flange of this utility model;

[0032] Figure 12 This is a three-dimensional structural diagram of the conical discharge port, discharge port flange, and scraper blade of this utility model.

[0033] Figure 13 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown Figure 1 ;

[0034] Figure 14 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown Figure 2 ;

[0035] Figure 15 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0036] Figure 16 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0037] Figure 17 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0038] Figure 18 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0039] Figure 19 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0040] Figure 20 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0041] Figure 21 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0042] Figure 22 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0043] Figure 23 For the utility model inside the angle relation of the planar view angle inside the poking piece unit is shown

[0044] Reference signs:

[0045] 1 - primary molten metal reactor; 101 - first metal pool; 102 - feed inlet; 2 - secondary molten metal reactor; 201 - second metal pool; 202 - slag pool; 3 - gas-liquid passage; 4 - liquid outlet; 501 - upper slag outlet; 502 - middle slag outlet; 503 - lower slag outlet; 601 - first gasification agent lance installation port; 602 - second gasification agent lance installation port; 7 - third gasification agent lance installation port; 8 - biomass lance installation port; 9 - synthetic gas outlet; 10 - second screw conveyor; 11 - molten channel; 12 - third gasification agent lance; 13 - biomass lance; 14 - first gasification agent lance; 15 - second gasification agent lance; 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 - inner side raking blade unit; 31 - outer side upper raking blade; 32 - outer side lower raking blade; 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 outer arc of first paddle is located; a - central angle of first paddle. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of this application and illustrate the principles of the present application together with the embodiments thereof, and are used for explaining the scope of the present application.

[0047] In one embodiment of the present application, a feeding tank 19 is disclosed, which comprises a tank body 21, and a vertical stirring system is arranged at the axial center of the tank body 21, wherein the vertical stirring system comprises a rotating shaft 29 and raking blades arranged along the axial direction of the rotating shaft.

[0048] The feeding tank 19 further comprises a heat exchange jacket 23 arranged outside the tank body 21.

[0049] The raking blades comprise outer side raking blades and inner side raking blades, wherein the outer side raking blades and the inner side raking blades are arranged alternately along the axial direction of the rotating shaft.

[0050] The projections of the outer side raking blades and the inner side raking blades on the radial plane of the rotating shaft do not overlap.

[0051] It should be noted that, in the outer side raking blades and the inner side raking blades, the outer side and the inner side are relative, and are used for qualitatively describing the distance of the raking blades from the rotating shaft.

[0052] Specifically, the outer side scraping piece and the inner side scraping piece are fixedly arranged on the rotating shaft 29. Figures 1 to 19

[0053] Further, the inner side scraping piece comprises a plurality of inner side scraping piece units 30, each of which comprises three first paddles 38 arranged uniformly 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 raised upward along the axis of the rotating shaft 29 by an angle of 10°-60° with respect to the radial plane of the rotating shaft 29.

[0054] That is, along the direction of rotation of the rotating shaft 29, the edge of the first paddle forms a spiral slope upward by an angle of 10°-60°. This design enables the inner side scraping piece to effectively push the material outward in the radial direction and upward in the axial direction when the rotating shaft rotates, thereby achieving mixing of the material and facilitating uniform heat transfer.

[0055] Preferably, the plane of the first paddle 38 forms an angle of 30°, 40°, 50°, 60°, 75°, 80°, 85° with the axis of the rotating shaft 29, and is raised upward along the axis of the rotating shaft 29 by an angle of 10°, 20°, 30°, 40°, 45°, 50°, 60° with respect to the radial plane of the rotating shaft 29. The angle of the plane of the first paddle 38 with the axis of the rotating shaft 29 and the angle of the spiral slope upward formed by the edge of the first paddle 38 are determined according to the density and particle size of the material.

[0056] It should be noted that the paddle surface of the 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 arc and the outer arc, and has the following geometric characteristics: the circle on which the inner arc of the eccentric fan ring is located coincides with the outer circumference of the rotating shaft 29, the diameter of the circle on which the outer arc of the eccentric fan ring is located is 1.5-2.5 times the diameter of the circle on which the inner arc is located, the central angle of the eccentric fan ring with the center of the inner arc as the center is 90°-120°, not including 120°, as shown in Figure 13 Figure 14 The center of the cross section of the rotating shaft is O1, the center of the circle on which the outer arc of the first paddle is located 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.

[0057] The inner arc of the first paddle 38 is in contact with the rotating shaft 29, and the thickness of the first paddle 38 increases along the direction of rotation of the rotating shaft 29. The thickness design of the first paddle 38 can reduce the resistance during rotation.

[0058] ​​Further, the outer side material-pushing piece comprises a plurality of outer side material-pushing piece units, each of which comprises two second paddles 35 fixedly connected to the rotating shaft 29 by a first transmission shaft 36.

[0059] Specifically, the outer side material-pushing piece comprises an outer side upper material-pushing piece 31 distributed in the upper region of the rotating shaft 29, the second paddle 35 of the outer side material-pushing piece unit of the outer side upper material-pushing piece 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 is 15°-75°.

[0060] Specifically, the outer side material-pushing piece comprises an outer side upper material-pushing piece 31 distributed in the upper region of the rotating shaft 29, the second paddle 35 of the outer side material-pushing piece unit of the outer side upper material-pushing piece 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 is 15°-75°.

[0061] Preferably, b1 is 10°, 20°, 30°, 40°, 45°, 50°, or 60°, c1 is 15°, 20°, 30°, 40°, 45°, 50°, 60°, or 75°, b2 is 10°, 20°, 30°, 40°, 45°, 50°, or 60°, and c2 is 15°, 20°, 30°, 40°, 45°, 50°, 60°, or 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, and the difference between c1 and c2 are selected and adjusted according to the density and particle size of the material.

[0062] In one possible design, c1 is 45° and c2 is 60°.

[0063] 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 material-pushing piece 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 paddles; the first transmission shafts 36 of the plurality of outer side material-pushing piece units are arranged in an overlapping radial manner, i.e., in the projection on the radial plane of the rotating shaft 29, the first transmission shafts 36 of different heights are arranged in the same radial manner; and the two first paddles 35 in the outer side material-pushing piece unit are centrally symmetric relative to the center of the rotating shaft 29.

[0064] 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.

[0065] 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.

[0066] Further, after the material is fed through the feed inlet, the rotating shaft 29 continuously rotates in the feeding tank 19 at a speed greater than 60 r / min.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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 plane of the second paddle 35 forms an angle b3 of 10°-60° with the axis of the rotating shaft 29, 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.

[0071] 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.

[0072] 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.

[0073] Preferably, a material shoveling paddle is arranged above the blanking port flange 22, further preventing material from bridging and blocking.

[0074] 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.

[0075] 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.

[0076] Preferably, the upper end bearing 34 of the rotating shaft is dynamically sealed at the connection with the top of the tank body 21, and the sealing requirement is that the leakage amount of the dynamic test is controlled to be ≤0.10 Nm3 / h at a rotational speed of 0-60 r / min under the condition that the sealing gas pressure is 1.0-1.5 MPa.

[0077] 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 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 tank body 21.

[0078] Preferably, fins 26 are installed outside the heating coil. The fins can increase the heat exchange area and improve the heat exchange effect.

[0079] In a possible design, the cross-sectional size of the heating coil is 500*300 mm, and the total length is 400 m.

[0080] In another aspect, the utility model discloses a kind of feeding and preheating material systems, including the feeding tank 19 of the described, mutually parallel inverted tank A16 and inverted tank B17, and first screw conveyor 18, second screw conveyor 19, the outlet of inverted tank A16 and inverted tank B17 is respectively connected with the first screw conveyor 18 inlet 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.

[0081] Notably, in the feeding and preheating material system of the utility model, inverted tank A16, inverted tank B17 and feeding tank 19 are the same structure;The medium inlet 24 of the heat exchange jacket 23 of the feeding tank 19 is communicated with external air pipeline, for introducing hot air;The medium outlet 25 of the heat exchange jacket 23 of the feeding tank 19 is connected to inverted tank A medium inlet and inverted tank B medium inlet by pipeline respectively, and inverted tank A medium outlet and inverted tank B medium outlet are connected to external air main pipe by pipeline, and the air after heat exchange is sent back to external air compressor.

[0082] In a possible design, control valves are provided on each material conveying channel and heat exchange medium pipeline, and the external air temperature is 750-850 DEG C.

[0083] In another aspect, the utility model discloses a kind of gasification systems based on molten metal, including the feeding and preheating material system, gasification agent supply system, by 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 respectively connected with the gasification agent spray gun that enters molten metal reaction system.

[0084] Further, the molten metal reaction system includes first molten metal reaction kettle 1 and second molten metal reaction kettle 2 communicated by gas-liquid passage 3;The first molten metal reaction kettle 1 is equipped with first metal pool 101, and the second molten metal reaction kettle 2 is equipped with second metal pool 201, wherein the bottom of second metal pool 201 is higher than the bottom of first metal pool 101, and the first molten metal reaction kettle 1 and the second molten metal reaction kettle 2 are staggered horizontally.

[0085] The difference between the secondary molten metal reactor 2 and the primary molten metal reactor 1 can ensure that the primary molten metal reactor 1 has sufficient reaction pool volume to maintain the gasification reaction, and the gas generated in the primary molten metal reactor 1 can enter the bottom of the molten metal in the secondary molten metal reactor 2, and the secondary molten metal reactor 2 has sufficient pool height to ensure sufficient reaction, so that the macromolecular gas which does not fully contact with the iron liquid in the primary molten metal reactor 1 fully contacts with the iron liquid in the secondary molten metal reactor 2, ensuring complete gasification into inorganic matter without macromolecular gas.

[0086] 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.

[0087] Further, the semi-conical passage includes a passage inlet, a passage main body and a passage outlet, the passage inlet is in communication with the primary molten metal reactor, and the passage outlet is in communication with the secondary molten metal reactor; the passage inlet and the passage outlet are both semicircular, 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.

[0088] Specifically, the center line of the passage inlet is away from the bottom of the primary molten metal reactor, and the bottom arc of the passage outlet is in contact with the bottom of the secondary molten metal reactor.

[0089] Preferably, the distance between the center line of the passage inlet and the bottom of the primary molten metal reactor 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 liquid level of the molten metal.

[0090] 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 primary molten metal reactor 1 is 2 meters.

[0091] The passage main body includes a primary molten metal reactor sidewall section and a secondary molten metal reactor sidewall section, the passage inlet is formed in the sidewall of the primary molten metal reactor 1, and the passage outlet is formed in the sidewall of the secondary molten metal reactor 2.

[0092] It should be noted that the axial section of the passage main body is semicircular, wherein the diameter of the semicircle gradually decreases from the passage inlet to the passage outlet, the straight edge of the passage main body is horizontally placed, and the circular arc edge smoothly transitions from the passage inlet to the passage outlet, forming a gradually narrowing conical path.

[0093] In a possible design, the passage inlet is a semicircle with a diameter of 1.8-2 meters, and the passage outlet is a semicircle with a diameter of 0.6-0.8 meters.

[0094] 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 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; the top of the second metal pool 201 of the secondary molten metal reactor 2 is provided with a slag pool 202.

[0095] Specifically, when the molten metal reactor system is running, the material falls freely through the feed inlet 102 at the top of the primary molten metal reactor 1 into the first metal pool 101 (the material falling height is 3-3.5 meters), while the gasification agent is sprayed to the material falling position through the first gasification agent lance 14 and the second gasification agent lance 15, so as to impact and mix the material with the molten metal 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 generation of the first mixed gas (the reaction time is within 0.1 second) 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 (for example, 0.2-0.6 MPa), and 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 passage 3, while 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, and the first mixed gas is subjected to secondary complete decomposition from the bottom to the top through the molten metal layer and the slag layer to obtain the inorganic mixed gas.

[0096] It should be noted that when the first mixed gas is sprayed to the bottom of the second metal pool 201 of the secondary molten metal reactor 2 from the primary molten metal reactor 1 through the gas-liquid passage 3 under the action of the pressure, the iron liquid in the first metal pool 101 is pressed to the semicircular arc bottom of the passage outlet of the inner sidewall of the secondary molten metal reactor 2, but cannot be further pressed; the passage space of the passage inlet section is significantly larger than that of the passage outlet section, and such a design is beneficial to the accelerated flow of the gas.

[0097] The utility model discloses the design of the metal pool of different height is connected, and the minimum cross-sectional area of the passage is completely filled with the iron liquid, which on the one hand effectively prevents the accumulation of the blocky material and the possible plugging problem; on the other hand, ensures that the reaction cannot be carried out between the two reactors before the reaction.

[0098] 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.

[0099] In a possible design, the first gasification agent lance mounting port 601 and the second gasification agent lance mounting port 602 are arranged in 180° symmetry, and the included angle with the horizontal direction is 45°, and 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.

[0100] In a possible design, the third gasification agent lance mounting port 7 and the biomass lance mounting port 8 are arranged in 180° symmetry, and the included angle with the horizontal direction is 60°, and 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.

[0101] Preferably, the primary molten metal reactor 1 further comprises a liquid discharge port 4 on the outer wall of the reactor body, which is located at the bottom of the first metal pool 101 and used for discharging the molten metal in the metal pool.

[0102] 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 on the outer 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 slag-liquid pool 202 respectively.

[0103] 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.

[0104] In a possible design, the cross-sectional area of the synthetic gas outlet 9 is 0.8-1 m 2 , and the product inorganic mixed gas outlet speed is 30-35 m / s.

[0105] Preferably, the reactor bottom of the primary molten metal reactor 1 and the secondary molten metal reactor 2 is provided with a molten channel 11, and the molten channel 11 is located below the first metal pool 101 and the second metal pool 201.

[0106] Exemplarily, the inner wall of the primary molten metal reactor 1 and the secondary molten metal reactor 2 is provided with an electromagnetic induction external heating device.

[0107] The molten metal reactor disclosed by the utility model takes molten metal as a heat source, can use the electromagnetic vortex method for heating, and maintains the heat of the metal pool.

[0108] Further, the top of the primary molten metal reactor 1 and the secondary molten metal reactor 2 is provided with an infrared temperature detector; the sidewall of the primary molten metal reactor 1 and the secondary molten metal reactor 2 is provided with an iron liquid observation communication device, and liquid level information is obtained through electromagnetic association.

[0109] Exemplarily, 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:

[0110] 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 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;

[0111] 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 upward through the molten metal layer and the slag liquid layer to obtain inorganic mixed gas.

[0112] 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.

[0113] The two-stage molten metal reactor connected by the gas-liquid passage is used to carry out a decomposition gasification reaction on the material containing high molecular polymers. The primary molten metal reactor gasification produces a crude gas (gasification gas containing organic components) which is sprayed into the bottom layer of the secondary molten metal reactor iron liquid through the gas-liquid passage. 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 reactor to completely gasify into inorganic mixed gas, ensuring that no high molecules escape.

[0114] In summary, this invention employs a vertical material tank design with multiple sets of material-pushing blade units arranged longitudinally along the rotation axis. Based on the angle of the blades in these units and in conjunction with the rotation of the shaft, the material-pushing blades simultaneously push some material towards the center of the tank, loosening it upwards, and push some material towards the outer wall of the tank, promoting flow between the inside and outside of the material, enhancing heat exchange, and ensuring uniform heating. The continuous upward movement of the material effectively prevents bridging and blockage by elastic materials. By adding a stirring system to the vertical material tank, the problem of bridging and blockage by elastic materials is avoided, and the problem of uneven preheating in vertical material tanks is solved. The heat exchange jacket design on the outside of the tank body ensures that the material is uniformly preheated before entering the subsequent reaction system, preventing material agglomeration or localized overheating due to temperature differences, thus improving material quality and reaction stability. This integrated material preheating and conveying process avoids heat loss and achieves better thermal balance and utilization.

[0115] The feeding and preheating material system of this utility model will be described below with reference to specific embodiments.

[0116] Example 1

[0117] This embodiment provides a preheating material and feeding system. For example... Figures 1 to 19 As shown.

[0118] It is used as a feedstock for decomposition and gasification reaction systems of recyclable and renewable resources such as municipal solid waste, industrial waste, and biomass.

[0119] The feeding and preheating system includes parallel-connected discharge tanks A16 and B17, a feeding tank 19, a first screw conveyor 18, and a second screw conveyor 20. The discharge ports of discharge tanks A16 and B17 are respectively connected to the inlet of the first screw conveyor 18 through pipes. The outlet of the first screw conveyor 18 is connected to the inlet of the feeding tank 19 through a pipe. The discharge port of the feeding tank 19 is connected to the inlet of the second screw conveyor 20 through a pipe. The outlet of the second screw conveyor 20 is connected to external equipment through a sealed interface.

[0120] The feeding tank 19 includes a tank body 21, a heat exchange jacket 23 disposed outside the tank body 21, a rotating shaft 29 disposed along the height direction of the tank body 21 and passing through the tank body, and a feeding plate disposed axially along the rotating shaft 29; the projections of the outer feeding plate and the inner feeding plate on the radial plane of the rotating shaft do not overlap.

[0121] The outer side pushing piece and the inner side pushing piece are fixedly arranged on the rotating shaft. The inner side pushing piece comprises an inner side pushing piece unit 30, which comprises three first paddles 38 arranged uniformly in the circumferential direction around 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 inclined upward along the axis of the rotating shaft 29 by 10°-60° with respect to the radial plane of the rotating shaft 29.

[0122] The outer side pushing piece comprises a plurality of outer side pushing piece units, each of which comprises two second paddles 35 fixedly connected to the rotating shaft 29 by a first transmission shaft 36.

[0123] The outer side pushing piece comprises an outer side upper pushing piece 31 arranged in the upper region of the rotating shaft. The second paddle 35 of the outer side pushing piece unit of the outer side upper pushing piece 31 is a rectangular paddle. The plane of the second paddle 35 forms an angle b1 of 10°-60° with the axis of the rotating shaft 29, and the horizontal axis of the plane of the second paddle 35 forms an angle c1 of 15°-75° with the extension of the axis of the first transmission shaft 36.

[0124] Exemplarily, the outer side pushing piece comprises an outer side lower pushing piece 32 arranged 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 plane of the second paddle 35 forms an angle b2 of 10°-60° with the axis of the rotating shaft 29, and the horizontal axis of the plane of the second paddle 35 forms an angle c2 of 15°-75° with the extension of the axis of the first transmission shaft 36. Moreover, c2>c1.

[0125] The feeding tank 19 further comprises a conical discharge opening 27, the upper end of which is connected below the tank body 21 by a discharge opening flange 22, and the lower end of which is connected to external conveying equipment by a necked flange 28. The rotating shaft 29 passes through the discharge opening flange 22 and the conical discharge opening 27, and is fixedly installed inside the necked flange 28 of the conical discharge opening 27 by a lower end bearing 33 and a lower bearing seat.

[0126] The outer side pushing piece further comprises a discharge opening pushing piece arranged in the region of the conical discharge opening 27 of the rotating shaft. The second paddle 35 of the outer side pushing piece unit of the discharge opening pushing piece is an inverted trapezoidal paddle. The plane of the second paddle 35 forms an angle b3 of 10°-60° with the axis of the rotating shaft 29. The inverted trapezoidal paddle comprises two sides, a long bottom side parallel to the first transmission shaft and a short bottom side, one of the two sides being connected to the first transmission shaft, and the long bottom side being located above the short bottom side.

[0127] The blanking flange 22 is provided with a material shoveling paddle above it, which comprises two third paddles 37 fixedly connected to the rotating shaft 29 through second transmission shafts 39 respectively.

[0128] The material pouring cans A 16 and B 17 are identical in structure to the material loading can 19, wherein the material pouring cans A 16 and B 17 are standby for each other.

[0129] The heat exchange jacket 23 comprises 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 material can body 21, and its two ends are connected to 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; fins 26 are installed outside the heating coil.

[0130] When the material feeding and preheating system is used:

[0131] The material is conveyed from the external material bin to the material pouring can A 16 (the material pouring can B 17 is standby), and the feeding is completed through the feeding port of the material pouring can A 16; meanwhile, the rotating shaft of the material pouring can A 16 continuously rotates in the material loading can, the material falls into the first screw conveyor 18 through the conical blanking port of the material pouring can A 16, and then enters the feeding port of the material loading can 19 from the outlet of the first screw conveyor 18; the rotating shaft of the material loading can 19 also continuously rotates, the material enters the second screw conveyor 20 through the conical blanking port of the material loading can 19, and is finally conveyed to the decomposition gasification reaction system; the outlet of the second screw conveyor 20 is connected to 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.

[0132] When the material enters the material pouring can A 16, the external air enters the heat exchange jacket 23 of the system through the medium inlet 24 of the material loading can heat exchange jacket 23, and after completing heat exchange, returns to the air compressor through the medium outlet of the material pouring can A 16, so that the heat exchange air is recycled. Before entering the system, the air exchanges heat with the 1500 DEG C 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 DEG C. Before the material enters the decomposition gasification reaction system, through the above heat exchange process, the material is preheated to 400 DEG C.

[0133] Application of the material feeding and preheating system:

[0134] The system is used for feeding and conveying of recyclable and renewable resources such as household garbage, industrial garbage and biomass, with a conveying capacity of 200 m 3 / h.

[0135] The main equipment parameters of the system are as follows: the diameter of the tank body 21 is 4 meters, the lower diameter of the conical material falling 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 stirring piece unit is 8; the plane of the first paddle 38 forms a 60° angle with the axis of the rotating shaft 29, and is upwardly inclined by 30° along the axis of the rotating shaft 29 with respect to the radial plane of the rotating shaft 29; b1=b2=b3=30°; b4=60°; c1=45°; c2=60°.

[0136] The main operating parameters of the system are as follows: the rotating shafts of the inverted tank and the feeding tank rotate at a speed of 65r / min.

[0137] The main preheating parameters are as follows: 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.

[0138] During the operation of the entire system, the material conveying is smooth, and there is no blocking or bridging phenomenon, and the material temperature distribution is uniform.

[0139] Example 2

[0140] The embodiment provides a molten metal reaction kettle and a gasification system based on the molten metal reaction kettle, as shown in Figures 20 to 23 .

[0141] The molten metal reaction kettle, as shown in Figure 20 , Figure 21 , Figure 22 , comprises a primary molten metal reaction kettle 1 and a secondary molten metal reaction kettle 2 which are connected to each other through a gas-liquid passage 3; the primary molten metal reaction kettle 1 is internally provided with a first metal pool 101, and the secondary molten reaction kettle 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 reaction kettle 1 and the secondary molten metal reaction kettle 2 are horizontally staggered;

[0142] The gas-liquid channel 3 is a semi-conical channel, and the axial section of the semi-conical channel is higher than the curved surface of the semi-conical channel. The semi-conical channel includes a channel inlet, a channel body, and a channel outlet. The channel inlet is connected to the primary molten metal reactor 1, and the channel outlet is connected to the secondary molten metal reactor 2. Both the channel inlet and the channel outlet are semi-circular, with the inlet diameter being larger than the outlet diameter, and their centerlines are collinear and aligned. There is a distance between the centerline of the channel inlet and the bottom of the primary molten metal reactor 1, and the bottom arc of the channel outlet is in contact with the bottom of the secondary molten metal reactor 2.

[0143] The top of the primary molten metal reactor 1 is provided with a feed inlet 102, a first gasifying agent spray gun mounting port 601, and a second gasifying agent spray gun mounting port 602; the top of the secondary molten metal reactor 2 is provided with a syngas outlet 9; the upper part of the outer wall of the secondary molten metal reactor 2 is also provided with a third gasifying agent spray gun mounting port 7 and a biomass spray gun mounting port 8; a slag-liquid pool 202 is provided above the second metal pool 201 of the secondary molten metal reactor 2.

[0144] Gasification system: such as Figure 23 As shown, it includes a feeding and preheating system, a gasifying agent supply system, a molten metal reaction system, a syngas purification and heat exchange system, and a syngas storage system connected in sequence via pipelines; the feeding and preheating system is connected to the inlet of the molten metal reaction system through a sealed interface; the gasifying agent supply system includes a superheated steam boiler and / or an oxygen tank, the outlets of which are respectively connected to the gasifying agent spray guns that are introduced into the molten metal reaction system.

[0145] The syngas purification and heat exchange system includes a cyclone dust collector, a heat exchanger, a bag filter dust collector, a scrubbing tower, and an air compressor. The inlet of the cyclone dust collector is connected to the syngas outlet of the secondary molten metal reactor, and its outlet is connected to the hot fluid inlet of the heat exchanger. The hot fluid outlet of the heat exchanger is connected in sequence to the bag filter dust collector and the scrubbing tower. The outlet of the scrubbing tower is connected to the syngas storage system. Air is supplied to the cold fluid inlet of the heat exchanger through the air compressor. After heat exchange in the heat exchanger, the air is sent to the heat exchange jacket of the feeding tank through a pipeline.

[0146] The syngas storage system includes a compressor and a syngas storage tank connected to the compressor outlet via a pipeline. The compressor inlet is connected to the scrubbing tower outlet via a pipeline.

[0147] When the gasification system is in use: through the feeding and preheating system, the material falls into the first metal pool 101 of the first molten metal reactor 1 on the surface of the molten metal, and at the same time, the oxygen is sprayed onto the liquid surface at the falling position of the material 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 subjected to the first 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 first molten metal reactor 1 makes the pressure in the first molten metal reactor 1 higher than the pressure in the second molten metal reactor 2, so that the first mixed gas enters the second metal pool 201 at the bottom of the second molten metal reactor 2 through the gas-liquid passage 3 and passes through the molten metal and slag liquid layer, the oxygen is sprayed into the second metal pool 201 through the third gasification agent spray gun 12 and / or the biomass powder is sprayed into the second metal pool 201 through the biomass spray gun 13, and the product inorganic mixed gas is discharged from the synthetic gas outlet 9 to the cyclone dust collector for dust removal and then enters the synthetic gas purifying agent heat exchange system, after heat exchange, further dust removal and purification are carried out, and finally enters the synthetic gas storage tank.

[0148] The waste heat recovery process of the system is as follows: the high-temperature product synthetic gas enters the heat exchanger through the pipeline, the air compressor sends the air into the heat exchanger, after heat exchange, the temperature of the synthetic gas at the hot end outlet is reduced, and the temperature of the air at the cold end outlet is increased.

[0149] 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 second molten metal reactor 2 and is closed after being discharged to a specified height.

[0150] Application of the gasification system of the embodiment:

[0151] Material: household garbage, industrial garbage and biomass, treatment capacity is 100 tons / hour; gasification agent is oxygen, and the molten metal is iron liquid with a temperature of 1400-1700℃.

[0152] 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 metal reactor 2 is 2 meters, and the height of the slag layer is 3 meters; the inlet of the gas-liquid passage 3 is a semicircle with a diameter of 2 meters, the outlet of the passage is a semicircle with a diameter of 0.8 meters; the cross-sectional area of the synthetic gas outlet 9 is 0.8m 2 The inlet of the passage is a semicircle with a diameter of 1.8-2 meters, and the distance from the upper end surface of the passage inlet to the bottom of the first metal pool is 2 meters; the outlet of the passage is a semicircle with a diameter of 0.6-0.8 meters.

[0153] When the system is used for the first time, the particle <2mm iron powder is added into the first metal pool 101 and the second metal pool 201 respectively, and after being heated to a molten state, the dolomite powder and the limestone powder are added into the second metal pool 201 to form a slag liquid layer.

[0154] Main design parameters of the decomposition gasification reaction and the subsequent treatment process: the material is dropped into the first metal pool 101 of the first-stage molten metal reaction kettle 1 through the feeding and preheating system and falls on the surface of the molten metal, and at the same time, the 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-stage molten metal reaction kettle 1, and the material is subjected to the first-stage gasification reaction under the catalysis of the iron liquid, and the first mixed gas is obtained after the reaction, and the pressure in the first-stage molten metal reaction kettle 1 reaches 1.5 MPa. The first mixed gas enters the bottom of the second metal pool 201 of the second-stage molten reaction kettle 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 oxygen is sprayed into the second metal pool 201 by the third gasification agent spray gun 12 at a speed of 200 m / s, the biomass powder is sprayed into the second metal pool 201 by the biomass spray gun 13 at a speed of 200 m / s, the product inorganic mixed gas is discharged from the synthesis gas outlet 9 at a speed of 30-35 m / s and enters the synthesis gas purifying agent heat exchange system after being dedusted by the cyclone dust collector, the temperature is reduced to below 300 DEG C after completing the heat exchange, further dedusting and purifying are carried out, and then the product inorganic mixed gas enters the synthesis gas storage tank.

[0155] Main design parameters of the waste heat recovery process: the product inorganic mixed gas with a temperature of 1500 DEG C enters the heat exchanger through the pipeline, and the air is sent into the heat exchanger through the air compressor, after heat exchange, the temperature of the inorganic mixed gas at the hot end outlet is 300 DEG C, and the temperature of the air at the cold end outlet is 850 DEG C; the air is sent into the heat exchange jacket 23 outside the wall of the feeding tank 19 and the material pouring tank, and the material is preheated to 400 DEG C.

[0156] In summary, the vertical material tank is designed, a plurality of material pushing piece units are longitudinally arranged along the rotating shaft, the angle of the paddle of the material pushing piece unit is set, and the rotation of the rotating shaft is combined, so that when the material pushing piece is pushed, on one hand, part of the material is pushed to the center of the material tank and is loosened upward, and on the other hand, part of the material is pushed to the outer wall of the material tank, the flow between the inside and the outside of the material is promoted, heat exchange is promoted, the material is uniformly heated, meanwhile, the material is continuously turned upward, and the bridging and blocking of the elastic material can be effectively avoided; the stirring system is arranged in the vertical material tank, on one hand, the problem of bridging and blocking of the elastic material is avoided, and on the other hand, the problem of uneven preheating of the vertical material tank is solved; the heat exchange jacket outside the material tank body is designed, so that the material can be uniformly preheated before entering the subsequent reaction system, the material caking or local overheating caused by temperature difference is avoided, the material quality and the reaction stability are improved, the material preheating and conveying integration is realized, heat loss is avoided, better heat balance and heat utilization are realized.

[0157] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A feeding tank, characterized in that, The device includes a tank body, and a vertical stirring system is provided at the axial center of the tank body. The vertical stirring system includes a rotating shaft and a stirring blade arranged axially along the rotating shaft.

2. The feeding tank according to claim 1, characterized in that, The material-pulling plate includes an inner material-pulling plate and an outer material-pulling plate. The inner material-pulling plate includes multiple inner material-pulling plate units, each inner material-pulling plate unit including three first blades evenly connected to the outer periphery of the rotating shaft. The outer material-pulling plate includes multiple outer material-pulling plate units, each outer material-pulling plate unit including a first drive shaft connected to the rotating shaft and a second blade installed at the free end of the drive shaft.

3. The feeding tank according to claim 2, characterized in that, The first blade has an eccentric fan ring shape, which is part of an eccentric ring formed by two eccentric circles with different diameters. It includes an inner arc, an outer arc, and a long side and a short side connecting the inner and outer arcs. The inner arc of the eccentric fan ring coincides with the outer circumference of the rotation shaft. The diameter of the outer arc of the eccentric fan ring is 1.5 to 2.5 times the diameter of the inner arc. The central angle of the eccentric fan ring with the inner arc as its center is 90° to 120°, excluding 120°.

4. The feeding tank according to claim 2, characterized in that, The outer and inner material-pulling plates are arranged alternately along the rotation axis.

5. The feeding tank according to claim 4, characterized in that, The outer paddles, which are at different axial positions on the rotating shaft, have different angles between their planes and the extended line of the first drive shaft axis.

6. The feeding tank according to claim 5, characterized in that, The second blade plane of the upper outer part of the upper part of the rotating shaft is at an angle of 15° to 75° with the extension line of the first drive shaft axis.

7. The feeding tank according to claim 5, characterized in that, The second blade plane of the lower outer part of the material feed plate located in the lower region of the rotating shaft forms an angle of 15° to 75° with the extension line of the first drive shaft axis.

8. The feeding tank according to claim 6 or 7, characterized in that, The blade plane of the second blade forms an angle of 10° to 60° with the axis of rotation.

9. The feeding tank according to claim 3, characterized in that, The plane of the first blade forms an angle of 30° to 85° with the axis of the rotating shaft, and at the same time, it is tilted upwards by 10° to 60° relative to the radial plane of the rotating shaft along the axis of the rotating shaft.

10. A material feeding and preheating system, characterized in that, Includes the feeding tank as described in any one of claims 1 to 9.

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