Solid-liquid reaction kettle

Abstract

The invention provides a solid-liquid reaction kettle, and belongs to the technical field of petrochemical equipment. The reaction kettle comprises a kettle body, a feeding port is formed in the top of the kettle body, a discharging port is formed in the side wall of the kettle body, the discharging port inclines outwards and extends upwards from the side wall of the kettle body, and the included angle between the discharging port and the horizontal direction ranges from 5 degrees to 75 degrees. According to the reaction kettle, the inclined upward discharge hole is formed in the side wall of the kettle body of the reaction kettle, so that the problems that a solid-phase material is discharged along with a liquid phase in a discharging stage and the solid-phase material blocks the discharge hole after short-term and long-term operation of the reaction kettle and during discharging are avoided, the overhaul period of the reaction kettle is shortened, and the overhaul and operation cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of petrochemical equipment, and in particular relates to a solid-liquid reaction kettle. Background Art

[0002] At present, the reactor of petrochemical equipment with solid-liquid two-phase medium is a vertical stirring reactor with a discharge port generally set at the bottom. When the relative material is in liquid phase, the stirring of solid-liquid two-phase materials is prone to unevenness and partial solid phase sinking to the bottom, which may cause the bottom material discharge port and downstream pipeline to be blocked, and the reactor needs to be stopped for regular maintenance. At the same time, since the discharge port is at the bottom of the reactor, the solid phase will be discharged with the material after staying in the reactor for a period of time, and cannot remain in the reactor for a long time. Summary of the invention

[0003] The object of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a solid-liquid reactor, which solves the problem of solid-phase material blocking the discharge port by arranging the discharge port on the side wall of the reactor body.

[0004] The present invention is achieved through the following technical solutions:

[0005] The invention provides a solid-liquid reaction kettle, comprising a kettle body, wherein a feed inlet is arranged on the top of the kettle body, and a discharge outlet is arranged on the side wall of the kettle body.

[0006] A further improvement of the present invention is:

[0007] The discharge port extends outwardly and upwardly from the side wall of the kettle body, and the angle between the discharge port and the horizontal direction is 5° to 75°;

[0008] Preferably, the angle between the discharge port and the horizontal direction is 15 to 60°;

[0009] The horizontal direction refers to the direction of the plane perpendicular to the longitudinal section of the kettle body.

[0010] A further improvement of the present invention is:

[0011] A filter element is arranged inside the discharge port, and an end of the filter element is flush with the side wall of the kettle body.

[0012] A further improvement of the present invention is:

[0013] The filter element is a Johnson mesh, a wire mesh or a metal sintered element.

[0014] A further improvement of the present invention is:

[0015] A single or multiple backwash ports are arranged on the discharge port.

[0016] A further improvement of the present invention is:

[0017] The kettle body is provided with a stirrer; and / or,

[0018] A baffle is fixedly installed inside the kettle body.

[0019] A further improvement of the present invention is:

[0020] The baffle is a vertical plate axially arranged along the inner wall of the kettle body, and a plurality of baffles are evenly arranged along the circumferential direction inside the kettle body.

[0021] A further improvement of the present invention is:

[0022] The outer wall of the kettle body is provided with a jacket, an intermediate layer is formed between the jacket and the outer wall of the kettle body, and a guide plate is provided in the intermediate layer.

[0023] A further improvement of the present invention is:

[0024] The guide plate is spirally wound in the middle layer.

[0025] A further improvement of the present invention is:

[0026] The jacket is connected to the outer wall of the kettle body by welding to form an integral structure, and a plurality of supports are arranged on the jacket along the circumferential direction.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention uses a stirrer and an external jacket to form a solid phase that is suspended in a liquid phase and mixed evenly; by arranging the discharge port on the side wall of the reactor body and slanting upward at an angle of 5° to 75° with the horizontal direction, the problem of solid phase materials being discharged together with the liquid phase during the discharge stage after short-term and long-term operation of the reactor and blocking the discharge port with solid phase materials is avoided, and the maintenance period of the reactor is reduced, and the maintenance and operation costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A structural schematic diagram of a solid-liquid reaction kettle of the present invention.

[0030] In the figure, 1, kettle body, 2, jacket, 3, support, 4, agitator, 5, baffle, 6, inspection port, 7, feed port, 8, jacket outlet, 9, discharge port, 9-1, filter element, 9-2, backwash port, 10, guide plate, 11, jacket inlet, 12, sewage outlet. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0032] [Example 1]

[0033] like Figure 1 As shown, the present invention provides a solid-liquid reaction kettle, comprising a kettle body 1, a feed inlet 7 is provided on the top of the kettle body 1, and the feed inlet 7 can be provided in single or multiple ways;

[0034] A discharge port 9 is provided at the middle and lower part of the side wall of the kettle body 1, which can prevent most of the solid phase materials from being discharged together with the liquid phase during the discharge stage, and prevent the solid phase materials from blocking the discharge port 9. After the reaction is completed, the discharge is carried out. When discharging, the material is forced to be discharged from the discharge port 9 by using an upstream or downstream pressure source; for example, by connecting the discharge port to a pump through an external pipeline, a pump is used to realize forced circulation.

[0035] A drain outlet 12 is provided at the bottom of the kettle body, and solid materials deposited at the bottom of the kettle body can be cleaned from the drain outlet 12 when necessary.

[0036] [Example 2]

[0037] like Figure 1 As shown, the discharge port 9 extends upward and outward from the side wall of the kettle body 1, and the angle between the discharge port and the horizontal direction is 5° to 75°. Preferably, the angle between the discharge port and the horizontal direction is 15° to 60°, wherein the horizontal direction refers to the direction of the plane perpendicular to the longitudinal section of the kettle body. The inclination angle of the discharge port 9 is related to the characteristics of the solid phase material. The inclination angle makes it difficult for the solid phase material entrained by the liquid phase to enter the downstream pipeline, and can return to the reactor according to its own weight.

[0038] In the present invention, a certain inclination angle is set between the discharge port and the horizontal direction, so that the solid-phase material can enter the kettle body under the interception of the filter element during discharge, which will not affect the subsequent discharge effect and pressure drop, and the corresponding backwashing times will also be reduced; when the angle between the discharge port and the horizontal direction is 0°, the solid-phase material filtered out during the discharge process will accumulate outside the filter element, mainly in the gap between the discharge port pipe orifice and the filter element, affecting the subsequent discharge efficiency and pressure drop, and will also increase the backwashing times and increase the maintenance cost.

[0039] [Example 3]

[0040] A filter element 9-1 is disposed inside the discharge port 9 to further intercept the solid phase material entering the discharge port 9. The type of the filter element 9-1 can be a Johnson mesh, a metal wire mesh, or a metal sintered element according to the particle size distribution of the solid phase material. The filter element 9-1 is flush with the side wall of the kettle body 1 to avoid intercepting excess solid phase material.

[0041] After the reactor has been running for a long time, a small amount of solid phase material will adhere to the outside of the filter element 9-1, partially blocking the filter surface, reducing the filter area and interception efficiency, and resulting in a decrease in the liquid phase discharge flow rate. In order to ensure the long-term operation of the reactor, a single or multiple backwash ports 9-2 are set on the discharge port 9, which can automatically clean the filter element 9-1 from the inside to the outside according to the abnormal changes in the reactor discharge flow rate and the abnormal increase in the pressure drop between the reactor and the downstream pipeline, clean the solid phase material attached to the filter element 9-1, and regenerate the filter area of ​​the filter element 9-1, thereby reducing the maintenance frequency of the reactor and reducing the maintenance cost.

[0042] Specifically, a flange is welded at the end of the discharge port, a matching flange is connected to the flange by bolts, a through hole is set in the middle of the flange and the matching flange, the discharge pipe passes through the through hole and extends into the discharge port, and at least one backwash port is set on the flange and the matching flange along the outer side of the through hole, a backwash pipe is inserted into the backwash port, and when backwashing is required, cleaning liquid is introduced through the backwash pipe to clean off the solid phase material attached to the filter element.

[0043] Taking into account that the backwash effect of the filter element 9-1 decreases with the increase in the number of backwashing times, the connection between the filter element 9-1 and the discharge port 9 is set as a detachable structure, which can be a threaded connection or a clamping structure. When the reactor is overhauled, only the filter element 9-1 needs to be replaced, and there is no need to replace the entire discharge port 9, thereby reducing the maintenance period of the reactor and reducing the maintenance and operation costs of the reactor.

[0044] [Example 4]

[0045] A stirrer 4 is provided in the reactor body 1. The purpose of stirring is not only to mix the materials, but also to suspend the solid phase materials in the liquid phase, mix them evenly, and prevent the solid phase materials from being deposited at the bottom of the reactor.

[0046] A baffle 5 is fixedly installed inside the kettle body 1, and its height is not lower than the highest liquid level of the material, so that the vortex generated by the agitator 4 when stirring the material can be completely intercepted by the internal baffle 5, causing the material to flow turbulently in the kettle body 1, thereby effectively improving the possibility of uneven stirring of the material.

[0047] Furthermore, the baffle 5 is a vertical plate arranged axially along the inner wall of the kettle body 1, and a plurality of baffles 5 are evenly arranged circumferentially inside the kettle body 1, preferably 3 to 8 baffles, and the baffles 5 are welded to the inner wall of the kettle body 1 through a connecting plate. The main function of the baffle is to eliminate eddy currents during stirring, improve the main circulation, increase the degree of turbulence, and improve the stirring effect.

[0048] [Example 5]

[0049] A jacket 2 is provided on the outer wall of the kettle body 1, and the setting height of the jacket 2 is not lower than the highest liquid level of the material. An intermediate layer is formed between the jacket 2 and the outer wall of the kettle body 1, and a guide plate 10 is provided in the intermediate layer, and the guide plate 10 is spirally wound in the intermediate layer. Therefore, after the heat medium enters from the jacket inlet 11, it flows along the guide plate 10 in the intermediate layer in a spiral manner without dead zones, fully heating the material in the kettle body 1, so that the material temperature meets the temperature required for the reaction, while reducing the residual solid phase material, and the heat medium is discharged from the jacket outlet 8.

[0050] The present invention adopts a jacket structure with a spiral channel, which can avoid dead zones in the flow of heat medium in the jacket 2, maximize the use of the heating area of ​​the jacket 2, and achieve sufficient heat exchange between the heat medium in the jacket 2 and the medium in the kettle body 1.

[0051] Furthermore, the jacket 2 is connected to the outer wall of the kettle body 1 by welding to form an integral structure, and a plurality of supports 3 are circumferentially arranged on the jacket 2 for supporting the jacket, and the supports are welded on the jacket.

[0052] [Example 6]

[0053] An inspection port is provided on the reactor body for inspecting the blades of the agitator 4. The structural type of the inspection port 6 may be an equipment flange or a manhole according to the size of the reactor.

[0054] Specifically: when the size of the reactor is small, a manhole cannot be set on the reactor body 1, and a reactor cover is set on the top of the reactor body. The reactor body and the reactor cover are connected by a flange. When maintenance is needed, the reactor cover can be opened for maintenance; when the size of the reactor is large, a manhole is set on the upper part of the reactor body as an inspection port for the agitator.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0057] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A solid-liquid reactor, characterized in that: The kettle comprises a kettle body, the top of which is provided with a feed inlet, and the side wall of which is provided with a discharge outlet.

2. The solid-liquid reaction kettle according to claim 1, characterized in that: The discharge port extends outwardly and upwardly from the side wall of the kettle body, and the angle between the discharge port and the horizontal direction is 5° to 75°; Preferably, the angle between the discharge port and the horizontal direction is 15 to 60°; The horizontal direction refers to the direction of the plane perpendicular to the longitudinal section of the kettle body.

3. The solid-liquid reaction kettle according to claim 2, characterized in that: A filter element is arranged inside the discharge port, and the end of the filter element is flush with the side wall of the kettle body.

4. The solid-liquid reaction kettle according to claim 3, characterized in that: The filter element is a Johnson mesh, a wire mesh or a metal sintered element.

5. The solid-liquid reaction kettle according to any one of claims 1 to 4, characterized in that: A single or multiple backwash ports are arranged on the discharge port.

6. The solid-liquid reaction kettle according to claim 1, characterized in that: The kettle body is provided with a stirrer; and / or, A baffle is fixedly installed inside the kettle body.

7. The solid-liquid reaction kettle according to claim 1, characterized in that: The baffle is a vertical plate axially arranged along the inner wall of the kettle body, and a plurality of baffles are evenly arranged along the circumferential direction inside the kettle body.

8. The solid-liquid reaction kettle according to claim 1, characterized in that: The outer wall of the kettle body is provided with a jacket, an intermediate layer is formed between the jacket and the outer wall of the kettle body, and a guide plate is provided in the intermediate layer.

9. The solid-liquid reaction kettle according to claim 8, characterized in that: The guide plate is spirally wound in the middle layer.

10. The solid-liquid reaction kettle according to claim 8, characterized in that: The jacket is connected to the outer wall of the kettle body by welding to form an integral structure, and a plurality of supports are arranged on the jacket along the circumferential direction.

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