Homogenizing reaction and separation integrated industrial byproduct gypsum hydrothermal upgrading device

Abstract

The invention discloses a homogeneous reaction and separation integrated hydrothermal upgrading device for industrial byproduct gypsum, and belongs to the technical field of slurry reaction devices under high temperature and high pressure. The device is characterized in that an elliptical head is arranged on one side of a reaction device barrel, a slurry inlet pipeline and a steam pipeline are arranged on the elliptical head, stirring blades and turbulent flow blades are arranged on the inner wall of the elliptical head, and an inner screw rib type stirring and conveying assembly is fixed in the reaction device barrel; the solid-liquid separation unit is arranged on the other side of the reaction device barrel, and a slurry baffle plate is arranged at the upper end of the joint of the reaction device barrel and the solid-liquid separation unit; one end of the steam heating device is connected with the elliptical head, and the other end is arranged along the axial direction of the reaction device barrel; and the water separation discharging device is arranged on the solid-liquid separation unit. The device provided by the invention not only can ensure that the slurry is rapidly heated and pressurized, but also can keep good homogeneity of the slurry, and can produce partially dehydrated gypsum slurry, so that the economical efficiency of the whole process and the system integration are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of slurry reaction devices under high temperature and high pressure, and more specifically to a homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device. Background Art

[0002] Sulfur dioxide (SO2) is extremely harmful to the environment and humans. A large amount of SO2 is released during the combustion of solid fuels such as coal. Therefore, wet desulfurization technology is used to remove SO2 from flue gas in the tail gas treatment system of coal-fired boilers. However, wet desulfurization technology produces industrial by-product gypsum mainly composed of calcium sulfate dihydrate (CaSO4·2H2O). As a solid waste, its post-treatment and resource utilization are extremely important. In particular, since chloride ions (Cl - ), which will also be fixed to the industrial by-product gypsum during the wet flue gas desulfurization process. Therefore, the harmless treatment and green and efficient resource utilization of industrial by-product gypsum are extremely important.

[0003] At present, the most common way to recycle industrial by-product gypsum is to process it into β-hemihydrate gypsum (β-CaSO4·0.5H2O) for use as building gypsum, but its added value is low and is limited by the development of the construction industry. Compared with β-hemihydrate gypsum, α-hemihydrate gypsum (α-CaSO4·0.5H2O, also known as high-strength gypsum) has good working performance, mechanical properties, thermal stability, biocompatibility, environmental protection performance and chemical corrosion resistance. It can be used in precision casting, high-end building materials, arts and crafts, medical treatment, aviation, shipbuilding and other fields. It can also be used in high-end fireproof building materials and is an important raw material in high-end manufacturing. Therefore, further converting industrial by-product gypsum into α-hemihydrate gypsum with higher economic value is of great significance for the resource utilization of industrial by-product gypsum and increasing economic added value.

[0004] For the harmless treatment and resource utilization of industrial by-product gypsum, a solid waste, the hydrothermal treatment method can effectively remove the chloride ions therein and convert the industrial by-product gypsum into α-hemihydrate gypsum. In the hydrothermal treatment process of industrial by-product gypsum, the homogeneity of the industrial by-product gypsum slurry is a necessary condition to ensure the complete hydrothermal reaction. A good reaction device can quickly increase the temperature and pressure of the prepared gypsum slurry before the end of the reaction incubation period, and quickly raise the reaction environment to the high temperature and high pressure environment required for the hydrothermal reaction, thereby avoiding the volume expansion of the slurry caused by the hydrothermal reaction, thereby reducing the degree of homogeneity. Since the industrial by-product gypsum slurry and the finished gypsum slurry after the reaction are very easy to harden after deposition, during a long reaction time, the reaction device needs to maintain the homogeneity of the slurry by stirring, on the one hand to prevent the hardening of the gypsum slurry, and on the other hand to ensure that the high temperature and high pressure water is in full contact with the gypsum particles. In addition, after the gypsum slurry is completely reacted, the hemihydrate gypsum will undergo a reverse reaction at room temperature to generate dihydrate gypsum slurry, which reduces the yield of the finished gypsum and seriously affects its economic value. Therefore, a high-temperature dehydration device is required, and the final product target is a moisture content of 0. This preliminary wet separation before cooling can remove part of the moisture without consuming additional energy, reducing the energy consumption of the dehydration process. However, setting up a separate wet separation device poses great challenges to the transportation and insulation of the slurry, and will cause certain limitations to the device layout of the process system. Summary of the invention

[0005] In view of the above problems, the present invention provides a homogenization reaction separation integrated industrial by-product gypsum hydrothermal upgrading device, which can not only ensure that the industrial by-product gypsum slurry is quickly heated and pressurized to the temperature and pressure required for the hydrothermal reaction to achieve rapid homogenization, but also enable the slurry to achieve good homogeneity during the reaction and prevent hardening; at the same time, the device can achieve solid-liquid self-separation after the reaction, reduce energy consumption, and produce partially dehydrated gypsum slurry. It can improve the economy and system integration of the overall process, and further enhance the scalability of the process.

[0006] The object of the present invention is to provide a homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device, comprising: a reaction device cylinder, one side of which is provided with an elliptical head, a slurry inlet pipeline is provided on the elliptical head, the inner wall of the elliptical head is provided with stirring blades and spoiler blades, and an internal spiral rib stirring and conveying assembly is fixed in the reaction device cylinder.

[0007] The solid-liquid separation unit is arranged on the other side of the reaction device cylinder, and a slurry baffle is arranged on the upper end of the connection between the reaction device cylinder and the solid-liquid separation unit.

[0008] A steam heating device, one end of which is connected to the elliptical end cap, and the other end of which is arranged along the axial direction of the cylinder of the reaction device and is used for injecting steam into the cylinder of the reaction device.

[0009] A water separation discharging device is arranged on the solid-liquid separation unit.

[0010] In a preferred embodiment of the present invention, the steam heating device includes a steam pipeline and a three-stage steam nozzle, the three-stage steam nozzle is arranged circumferentially on the steam pipeline, the steam pipeline sprays steam into the cylinder of the reaction device through the three-stage steam nozzle, the number of the three-stage steam nozzles in the elliptical head is 1 / 8 to 1 / 5 of the total number of all the three-stage steam nozzles, the three-stage steam nozzles in the elliptical head cooperate with the spoiler blades to achieve slurry heating, homogenization and reaction incubation, so that the slurry stays in the elliptical head for 2 minutes to 10 minutes.

[0011] In a preferred embodiment of the present invention, the three-stage steam nozzle is provided with three nozzles, and the arrangement angle of the nozzles is -45° to 45° away from the vertical direction of the steam pipeline.

[0012] In a preferred embodiment of the present invention, the three-stage steam nozzle includes a Laval nozzle section, a curved pipe section, an outlet protective cover and a steam outlet; the Laval nozzle section is connected to the curved pipe section via a first flange; the curved pipe section is connected to the outlet protective cover and the steam outlet via a second flange.

[0013] In a preferred embodiment of the present invention, the spoiler blades are arranged between the stirring blades and the cylinder of the reaction device, the number of the spoiler blades is 3-8, and the Reynolds number of the slurry at the spoiler blades is 8 times the Reynolds number in the cylinder of the reaction device, thereby achieving slurry homogenization in the elliptical head.

[0014] The spoiler blade is an arc plate, the outer arc surface of the arc plate is connected to the inner wall of the elliptical head, a plurality of the arc plates are distributed circumferentially around the axis of the elliptical head, and the arc plates are arranged axially inclined, and slurry channels are formed between the arc plates.

[0015] In a preferred embodiment of the present invention, the water separation and discharging device comprises a liquid phase outlet branch pipe, a liquid phase outlet main pipe and a filter screen.

[0016] The two ends of the liquid phase outlet branch pipe are respectively connected to the reaction device cylinder and the liquid phase outlet main pipe, and a filter screen is arranged between the liquid phase outlet branch pipe and the solid-liquid separation unit.

[0017] In a preferred embodiment of the present invention, the inner spiral rib stirring and conveying component is a turning plate stirring blade or an inner spiral belt stirring blade.

[0018] In a preferred embodiment of the present invention, the angle of the flipping plate of the flipping plate type stirring blade is 1~15°; the spiral height of the inner spiral belt type stirring blade is 1 / 10~1 / 3 of the inner diameter of the reaction device cylinder, and the conveying rate of the reaction device cylinder is 1 / 4-1 / 3 of the feeding rate of the reaction device, wherein the conveying rate is equal to the product of the rotation speed and the pitch.

[0019] In a preferred embodiment of the present invention, a safety valve is provided at the top of the solid-liquid separation unit, and a slurry outlet is provided at the bottom.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses the dense arrangement of the stirring blades on the inner wall of the elliptical head and the steam heating device in the elliptical head section to quickly mix the slurry and steam entering the hydrothermal upgrading device, thereby achieving rapid temperature and pressure increase and reducing the temperature and pressure fluctuations inside the hydrothermal upgrading device. The coupling of the stirring blades on the inner wall of the elliptical head and the spoiler blades further enhances the mixing of the slurry and improves the homogeneity of the slurry. The rotation of the reaction device cylinder drives the inner spiral belt on the inner wall to stir the slurry, providing forward momentum for the slurry and promoting the mixing of the slurry to prevent the solid phase of the slurry from sinking to the bottom and causing compaction. At the same time, when the slurry with good homogeneity undergoes a hydrothermal reaction, the water and solid phase are in more complete contact, which further improves the reaction performance and promotes the efficient conversion of industrial by-product gypsum into α-hemihydrate gypsum. In addition, a water separation and discharging device is provided on the rear side of the cylinder of the reaction device. After the slurry reaction is completed, the slurry is wet-separated by the water separation and discharging device in the solid-liquid separation unit. During the separation process, the slurry baffle is provided to prevent the rotating fluid in the cylinder of the reaction device from interfering with the stationary part of the fluid in the solid-liquid separation unit, thereby improving the wet separation efficiency.

[0021] (2) The present invention sprays high-pressure steam through the steam outlet arranged axially on the cylinder of the reaction device, and arranges the outlet to gradually enlarge the interval according to the hydrothermal reaction characteristics of industrial by-product gypsum, thereby improving the uniformity of the temperature field inside the reaction device and avoiding problems such as low conversion efficiency and side reactions caused by excessively high or low local temperatures. At the same time, the three-stage steam nozzle avoids clogging of the steam nozzle by gypsum slurry through the Laval nozzle section and the outlet protective cover, reducing the probability of equipment failure.

[0022] (3) The present invention uses a stationary solid-liquid separation unit at the end of the reaction device to perform preliminary wet separation of the slurry. The stationary separation water is discharged through the water outlet branch at the top of the solid-liquid separation unit, and a replaceable filter is provided to avoid the problem of slurry solid phase particles contained in the stationary separation water, thereby improving the reuse rate of the separation water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device provided by the present invention.

[0024] Figure 2 This is a schematic structural diagram of the three-stage steam nozzle provided by the present invention.

[0025] Figure 3 A schematic diagram of the structure of the spoiler blades provided by the present invention arranged on an elliptical head.

[0026] Figure 4 This is a schematic structural diagram of the spoiler blade provided by the present invention along the AA section.

[0027] Figure 5 A schematic diagram of the three-stage steam nozzles provided by the present invention arranged circumferentially along the steam pipeline.

[0028] Figure markings: 1-spoiler blade; 2-slurry inlet pipeline; 3-steam pipeline; 4-pipeline rotating dynamic seal; 5-elliptical head; 6-stirring blade; 7-reactor cylinder flange; 8-reactor cylinder; 9-internal spiral rib stirring and conveying assembly; 10-reactor cylinder dynamic seal; 11-safety valve; 12-filter; 13-reducing flange; 14-exhaust valve; 15-liquid phase outlet main pipe; 16-liquid phase outlet branch pipe; 17-solid-liquid separation unit; 18-slurry baffle; 19-three-stage steam nozzle; 20-slurry outlet flange; 21-Laval nozzle section; 22-first flange; 23-bend section; 24-second flange; 25-outlet protective cover; 26-steam outlet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] In order to solve the problems of rapid temperature and pressure increase, slurry homogeneity, and reaction-wet separation device integration faced by gypsum slurry during the reaction and separation process, the present invention provides a homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device, which achieves rapid temperature and pressure increase after the slurry enters the device, and always maintains good homogeneity of the gypsum slurry during the reaction. At the same time, wet separation is carried out at the end of the reaction device, thereby improving the integration of the hydrothermal reaction system.

[0034] like Figure 1~Figure 5 The present invention provides a homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device, comprising: a reaction device cylinder 8, a steam heating device, a solid-liquid separation unit and a water separation discharging device.

[0035] An elliptical head 5 is fixedly connected to one side of the reaction device cylinder 8. Specifically, the elliptical head 1 is fixed to the reaction device cylinder 8 through the reaction device cylinder flange 7. The elliptical head 5 is connected to the slurry inlet pipeline 2 through the pipeline rotary dynamic seal 3. The front end of the inner wall of the elliptical head 5 is fixedly connected to a stirring blade 6. The stirring blades 6 are densely arranged at the elliptical head 5. The setting of the stirring blade 6 achieves rapid stirring by controlling the channel change in the stirring blade 6, so that the slurry is quickly mixed with steam after entering the reaction device cylinder 8, achieving rapid temperature and pressure increase, and reducing the temperature and pressure fluctuations inside the reaction device cylinder 8. The front end of the inner wall of the elliptical head 5 is fixedly connected to a spoiler blade 1. The spoiler blade 1 behind the stirring blade 5 on the inner wall of the elliptical head 5 further strengthens the slurry mixing and improves the slurry homogeneity.

[0036] The spoiler blade 1 used in the present invention is an arc-shaped plate, the outer arc surface of the arc-shaped plate is fixedly connected to the inner wall of the elliptical head 5, and a plurality of the arc-shaped plates are distributed on the inner circumference of the elliptical head 5 with the axis of the elliptical head 5, and the arc-shaped plates are arranged obliquely along the axial direction, such as Figure 3 As shown, the radial axis of the elliptical head 5 is taken as the reference, the inclination angle of the spoiler pressing plate is 20°~60°, and a tapered slurry channel is formed between the plurality of arc plates, and the cross section is as shown in Figure 4 By changing the width of the tapered slurry channel in the arc-shaped plate, the solid phase and the liquid phase in the slurry are squeezed to further increase the mixing thereof.

[0037] The number and length of the spoiler blades have a constrained relationship with the internal spiral rib transport assembly in the cylinder of the reaction device, that is, the number of the spoiler blades 1 is 3-8, and the Reynolds number of the slurry at the spoiler blades 1 is 8 times the Reynolds number in the cylinder 8 of the reaction device, thereby achieving rapid homogenization of the slurry in the elliptical head 5.

[0038] An inner spiral rib stirring and conveying assembly 9 is fixed in the cylinder 8 of the reaction device. Specifically, the inner spiral rib stirring and conveying assembly 9 includes but is not limited to a turning plate stirring blade and an inner spiral belt stirring blade; the turning plate angle of the turning plate stirring blade is 1~15°; the spiral height of the inner spiral belt stirring blade is H, the pitch is S, and the spiral angle is α; the value range of the H value is 1 / 10~1 / 3 of the inner diameter D of the cylinder of the reaction device; the constraint relationship between the pitch and the spiral angle is α=arctan(S / πD). During the rotation of the cylinder 8 of the reaction device, the inner spiral rib stirring and conveying assembly 9 on the inner wall is driven to stir the slurry, provide forward power for the slurry, and promote the mixing of the slurry, preventing the solid phase part of the slurry from sinking to the bottom and causing the phenomenon of hardening. At the same time, when the slurry with good homogeneity undergoes a hydrothermal reaction, the water and the solid phase are in more sufficient contact, which further improves the reaction performance and promotes the efficient conversion of industrial by-product gypsum into α-hemihydrate gypsum.

[0039] The steam heating device is arranged inside the cylinder 8 of the reaction device, one end of the steam heating device is connected to the elliptical head 5, and the other end is arranged along the axial direction of the cylinder 8 of the reaction device. Steam is sprayed into the cylinder 8 of the reaction device through the steam heating device, which not only ensures the uniformity of heating, but also avoids the problem of overreaction or incomplete reaction caused by local excessively high or low temperature.

[0040] Furthermore, in the steam heating device, the steam pipeline 3 is connected to the elliptical head 5 through the pipeline rotary seal 3 and arranged along the axial direction of the reaction device cylinder 8. The steam pipeline 3 sprays steam into the reaction device cylinder through the three-stage steam nozzle 19 to perform mixed heating. Figure 5As shown, the three-stage steam nozzles 19 are densely arranged at the elliptical head 5, and are arranged circumferentially along the steam pipeline 3, deviating from the vertical direction of the steam pipeline 3 by -45°~45°, thereby improving the uniformity of steam injection. Among them, the number of the three-stage steam nozzles in the elliptical head 5 is 1 / 8~1 / 5 of the total number of the three-stage steam nozzles in the elliptical head 5 and the cylinder 8 of the reaction device; the three-stage steam nozzles in the elliptical head 5 cooperate with the spoiler blades 1 to achieve rapid heating and homogenization of the slurry and reaction incubation, so that the residence time of the slurry in the elliptical head 5 is 2min~10min. The three-stage steam nozzles 19 inside the cylinder 8 of the reaction device are arranged gradually loosely along the material forward direction, and the distance between each two three-stage steam nozzles 19 increases by 1%~15%. The present invention sprays high-pressure steam by arranging a steam outlet axially on the cylinder 8 of the reaction device, and the arrangement of the three-stage steam nozzles 19 is based on the hydrothermal reaction characteristics of industrial by-product gypsum, and the intervals between the three-stage steam nozzles 19 are gradually enlarged, thereby improving the uniformity of the temperature field inside the reaction device and avoiding problems such as low conversion efficiency and side reactions caused by local excessively high or low temperatures.

[0041] like Figure 2 As shown, the three-stage steam nozzle 19 used in the present invention includes a Laval nozzle section 21, a curved pipe section 23, an outlet protection cover 25 and a steam outlet 26; the Laval nozzle section 21 is connected to the curved pipe section 23 through a first flange 22; the curved pipe section 23 is connected to the outlet protection cover 25 and the steam outlet 26 through a second flange 24. The three-stage steam nozzle 19 is provided with the Laval nozzle section 21 and the outlet protection cover 25, thereby avoiding the clogging of the three-stage steam nozzle 19 by gypsum slurry and reducing the probability of equipment failure.

[0042] A solid-liquid separation unit is provided on the other side of the reaction device cylinder 8, and a slurry baffle 18 is provided at the upper end of the connection between the reaction device cylinder 8 and the solid-liquid separation unit. The slurry baffle 18 is used to prevent the rotating fluid in the reaction device cylinder 8 from interfering with the static fluid in the solid-liquid separation unit, thereby improving the static separation effect.

[0043] The water separation discharging device is arranged on the solid-liquid separation unit 17. The water separation discharging device comprises a thin and long liquid phase outlet branch pipe 16 fixed to the solid-liquid separation unit 17, which is connected to the liquid phase outlet main pipe 15 through a reducing flange 13. A detachable filter screen 12 is provided at the connection between the liquid phase outlet branch pipe 16 and the solid-liquid separation unit 17, and an exhaust valve 14 is included at the upper end. In addition, a safety valve 11 is connected to the top of the solid-liquid separation unit 17, and a slurry outlet is provided at the bottom, and a slurry outlet flange 20 is connected to the slurry outlet.

[0044] The solid-liquid separation unit is set to remove part of the water in advance to reduce the drying energy consumption, so that the slurry is initially wet-separated. The separated water passes through the slender liquid phase outlet branch pipe 16 at the top of the solid-liquid separation unit, and a replaceable filter screen 11 is set to avoid the problem of slurry solid phase particles contained in the separated water. The separated water can be recycled, such as for the preparation of gypsum slurry, thereby increasing the reuse of the separated water and reducing the water consumption of the system.

[0045] The pipeline rotating dynamic seal 4 and the reaction device cylinder dynamic seal 10 include but are not limited to mechanical dynamic seals, stuffing box dynamic seals, etc.

[0046] When the industrial by-product gypsum hydrothermal upgrading device of the present invention is used for reaction, the industrial by-product gypsum is added to the industrial by-product gypsum hydrothermal upgrading device through the slurry inlet pipeline 2, and steam is sprayed into the industrial by-product gypsum hydrothermal upgrading device through the steam pipeline 3. Under the action of the stirring blade 6 and the turbulent blade 1, the steam and the slurry are quickly mixed, so that the slurry quickly reaches the temperature and pressure of the hydrothermal reaction, and then the hydrothermal reaction is carried out in the industrial by-product gypsum hydrothermal upgrading device, and the rotation of the reaction cylinder 7 drives the inner spiral rib stirring and conveying assembly 9 to rotate, so as to promote the stirring and transportation of the slurry. At the same time, the steam pipeline 3 at the center of the axis of the reaction cylinder 7 continuously adds steam for heating to provide a heat source for the hydrothermal reaction. After the reaction is completed, the slurry obtained by the reaction is wet separated through the solid-liquid separation unit, and the separated water is discharged through the liquid phase outlet branch pipe 16 at the top, and the slurry with increased concentration after wet separation is discharged through the pipeline connected to the lower slurry outlet flange.

[0047] It should be noted that the component connection relationships not specifically mentioned in the present invention are assumed to adopt the existing technology. Since they do not involve the invention point and are widely used in the existing technology, the structural connection relationships are not described in detail.

[0048] It should be noted that when the present invention involves a numerical range, it should be understood that the two endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as those in the embodiments, in order to avoid redundancy, the present invention describes a preferred embodiment. Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A homogeneous reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device, characterized in that: include: A reaction device cylinder (8), wherein an elliptical seal head (5) is provided on one side of the reaction device cylinder (8), a slurry inlet pipeline (2) is provided on the elliptical seal head (5), a stirring blade (6) and a spoiler blade (1) are provided on the inner wall of the elliptical seal head (5), and an inner spiral rib type stirring and conveying assembly (9) is fixed inside the reaction device cylinder (8); A solid-liquid separation unit (17) is arranged on the other side of the reaction device cylinder (8), and a slurry baffle (18) is arranged at the upper end of the connection between the reaction device cylinder (8) and the solid-liquid separation unit (17); a steam heating device, one end of the steam heating device being connected to the elliptical end cap (5), and the other end of the steam heating device being arranged along the axial direction of the reaction device cylinder (8), and steam being sprayed into the reaction device cylinder (8) through the steam heating device; A water separation discharging device is arranged on the solid-liquid separation unit (17).

2. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 1 is characterized in that: The steam heating device comprises a steam pipeline (3) and a three-stage steam nozzle (19), wherein the three-stage steam nozzle (19) is arranged circumferentially on the steam pipeline (3), and the steam pipeline (3) sprays steam into the reaction device cylinder (8) through the three-stage steam nozzle (19). The number of the three-stage steam nozzles in the elliptical head (5) is 1 / 8 to 1 / 5 of the total number of the three-stage steam nozzles in the elliptical head (5) and the reaction device cylinder (8). The three-stage steam nozzle in the elliptical head (5) cooperates with the spoiler blade (1) to achieve slurry heating, homogenization and reaction incubation, so that the slurry stays in the elliptical head (5) for 2 minutes to 10 minutes.

3. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 2 is characterized in that: The three-stage steam spray head (19) is provided with three spray heads, and the spray heads are arranged at an angle of -45° to 45° away from the vertical direction of the steam pipeline (3).

4. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 2, characterized in that: The three-stage steam nozzle (19) comprises a Laval nozzle section (21), a curved pipe section (23), an outlet protection cover (25) and a steam outlet (26); the Laval nozzle section (21) is connected to the curved pipe section (23) via a first flange (22); the curved pipe section (23) is connected to the outlet protection cover (25) and the steam outlet (26) via a second flange (24).

5. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 1, characterized in that: The turbulence blade (1) is arranged between the stirring blade (6) and the reaction device cylinder (8), the number of the turbulence blades (1) is 3-8, and the Reynolds number of the slurry at the turbulence blade (1) is 8 times the Reynolds number in the reaction device cylinder (8), so that the slurry is homogenized in the elliptical head (5); The spoiler blade (1) is an arc-shaped plate, the outer arc surface of the arc-shaped plate is connected to the inner wall of the elliptical head (5), a plurality of the arc-shaped plates are distributed circumferentially around the axis of the elliptical head (5), and the arc-shaped plates are arranged obliquely along the axial direction, and slurry channels are formed between the arc-shaped plates.

6. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 1, characterized in that: The water separation and discharging device comprises a liquid phase outlet branch pipe (16), a liquid phase outlet main pipe (15) and a filter screen (12); The two ends of the liquid phase outlet branch pipe (16) are respectively connected to the reaction device cylinder (8) and the liquid phase outlet main pipe (15), and a filter screen (12) is provided between the liquid phase outlet branch pipe (16) and the solid-liquid separation unit (17).

7. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 1, characterized in that: The inner spiral rib type stirring and conveying component (9) is a material turning plate type stirring blade or an inner spiral belt type stirring blade.

8. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 7, characterized in that: The angle of the flip plate of the flip plate type stirring blade is 1 to 15 degrees; the spiral height of the inner spiral belt type stirring blade is 1 / 10 to 1 / 3 of the inner diameter of the reaction device barrel (8), and the conveying rate of the reaction device barrel (8) is 1 / 4 to 1 / 3 of the feeding rate of the reaction device.

9. The homogenization reaction and separation integrated industrial by-product gypsum hydrothermal upgrading device according to claim 1, characterized in that: The solid-liquid separation unit (17) is provided with a safety valve (11) at the top and a slurry outlet flange (20) at the bottom.

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