Powder dissolving kettle with disperser and application thereof

Abstract

The invention provides a powder dissolving kettle with a disperser and application of the powder dissolving kettle. The powder dissolving kettle comprises a dissolving kettle body, a powder inlet pipe connected with the dissolving kettle body and a powder flow guide shell arranged in the dissolving kettle body. The powder guide shell is a cone with an opening in the bottom surface; and the powder inlet pipe is arranged above the powder flow guide shell. Powder is conveyed into the dissolving kettle body, the powder is fully mixed with saturated steam in the dissolving kettle body under the action of the saturated steam jet piece at the top, and meanwhile, the powder guide shell guides the powder through the conical peripheral surface, so that the powder moves downwards along the conical peripheral surface, on one hand, the mixing uniformity is improved, and the mixing efficiency is improved. Secondly, the dissolving efficiency of the powder is improved; and thirdly, the solubility of the powder is improved. In addition, the dissolving process does not involve the addition of a liquid solvent, so that the post-treatment process is simplified, the energy consumption of the post-treatment process is reduced, and the problem of large discharge amount of waste liquid in the post-treatment process is solved.

Description

Technical Field

[0001] This invention belongs to the field of mixing equipment technology, specifically relating to a powder dissolving kettle with a disperser and its application. Background Technology

[0002] Powder dissolving kettles are devices specifically designed to improve the dissolution efficiency of powdered substances. However, in industrial applications, situations often arise where powdered raw materials have low solubility, making them difficult to completely dissolve under normal conditions. To address this problem, methods commonly employed by those skilled in the art include heating and stirring (e.g.,...). Figure 1 (As shown), pressure control, the use of surfactants, and increasing solvent usage are all methods. These methods, used alone, often fail to achieve the desired results, therefore a combination of at least two methods is frequently necessary, such as heating, stirring, and increasing solvent usage. Increasing solvent usage often complicates post-treatment processes, increasing both wastewater discharge and post-treatment costs.

[0003] Therefore, developing a powder dissolving vessel suitable for materials with low solubility to overcome the problems of complex post-processing procedures and increased waste discharge caused by increased solvent usage has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a powder dissolving kettle with a dispersant and its application.

[0005] One of the objectives of this invention is to provide a powder dissolving vessel with a disperser, comprising a dissolving vessel body, a powder inlet pipe connected to the dissolving vessel body, and a powder guide shell disposed within the dissolving vessel body; the powder guide shell is a cone with an open bottom surface; the powder inlet pipe is disposed above the powder guide shell.

[0006] In a preferred embodiment of the present invention

[0007] The powder inlet pipe includes a straight section and a flared section of the powder inlet pipe connected sequentially from top to bottom; and / or,

[0008] The powder inlet pipe is coaxially arranged with the body of the dissolving vessel; and / or

[0009] The powder inlet pipe is connected to the top surface of the dissolving vessel body; and / or,

[0010] The powder guide shell is connected to the inner wall of the dissolving vessel body; and / or,

[0011] The powder guide shell is coaxially arranged with the dissolving vessel body; and / or

[0012] The top surface of the powder guide shell is arc-shaped;

[0013] Preferred,

[0014] The height of the powder guide shell is 65-85% of the height of the dissolving vessel body, preferably 75-80%; and / or,

[0015] The diameter of the bottom surface of the powder guide shell is 50-70% of the inner diameter of the dissolving vessel body, preferably 55-65%; and / or,

[0016] The diameter of the bottom surface of the powder inlet pipe is 20-40% of the inner diameter of the dissolving vessel body, preferably 25-35%; and / or,

[0017] The flared section of the powder inlet pipe is located inside the top of the dissolving vessel body;

[0018] More preferably,

[0019] The complementary angle of the half-apex angle of the top surface of the powder guide shell is greater than the angle of repose of the powder; and / or,

[0020] The diameter of the top surface of the powder guide shell is 50-80% of the inner diameter of the bottom surface of the powder inlet pipe, preferably 60-70%.

[0021] The best option,

[0022] The half-apex angle of the top surface of the powder guide shell is smaller than the angle of repose of the powder; and / or,

[0023] The powder inlet pipe is connected to the powder inlet pipeline.

[0024] In a preferred embodiment of the present invention

[0025] The powder guide shell is connected to the dissolving vessel body through a rib plate assembly and a support beam assembly, with the rib plate assembly located above the support beam assembly;

[0026] Preferred,

[0027] The rib assembly includes multiple ribs at the same vertical height, one end of each rib being connected to the outer wall of the powder guide shell and the other end being connected to the inner wall of the dissolving vessel body; and / or,

[0028] The support beam assembly includes multiple support beams at the same vertical height. After passing through the powder guide shell, both ends of the support beams are connected to the inner wall of the dissolving vessel body.

[0029] More preferably,

[0030] The spacing between two adjacent stiffeners is the same; and / or,

[0031] The length of the support beam is the same as the inner diameter of the dissolving vessel body; and / or,

[0032] The included angle between any two adjacent support beams is the same;

[0033] The best option,

[0034] The top surface of the stiffening plate is a conical apex; and / or,

[0035] The top surface of the support beam is a cone.

[0036] In a preferred embodiment of the present invention

[0037] The dissolving vessel body is provided with a top saturated steam injection device, which includes a top saturated steam inlet connected to a saturated steam inlet pipeline and a top saturated steam nozzle assembly connected to the saturated steam inlet; the top saturated steam nozzle assembly is connected to the inner wall of the trumpet section of the powder inlet pipe.

[0038] Preferred,

[0039] The top saturated steam nozzle group includes multiple top saturated steam nozzles, each of which is connected to the saturated steam inlet;

[0040] More preferably,

[0041] Multiple top saturated steam nozzles are arranged in a ring on the inner sidewall of the flared section of the powder inlet pipe; and / or,

[0042] A top saturated steam nozzle group, consisting of multiple top saturated steam nozzles, is coaxially arranged with the dissolving vessel body; and / or,

[0043] The spacing between two adjacent top saturated steam nozzles is the same;

[0044] The best option,

[0045] Each of the top saturated steam nozzles in the top saturated steam nozzle group is tilted downwards and toward the axis of the dissolving vessel body.

[0046] In a preferred embodiment of the present invention

[0047] The dissolving vessel body is provided with a powder distribution mesh, which is located below the powder inlet pipe and above the powder guide shell. The powder distribution mesh is connected to the inner wall of the dissolving vessel body.

[0048] Preferably, the powder dispensing mesh is connected to the inner wall of the dissolving vessel body;

[0049] More preferably, the mesh size of the powder distribution screen is not less than 5 mesh, and more preferably 10 to 25 mesh.

[0050] In a preferred embodiment of the present invention

[0051] The dissolving vessel body is provided with multiple central saturated steam injection elements, all of which are located below the powder inlet pipe, and all of the multiple central saturated steam injection elements are connected to the inner wall of the dissolving vessel body.

[0052] Preferred,

[0053] Multiple central saturated steam injection components are connected to the inner wall of the dissolving vessel body;

[0054] More preferably,

[0055] Multiple central saturated steam jets are arranged parallel to each other and sequentially from top to bottom; and / or,

[0056] The spacing between two adjacent central saturated steam injectors is the same.

[0057] In a preferred embodiment of the present invention

[0058] Each of the central saturated steam injectors includes a central saturated steam injector body, a central saturated steam inlet connected to the outer side of the central saturated steam injector body, and a central saturated steam nozzle assembly connected to the inner side of the central saturated steam injector body.

[0059] Preferred,

[0060] The central saturated steam injection component body is all in the form of an annular tube; and / or,

[0061] The central saturated steam jet body is coaxially arranged with the melting vessel body.

[0062] In a preferred embodiment of the present invention

[0063] Each central saturated steam nozzle group includes multiple pairs of central saturated steam nozzles. Each pair of central saturated steam nozzles includes an upper central saturated steam nozzle and a lower central saturated steam nozzle. The upper central saturated steam nozzle is inclined upward, and the lower central saturated steam nozzle is inclined downward.

[0064] Preferably, the angle between the upper central saturated steam nozzle and the horizontal plane is 20° to 70°, more preferably 30° to 60°, and even more preferably 45°; and / or,

[0065] The angle between the lower central saturated steam nozzle and the horizontal plane is 20° to 70°, preferably 30° to 60°, and more preferably 45°.

[0066] More preferably,

[0067] The spacing between two adjacent pairs of central saturated steam nozzles is the same;

[0068] The best option,

[0069] Each of the aforementioned central saturated steam nozzle groups comprises at least four pairs of central saturated steam nozzles.

[0070] In a preferred embodiment of the present invention

[0071] The inner wall of the dissolving vessel body is polished or coated with PTFE; and / or,

[0072] The outer wall of the top saturated steam jet component is polished or has a PTFE coating; and / or...

[0073] The outer wall of the central saturated steam jet component is polished or has a PTFE coating; and / or...

[0074] The outer wall of the powder guide shell is polished or has a PTFE coating.

[0075] Preferably, the melting vessel body is provided with a heat tracing jacket, which is connected to the heat tracing medium inlet pipeline and the heat tracing medium outlet pipeline respectively;

[0076] More preferably, the dissolving vessel body comprises, from top to bottom, a connected upper end cap, a cylindrical body, and a lower cone, with a mixed powder outlet at the bottom of the lower cone; the cylindrical body and the cone in the dissolving vessel body are provided with heat tracing jackets.

[0077] Preferably, the heat tracing jacket is provided with a heat medium guide plate.

[0078] A second objective of this invention is to provide an application of the powder dissolving vessel with a dispersant, as described in one objective of this invention, in powder dissolving, comprising the following steps:

[0079] S1: Powder material is introduced into the powder inlet pipe and enters the dissolving kettle body; at the same time, a heating medium is introduced into the heating jacket of the powder dissolving kettle.

[0080] S2: Saturated steam is introduced into the top saturated steam injector, and the mixture is evenly dispersed in the melting vessel body and moves downward;

[0081] S3: Saturated steam is introduced into multiple central saturated steam injection components. The powder material and saturated steam move downward along the powder guide shell and mix thoroughly, and then exit from the bottom outlet of the dissolving kettle body.

[0082] Preferred,

[0083] The particle size of the powder material is 5–200 micrometers, preferably 10–100 micrometers; and / or,

[0084] The density of the powder material is 200–800 kg / m³. 3 The preferred value is 250–500 kg / m³. 3 ; and / or,

[0085] The temperature of the heating medium is 100–200°C, preferably 150–190°C; and / or,

[0086] The inlet temperature of the saturated steam is 100–200°C, preferably 140–150°C; and / or,

[0087] The inlet pressure of the saturated steam is 0.1–1.5 MPaG, preferably 0.3–0.6 MPaG.

[0088] Compared with the prior art, the beneficial effects of the present invention are:

[0089] 1. The powder dissolving kettle with a disperser of the present invention uses a pneumatic powder conveying system to transport powder into the dissolving kettle body. Under the action of the top saturated steam injection element, the powder is fully mixed with the saturated steam in the dissolving kettle body. Simultaneously, the powder guide shell guides the powder with its conical outer circumference, causing the powder to move downward along the conical outer circumference. This increases the mixing uniformity, improves the powder dissolution efficiency, and enhances the powder solubility. Furthermore, since the dissolution process does not involve the addition of liquid solvents, it simplifies the post-processing steps, reduces the energy consumption of the post-processing steps, and solves the problem of large wastewater discharge in the post-processing process.

[0090] 2. The powder dissolving kettle with a disperser of the present invention eliminates the need for traditional stirring equipment, solves the problem of difficult selection of stirring equipment, reduces equipment investment, reduces the frequency of inspection and maintenance of moving parts, improves the stability of powder dissolving kettle operation, and saves operating costs.

[0091] 3. The powder dissolving kettle with a disperser of the present invention has a simple structure, requires less equipment investment, and is easy to maintain. Attached Figure Description

[0092] Figure 1 This is a schematic diagram of the structure of a powder dissolving vessel with a stirrer in the prior art;

[0093] Figure 2 This is a schematic diagram of the powder dissolving kettle with a disperser according to the present invention;

[0094] Figure 3 for Figure 2A magnified view of a portion of the image;

[0095] Figure 4 for Figure 2 A cross-sectional view along the AA direction;

[0096] Figure 5 for Figure 2 Cross-sectional view along the BB direction;

[0097] Figure 6 for Figure 5 A cross-sectional view along the CC direction;

[0098] Figure 7 This is a schematic diagram of the structure of one pair of central saturated steam nozzles of the present invention;

[0099] In the figure, 1-Dissolving vessel body; 2-Powder inlet pipe; 21-Powder inlet pipe flare section; 3-Powder guide shell; 41-Firming rib; 42-Support beam; 5-Top saturated steam jet; 6-Powder distribution mesh; 71-First middle saturated steam jet; 72-Second middle saturated steam jet; 73-Third middle saturated steam jet; 74-Upper middle saturated steam nozzle; 75-Lower middle saturated steam nozzle; 8-Heating jacket; 81-Heating medium inlet pipeline; 82-Heating medium outlet pipeline. Detailed Implementation

[0100] The present invention will now be described in further detail with reference to the accompanying drawings:

[0101] Example 1

[0102] like Figures 2-6As shown, this invention provides a powder dissolving vessel with a disperser, comprising a dissolving vessel body 1, a powder inlet pipe 2 connected to the top surface of the dissolving vessel body 1, and a powder guide shell 3 disposed within the dissolving vessel body 1; the powder inlet pipe 2 is located above the powder guide shell 3. The dissolving vessel body 1 includes, from top to bottom, an upper end cap, a cylindrical body, and a cone. Specifically, in this embodiment, the powder inlet pipe 2 is connected to the top surface of the upper end cap in the dissolving vessel body 1, and the powder guide shell 3 is connected to the inner wall of the cylindrical body in the dissolving vessel body 1. The powder inlet pipe 2 is connected to a powder inlet pipeline, and further connected to a pneumatic powder conveying system. Preferably, the powder inlet pipe 2 includes a straight section and a flared section 21 connected vertically, so that the powder material in the powder inlet pipeline is diffused through the flared section 21 and uniformly dispersed in the cross-section of the dissolving vessel body 1. The flared section 21 is disposed within the top of the dissolving vessel body 1. The powder guide shell 3 is a hollow cone with an open bottom surface, guiding the powder through its outer circumference so that the powder moves downwards along the outer circumference. More preferably, the height of the powder guide shell 3 is 65-85% of the height of the dissolving vessel body 1, preferably 75-80%; and / or, the diameter of the bottom surface of the powder guide shell 3 is 50-70% of the inner diameter of the dissolving vessel body 1, preferably 55-65%; and / or, the diameter of the bottom surface of the powder inlet pipe 2 is 20-40% of the inner diameter of the dissolving vessel body 1, preferably 25-35%.

[0103] In a preferred embodiment of the present invention, the top surface of the powder guide shell 3 is arc-shaped, eliminating dead corners and preventing powder material from accumulating on the top surface of the powder guide shell 3. Preferably, the complementary angle of the half-apex angle of the top surface of the powder guide shell 3 is greater than the angle of repose of the powder, and more preferably, the half-apex angle of the top surface of the powder guide shell 3 is smaller than the angle of repose of the powder, to further ensure that the powder does not remain on the powder guide shell 3. More preferably, the diameter of the top surface of the powder guide shell 3 is 50-80% of the inner diameter of the bottom surface of the horn section 21 of the powder inlet pipe, preferably 60-70%; here, "diameter of the top surface of the powder guide shell 3" refers to the diameter at the connection between the arc-shaped top surface of the powder guide shell 3 and the cone-shaped body of the powder guide shell 3. More preferably, the powder inlet pipe 2 is coaxially arranged with the dissolving vessel body 1; and / or, the powder inlet pipe 2 is connected to the top surface of the dissolving vessel body 1; and / or, the powder guide shell 3 is connected to the inner side wall of the dissolving vessel body 1; and / or, the powder guide shell 3 is coaxially arranged with the dissolving vessel body 1.

[0104] In a preferred embodiment of the present invention, the powder guide shell 3 is connected to the dissolving vessel body 1 via a rib assembly and a support beam assembly. The rib assembly is positioned above the support beam assembly to ensure the stability of the powder guide shell 3 during operation. Figure 4 As shown, the rib assembly includes multiple ribs 41 at the same vertical height. One end of each rib 41 is connected to the outer wall of the powder guide shell 3, and the other end is connected to the inner wall of the dissolving vessel body 1. Preferably, the spacing between adjacent ribs 41 is the same. More preferably, the top surface of each rib 41 is a cone apex, and the included angle of the cone apex is the same as the apex angle of the powder guide shell 3, further preventing powder material from accumulating above the rib 41. Figure 5 As shown, the support beam assembly includes multiple support beams 42 at the same vertical height. Each support beam 42 passes through the powder guide shell 3 and is connected at both ends to the inner wall of the dissolving vessel body 1. The intersections of the multiple support beams 42 are fixedly connected, specifically by welding. Preferably, the length of the support beam is the same as the inner diameter of the dissolving vessel body; and / or, the included angle between two adjacent support beams 42 is the same. More preferably, the top surface of the support beam 42 is a conical apex (e.g., ...). Figure 6 As shown in the diagram, the included angle of the cone apex is the same as the apex angle of the powder guide shell 3, further preventing powder material from accumulating above the support beam 42. It should be noted that... Figure 3 The central stiffener assembly includes four equally spaced stiffeners 41 at the same vertical height. Figure 4 The middle support beam assembly includes two mutually perpendicular support beams 42 at the same vertical height, but this does not constitute a limitation on the stiffening plate assembly and the support beam assembly.

[0105] In a preferred embodiment of the present invention, a top saturated steam jetting element 5 is provided inside the dissolving vessel body 1 to purge the powder material fed by pneumatic conveying. Specifically, in this embodiment, the top surface of the upper end cap of the dissolving vessel body 1 is provided with the top saturated steam jetting element 5. The top saturated steam jetting element 5 includes a top saturated steam inlet and a top saturated steam nozzle assembly; preferably, the top saturated steam nozzle assembly includes multiple top saturated steam nozzles. The top saturated steam inlet is located outside the dissolving vessel body 1 and is connected to a saturated steam inlet pipeline. The top saturated steam nozzle assembly is connected to the inner wall of the flared section 21 of the powder inlet pipe, and the inlet end of each top saturated steam nozzle is connected to the saturated steam inlet pipe. More preferably, each top saturated steam nozzle in the top saturated steam nozzle assembly is inclined downward and faces the axis of the dissolving vessel body 1. Most preferably, the plurality of top saturated steam nozzles are arranged in a ring on the inner sidewall of the flared section of the powder inlet pipe; and / or, the spacing between two adjacent top saturated steam nozzles is the same; and / or, the top saturated steam nozzle group composed of the plurality of top saturated steam nozzles is coaxially arranged with the dissolving vessel body 1.

[0106] like Figure 3 As shown, in this embodiment, the top saturated steam nozzle assembly in the top saturated steam injection component 5 is provided with a total of four top saturated steam nozzles. Figure 3 (Only two are shown in the image). The top saturated steam nozzle group, consisting of four top saturated steam nozzles, is circular and coaxially arranged with the dissolving vessel body 1; the spacing between two adjacent top saturated steam nozzles is the same; Figure 3 The two top saturated steam nozzles shown are both tilted downwards and toward the axis of the dissolving vessel body 1. However, this is merely an illustrative example of the present invention, and the number and angle of the top saturated steam nozzles do not constitute a limitation of the present invention.

[0107] In a preferred embodiment of the present invention, a powder distribution mesh 6 is provided inside the dissolving vessel body 1, and the powder distribution mesh 6 is located below the powder inlet pipe 2 and above the powder guide shell 3 (e.g., Figure 3As shown, the powder distribution mesh 6 is connected to the dissolving vessel body 1, preferably to the inner wall of the dissolving vessel body 1. Specifically, the outer circumferential surface of the powder distribution mesh 6 is connected to the inner wall of the dissolving vessel body 1 to facilitate uniform powder distribution. In this embodiment, the powder material in the powder inlet pipe is uniformly distributed onto the powder distribution mesh 6 via the bell-shaped section 21 of the powder inlet pipe, and then enters the cylindrical section of the dissolving vessel body 1. Preferably, the mesh count of the powder distribution mesh 6 is not less than 5 mesh, more preferably 10-25 mesh, to avoid powder material clogging the mesh openings of the powder distribution mesh 6. If the mesh count of the powder distribution mesh 6 is too high, the mesh openings will be too small, easily causing powder material clogging; if the mesh count of the powder distribution mesh 6 is too low, the distribution purpose cannot be achieved. It should be noted that, firstly, those skilled in the art can determine the mesh size of the powder distribution mesh 6 based on the particle size of the powder; secondly, those skilled in the art can set the number and angle of the top saturated steam nozzles according to the specifications of the dissolving vessel body 1, so that the spray area of ​​the top saturated steam nozzle group can cover the entire plane of the powder distribution mesh 6, thereby improving the powder agitation ability and preventing powder residue on the powder distribution mesh 6.

[0108] In a preferred embodiment of the present invention, the dissolving vessel body 1 is provided with a plurality of central saturated steam injectors, which are located below the powder distribution mesh 6. All of the plurality of central saturated steam injectors are connected to the inner sidewall of the dissolving vessel body 1. Specifically, in this embodiment, the cylinder of the dissolving vessel body 1 is provided with a plurality of central saturated steam injectors, all of which are connected to the inner sidewall of the cylinder of the dissolving vessel body 1. Preferably, the plurality of central saturated steam injectors are parallel to each other and arranged sequentially from top to bottom. Specifically, in this embodiment, the axes of the plurality of central saturated steam injectors are all perpendicular to the horizontal plane. More preferably, the spacing between two adjacent central saturated steam injectors is the same.

[0109] like Figure 2 As shown, the dissolving vessel body 1 is equipped with three central saturated steam injection elements. The outer circumferential surfaces of the three central saturated steam injection elements are all connected to the inner sidewall of the dissolving vessel body 1. The axes of the three central saturated steam injection elements are all perpendicular to the horizontal plane, and the three central saturated steam injection elements are arranged at equal intervals. However, this is only an illustrative example and does not constitute a limitation of the present invention. Those skilled in the art can determine the number of central saturated steam injection elements based on the height of the dissolving vessel body 1, especially the length of the cylinder in the dissolving vessel body 1. For ease of description, [the following is a simplified description]. Figure 2 The three central saturated steam injectors are named the first central saturated steam injector 71, the second central saturated steam injector 72, and the third central saturated steam injector 73, respectively.

[0110] In a preferred embodiment of the present invention, each of the central saturated steam injectors includes a central saturated steam injector body, a central saturated steam inlet connected to the outer side of the central saturated steam injector body, and a central saturated steam nozzle assembly connected to the inner side of the central saturated steam injector body. Preferably, the central saturated steam injector body is an annular tube; and / or, the central saturated steam injector body is coaxially arranged with the dissolving vessel body 1; and / or, the spacing between two adjacent central saturated steam nozzle assemblies is the same.

[0111] Specifically, in this embodiment, the first central saturated steam injector 71, the second central saturated steam injector 72, and the third central saturated steam injector 73 each include a central saturated steam injector body, a central saturated steam inlet, and a central saturated steam nozzle assembly. The central saturated steam nozzle assembly in the first central saturated steam injector 71 is annular and coaxially arranged with the dissolving vessel body 1; the central saturated steam nozzle assembly in the second central saturated steam injector 72 is annular and coaxially arranged with the dissolving vessel body 1; and the central saturated steam nozzle assembly in the third central saturated steam injector 73 is annular and coaxially arranged with the dissolving vessel body 1. The distance between the first central saturated steam injector 71 and the second central saturated steam injector 72 is the same, and the distance between the second central saturated steam injector 72 and the third central saturated steam injector 73 is the same.

[0112] In a preferred embodiment of the present invention, each central saturated steam nozzle group includes multiple pairs of central saturated steam nozzles, so that its spray range can completely cover the cross-section of the dissolving vessel body 1, thereby improving the dissolution efficiency of the powder in saturated steam. Figure 7 As shown, each pair of central saturated steam nozzles includes an upper central saturated steam nozzle 74 and a lower central saturated steam nozzle 75. The upper central saturated steam nozzle 74 is inclined upwards, and the lower central saturated steam nozzle 75 is inclined downwards to further ensure that the steam fills the entire dissolving vessel body 1 after being injected by the central saturated steam nozzles, increasing the contact area between the powder and the saturated steam. Preferably, the angle between the upper central saturated steam nozzle 74 and the horizontal plane is 20° to 70°, preferably 30° to 60°, and more preferably 45°; the angle between the lower central saturated steam nozzle 75 and the horizontal plane is 20° to 70°, preferably 30° to 60°, and more preferably 45°. It should be noted that the outer circumference of the central saturated steam nozzle group is as close as possible to the inner wall of the dissolving vessel body 1 to prevent the powder between the central saturated steam nozzle group and the inner wall of the dissolving vessel body 1 from being outside the spray range of the central saturated steam nozzle group, thereby reducing the dead zone of contact between the powder and the saturated steam. More preferably, the spacing between two adjacent pairs of central saturated steam nozzles is the same. Most preferably, each group of central saturated steam nozzles includes at least four pairs of central saturated steam nozzles.

[0113] In a preferred embodiment of the present invention, the inner wall of the dissolving vessel body 1 is polished or coated with a PTFE coating to minimize the adhesion of powder material to the inner wall of the dissolving vessel body 1. Preferably, the outer walls of the top saturated steam jet, the middle saturated steam jet, and the powder guide shell 3 are polished or coated with a PTFE coating to minimize the adhesion of powder material to the outer walls of the top saturated steam jet, the middle saturated steam jet, and the powder guide shell 3.

[0114] In a preferred embodiment of the present invention, a heat tracing jacket 8 is provided outside the dissolving vessel body 1, and the heat tracing jacket 8 is connected to the heat tracing medium inlet pipeline 81 and the heat tracing medium outlet pipeline 82, respectively. Preferably, the heat tracing jacket 8 is provided outside the cylinder and cone of the dissolving vessel body 1 to achieve a sufficient heat tracing effect and improve the dissolution efficiency of the powder. More preferably, a heat tracing medium guide plate is provided inside the heat tracing jacket 8 to improve the heat tracing effect and further improve the dissolution efficiency of the powder material.

[0115] The present invention also provides an application of a powder dissolving kettle with a dispersant, specifically including the following steps:

[0116] S1: Powder material is introduced into the powder inlet pipe 2. The powder material passes sequentially through the straight section and the flared section 21 of the powder inlet pipe 2 and reaches the powder distribution mesh 6 on the dissolving vessel body 1. Preferably, the particle size of the powder material is 5-200 micrometers, more preferably 10-100 micrometers; and / or, the density of the powder material is 200-800 kg / m³. 3 More preferably 250–500 kg / m 3 Simultaneously, a heating medium is introduced into the heating jacket 8 of the melting vessel body 1. The temperature of the heating medium is preferably 100-200°C, and more preferably 150-190°C.

[0117] S2: Saturated steam is introduced into the top saturated steam injection element 5. Under the action of the top saturated steam, the mixture is uniformly dispersed on the powder distribution mesh 6 of the dissolving vessel body 1 and moves downward through the powder distribution mesh 6. Preferably, the inlet temperature of the saturated steam is 100-200°C, more preferably 140-150°C; and / or, the inlet pressure of the saturated steam is 0.1-1.5 MPaG, more preferably 0.3-0.6 MPaG.

[0118] S3: Saturated steam is introduced into multiple central saturated steam injectors. Under the action of multiple pairs of upper central saturated steam nozzles 74 and lower central saturated steam nozzles 75, the powder material and saturated steam move downwards along the powder guide shell 3 and mix thoroughly, finally exiting from the bottom outlet of the dissolving vessel body 1. Preferably, the inlet temperature and inlet pressure of the saturated steam are the same as in step S2.

[0119] Example 1

[0120] This embodiment provides a powder solvent with a disperser, including a dissolving vessel body 1, a powder inlet pipe 2 connected to the top surface of the dissolving vessel body 1, and a powder guide shell 3 connected to the inner wall of the dissolving vessel body 1. The dissolving vessel body 1, from top to bottom, includes an upper end cap, a cylinder, and a cone connected in sequence, with a mixed powder outlet at the bottom of the lower cone. Specifically, the powder inlet pipe 2 is connected to the top surface of the upper end cap in the dissolving vessel body 1. The powder inlet pipe 2 is connected to a powder inlet pipeline, and then to a pneumatic powder conveying system. The powder inlet pipe 2 includes a straight section and a flared section 21. The diameter of the bottom surface of the powder inlet pipe 2 is 30% of the inner diameter of the dissolving vessel body 1. The powder guide shell 3 is a cone with an opening facing downwards. A powder distribution mesh 6 is provided between the powder inlet pipe 2 and the powder guide shell 3, and the outer circumferential surface of the powder distribution mesh 6 is connected to the inner wall of the dissolving vessel body 1. The mesh size of the powder distribution mesh 6 is 10 mesh. The powder guide shell 3 is connected to the inner wall of the dissolving vessel body 1.

[0121] The top surface of the dissolving vessel body 1 is provided with a top saturated steam injection element 5. Specifically, the top surface of the upper end cap of the dissolving vessel body 1 is provided with a top saturated steam injection element 5. The top saturated steam injection element 5 includes a saturated steam inlet and a top saturated steam nozzle assembly. The top saturated steam inlet is located outside the dissolving vessel body 1 and is connected to a saturated steam inlet pipeline. The top saturated steam nozzle assembly is located inside the dissolving vessel body 1. The inlet end of the top saturated steam nozzle assembly is connected to the saturated steam inlet. The top saturated steam nozzle assembly is annular. The four top saturated steam nozzles in the top saturated steam nozzle assembly are all inclined downwards and facing the axis of the dissolving vessel body 1, and the four top saturated steam nozzles are equally spaced.

[0122] The top surface of the powder guide shell 3 is arc-shaped, with a semi-apex angle of 20°. The diameter of the top surface of the powder guide shell 3 is 65% of the inner diameter of the bottom surface of the powder inlet pipe 2. The height of the powder guide shell 3 accounts for 75% of the total height of the dissolving vessel body 1. The inner diameter of the bottom surface of the powder guide shell 3 accounts for 60% of the inner diameter of the dissolving vessel body 1. The powder guide shell 3 is connected to the inner wall of the dissolving vessel body 1 via upper and lower rib assemblies and support beam assemblies to ensure the stability of the powder guide shell 3 during operation. The rib assemblies are generally annular and include four ribs 41 at the same vertical height; the four ribs 41 are equally spaced. The top surface of each rib 41 is a cone with a semi-apex angle of 20°. The support beam assemblies are generally cross-shaped and include two support beams 42 at the same vertical height and perpendicular to each other. The length of each support beam 42 is the same as the inner diameter of the dissolving vessel body 1. The top surface of the support beam 42 is a cone, and the half-apex angle of the cone is 20°.

[0123] The dissolving vessel body 1 is equipped with three central saturated steam injectors, located below the top saturated steam injector 5. All three central saturated steam injectors are connected to the inner wall of the dissolving vessel body 1. The three central saturated steam injectors are parallel to each other and arranged sequentially from top to bottom, with their axes perpendicular to the horizontal plane. The distance between any two adjacent central saturated steam injectors is 600 mm. Each of the three central saturated steam injectors includes a central saturated steam injector body, a central saturated steam inlet connected to the outer surface of the central saturated steam injector body, and a central saturated steam nozzle assembly connected to the inner surface of the central saturated steam injector body. Each central saturated steam jet assembly includes 12 pairs of central saturated steam nozzles; each pair of central saturated steam nozzles includes an upper central saturated steam nozzle 74 and a lower central saturated steam nozzle 75, the upper central saturated steam nozzle 74 being inclined upward at 45°, and the lower central saturated steam nozzle 75 being inclined downward at 45°; the distance between the outer peripheral surface of the central saturated steam nozzle assembly and the melting vessel body 1 is 100mm.

[0124] The inner wall of the dissolving vessel body 1, the outer wall of the top saturated steam jet, the outer wall of the middle saturated steam jet, and the outer wall of the powder guide shell 3 are polished. A heat tracing jacket 8 is provided outside the dissolving vessel body 1, which is connected to the heat tracing medium inlet pipeline 81 and the heat tracing medium outlet pipeline 82, respectively. A heat tracing medium guide plate is provided inside the heat tracing jacket 8.

[0125] The powder dissolving kettle with a distributor in this embodiment is used for powder dissolving, where the powder is nylon powder with a repose angle of 25°. The application of the powder dissolving kettle with a distributor to powder dissolving specifically includes the following steps:

[0126] S1: Powder material is introduced into powder inlet pipe 2. The powder material passes sequentially through the straight section and the flared section 21 of powder inlet pipe 2 and reaches the powder distribution mesh 6 on the dissolving vessel body 1. The particle size of the powder material is 50μm, and the bulk density of the powder material is 300kg / m³. 3 Simultaneously, a heating medium is introduced into the heating jacket 8 of the melting vessel body 1, and the temperature of the heating medium is 190℃.

[0127] S2: Saturated steam is introduced into the top saturated steam injection unit 5, wherein the inlet temperature of the saturated steam is 190℃ and the inlet pressure of the saturated steam is 1.15 MPa. Under the action of the top saturated steam, the mixture is uniformly dispersed on the powder distribution mesh 6 of the dissolving vessel body 1 and moves downward through the powder distribution mesh 6.

[0128] S3: Saturated steam is introduced into multiple central saturated steam injectors. The inlet temperature and pressure of the saturated steam are the same as in step S2. Under the action of multiple pairs of upper central saturated steam nozzles 74 and lower central saturated steam nozzles 75, the powder material is in a molten state under the action of saturated steam and mixes with the condensate from the saturated steam. The powder material moves downward along the outer peripheral surface of the powder guide shell 3 and is fully mixed. Finally, it is discharged from the bottom outlet of the dissolving vessel body 1.

[0129] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0130] In the description of this invention, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0131] The above technical solution is only one embodiment of the present invention. For those skilled in the art, based on the principles disclosed in the present invention, it is easy to make various types of improvements or modifications, and not limited to the technical solutions described in the specific embodiments of the present invention. Therefore, the foregoing description is only a preferred option and is not restrictive.

Claims

1. A powder dissolving vessel with a disperser, characterized in that, It includes a dissolving vessel body, a powder inlet pipe connected to the dissolving vessel body, and a powder guide shell disposed inside the dissolving vessel body; the powder guide shell is a cone with an open bottom surface; the powder inlet pipe is located above the powder guide shell.

2. The powder dissolving kettle with a disperser according to claim 1, characterized in that, The powder inlet pipe includes a straight section and a flared section of the powder inlet pipe connected sequentially from top to bottom; and / or, The powder inlet pipe is coaxially arranged with the body of the dissolving vessel; and / or The powder inlet pipe is connected to the top surface of the dissolving vessel body; and / or, The powder guide shell is connected to the inner wall of the dissolving vessel body; and / or, The powder guide shell is coaxially arranged with the dissolving vessel body; and / or The top surface of the powder guide shell is arc-shaped; Preferred, The height of the powder guide shell is 65-85% of the height of the dissolving vessel body, preferably 75-80%; and / or, The diameter of the bottom surface of the powder guide shell is 50-70% of the inner diameter of the dissolving vessel body, preferably 55-65%; and / or, The diameter of the bottom surface of the powder inlet pipe is 20-40% of the inner diameter of the dissolving vessel body, preferably 25-35%; and / or, The flared section of the powder inlet pipe is located inside the top of the dissolving vessel body; More preferably, The complementary angle of the half-apex angle of the top surface of the powder guide shell is greater than the angle of repose of the powder; and / or, The diameter of the top surface of the powder guide shell is 50-80% of the inner diameter of the bottom surface of the powder inlet pipe, preferably 60-70%. The best option, The half-apex angle of the top surface of the powder guide shell is smaller than the angle of repose of the powder; and / or, The powder inlet pipe is connected to the powder inlet pipeline.

3. The powder dissolving kettle with a disperser according to claim 1, characterized in that, The powder guide shell is connected to the dissolving vessel body through a rib plate assembly and a support beam assembly, with the rib plate assembly located above the support beam assembly; Preferred, The rib assembly includes multiple ribs at the same vertical height, one end of each rib being connected to the outer wall of the powder guide shell and the other end being connected to the inner wall of the dissolving vessel body; and / or, The support beam assembly includes multiple support beams at the same vertical height. After passing through the powder guide shell, both ends of the support beams are connected to the inner wall of the dissolving vessel body. More preferably, The spacing between two adjacent stiffeners is the same; and / or, The length of the support beam is the same as the inner diameter of the dissolving vessel body; and / or, The included angle between any two adjacent support beams is the same; The best option, The top surface of the stiffening plate is a conical apex; and / or, The top surface of the support beam is a cone.

4. The powder dissolving kettle with a disperser according to claim 1, characterized in that, The dissolving vessel body is provided with a top saturated steam injection device, which includes a top saturated steam inlet connected to a saturated steam inlet pipeline and a top saturated steam nozzle assembly connected to the saturated steam inlet; the top saturated steam nozzle assembly is connected to the inner wall of the trumpet section of the powder inlet pipe. Preferred, The top saturated steam nozzle group includes multiple top saturated steam nozzles, each of which is connected to the saturated steam inlet; More preferably, Multiple top saturated steam nozzles are arranged in a ring on the inner sidewall of the flared section of the powder inlet pipe; and / or, A top saturated steam nozzle group, consisting of multiple top saturated steam nozzles, is coaxially arranged with the dissolving vessel body; and / or, The spacing between two adjacent top saturated steam nozzles is the same; The best option, Each of the top saturated steam nozzles in the top saturated steam nozzle group is tilted downwards and toward the axis of the dissolving vessel body.

5. The powder dissolving kettle with a disperser according to claim 1, characterized in that, The dissolving vessel body is provided with a powder distribution mesh, which is located below the powder inlet pipe and above the powder guide shell. The powder distribution mesh is connected to the inner wall of the dissolving vessel body. Preferably, the powder dispensing mesh is connected to the inner wall of the dissolving vessel body; More preferably, the mesh size of the powder distribution screen is not less than 5 mesh, and more preferably 10 to 25 mesh.

6. The powder dissolving kettle with a disperser according to claim 4, characterized in that, The dissolving vessel body is provided with multiple central saturated steam injection elements, all of which are located below the powder inlet pipe, and all of the multiple central saturated steam injection elements are connected to the inner wall of the dissolving vessel body. Preferred, Multiple central saturated steam injection components are connected to the inner wall of the dissolving vessel body; More preferably, Multiple central saturated steam jets are arranged parallel to each other and sequentially from top to bottom; and / or, The spacing between two adjacent central saturated steam injectors is the same.

7. The powder dissolving kettle with a disperser according to claim 6, characterized in that, Each of the central saturated steam injectors includes a central saturated steam injector body, a central saturated steam inlet connected to the outer side of the central saturated steam injector body, and a central saturated steam nozzle assembly connected to the inner side of the central saturated steam injector body. Preferred, The central saturated steam injection component body is all in the form of an annular tube; and / or, The central saturated steam jet body is coaxially arranged with the melting vessel body.

8. The powder dissolving kettle with a disperser according to claim 7, characterized in that, Each central saturated steam nozzle group includes multiple pairs of central saturated steam nozzles. Each pair of central saturated steam nozzles includes an upper central saturated steam nozzle and a lower central saturated steam nozzle. The upper central saturated steam nozzle is inclined upward, and the lower central saturated steam nozzle is inclined downward. Preferably, the angle between the upper central saturated steam nozzle and the horizontal plane is 20° to 70°, more preferably 30° to 60°, and even more preferably 45°; and / or, The angle between the lower central saturated steam nozzle and the horizontal plane is 20° to 70°, preferably 30° to 60°, and more preferably 45°. More preferably, The spacing between two adjacent pairs of central saturated steam nozzles is the same; The best option, Each of the aforementioned central saturated steam nozzle groups comprises at least four pairs of central saturated steam nozzles.

9. The powder dissolving kettle with a disperser according to claim 6, characterized in that, The inner wall of the dissolving vessel body is polished or coated with PTFE; and / or, The outer wall of the top saturated steam jet component is polished or has a PTFE coating; and / or... The outer wall of the central saturated steam jet component is polished or has a PTFE coating; and / or... The outer wall of the powder guide shell is polished or has a PTFE coating. Preferably, the melting vessel body is provided with a heat tracing jacket, which is connected to the heat tracing medium inlet pipeline and the heat tracing medium outlet pipeline respectively; More preferably, the dissolving vessel body comprises, from top to bottom, a connected upper end cap, a cylindrical body, and a lower cone, with a mixed powder outlet at the bottom of the lower cone; the cylindrical body and the cone in the dissolving vessel body are provided with heat tracing jackets. Preferably, the heat tracing jacket is provided with a heat medium guide plate.

10. The application of the powder dissolving vessel with a dispersant as described in any one of claims 1 to 9 in powder dissolving, characterized in that, Includes the following steps: S1: Powder material is introduced into the powder inlet pipe and enters the dissolving kettle body; at the same time, a heating medium is introduced into the heating jacket of the powder dissolving kettle. S2: Saturated steam is introduced into the top saturated steam injector, and the mixture is evenly dispersed in the melting vessel body and moves downward; S3: Saturated steam is introduced into multiple central saturated steam injection components. The powder material and saturated steam move downward along the powder guide shell and mix thoroughly, and then exit from the bottom outlet of the dissolving kettle body. Preferred, The particle size of the powder material is 5–200 micrometers, preferably 10–100 micrometers; and / or, The density of the powder material is 200–800 kg / m³. 3 The preferred value is 250–500 kg / m³. 3 ; and / or, The temperature of the heating medium is 100–200°C, preferably 150–190°C; and / or, The inlet temperature of the saturated steam is 100–200°C, preferably 140–150°C; and / or, The inlet pressure of the saturated steam is 0.1–1.5 MPaG, preferably 0.3–0.6 MPaG.

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