Pressure stabilizing device of polyacrylamide reaction kettle

Abstract

The utility model discloses a pressure stabilizing device of a polyacrylamide reaction kettle, and relates to the technical field of pressure stabilization of reaction kettles. The pressure stabilizing device comprises a buffer cylinder, a spring cylinder, a pressure stabilizing piston and a pressure adjusting assembly, the pressure stabilizing piston is slidably sleeved with the buffer cylinder, the lower end of a beam end sleeve fixedly sleeved with the lower end of the buffer cylinder is communicated with an air guide pipe, the spring cylinder is arranged on a cylinder end cover fixedly sleeved with the upper end of the buffer cylinder, and the pressure adjusting assembly is arranged at the upper end of the spring cylinder. The upper end of a compression spring sleeved with the spring barrel is in transmission connection with the pressure adjusting assembly. The gas guide pipe at the lower end of the beam end sleeve at the bottom end of the buffer cylinder is connected with the reaction kettle, and gas in the reaction kettle enters the buffer cylinder to push the pressure stabilizing piston to move upwards, so that the volume in the buffer cylinder is increased, and the gas pressure is reduced; the pressure of the compression spring is adjusted through the pressure adjusting assembly, so that the pressure of the compression spring on the pressure stabilizing piston is adjusted, and the air pressure in the buffer cylinder and the reaction kettle is controlled.

Description

Technical Field

[0001] This utility model belongs to the field of pressure stabilization technology for reaction vessels, and in particular relates to a pressure stabilization device for a polyacrylamide reaction vessel. Background Technology

[0002] In the preparation of polyacrylamide, especially in aqueous solution polymerization, it is necessary to suppress solvent boiling by pressurization, allow the reaction to proceed at the required temperature above the atmospheric boiling point, and maintain temperature stability. Furthermore, it is crucial to prevent serious safety accidents such as explosive boiling, overpressure explosions, and leakage of toxic monomers due to pressure runaway. Therefore, during the preparation of polyacrylamide, the pressure inside the reactor needs to be adjusted according to the requirements of each preparation stage, and the pressure inside the reactor must be kept stable. The common method for achieving reactor pressure stabilization is to install a safety valve on the reactor lid and to regulate the gas pressure by injecting inert gas into the reactor. However, this method has drawbacks: when the pressure reaches a threshold, the gas inside the reactor is directly discharged; when the temperature inside the reactor decreases, the gas pressure in the reactor can easily drop, thus disrupting the pressure stabilization state.

[0003] To address these issues, we provide a pressure stabilizing device for a polyacrylamide reactor. Utility Model Content

[0004] The purpose of this invention is to provide a pressure stabilizing device for a polyacrylamide reactor. A pressure stabilizing piston is vertically slidably connected inside a buffer cylinder. A gas guide pipe at the lower end of the buffer cylinder's flow end is connected to the reactor. A spring cylinder is installed on the end cap at the top of the buffer cylinder, and a compression spring is fitted inside the spring cylinder. When the pressure inside the reactor increases, gas enters the buffer cylinder through the gas guide pipe and pushes the pressure stabilizing piston upwards, thereby stabilizing the gas pressure in the reactor and the buffer cylinder. A pressure regulating component is vertically installed at the upper end of the spring cylinder. When the gas pressure inside the reactor increases, the gas pressure pushes the pressure stabilizing piston to compress the compression spring. The pressure of the compression spring is adjusted by the pressure regulating component, thereby adjusting the pressure of the compression spring on the pressure stabilizing piston until the pressure of the gas entering the buffer cylinder pushing the pressure stabilizing piston is regulated, thus achieving pressure regulation of the buffer cylinder and the reactor.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a pressure stabilizing device for a polyacrylamide reactor, comprising a buffer cylinder, a spring cylinder, a pressure stabilizing piston, and a pressure regulating component. The pressure stabilizing piston is slidably sleeved inside the buffer cylinder. A beam end sleeve is fixedly sleeved at the lower end of the buffer cylinder, and a gas guide pipe is connected to the lower end of the beam end sleeve. A cylinder end cap is fixedly sleeved at the upper end of the buffer cylinder. The spring cylinder is located at the upper end of the cylinder end cap and is connected to the cylinder end cap. A top cap is fixedly sleeved at the upper end of the spring cylinder. The pressure regulating component is located at the upper end of the spring cylinder. A compression spring is sleeved inside the spring cylinder, and the upper end of the compression spring is connected to the pressure regulating component in a transmission manner.

[0007] A further feature of this invention is that the pressure regulating assembly includes a lifting threaded cylinder and a lower pressure plate. The lifting threaded cylinder is threadedly screwed into the top cover, and the lower pressure plate is sleeved inside the spring cylinder. The lower pressure plate is fixedly sleeved on the lower outer side of the lifting threaded cylinder, and the upper end of the compression spring is fixedly connected to the lower end plate surface of the lower pressure plate.

[0008] A further feature of this invention is that a set of vertical support rods is fixedly provided on the upper end face of the pressure stabilizing piston, a transition plate is fixedly provided on the upper end face of the set of vertical support rods, the lower end of the compression spring is fixedly connected to the upper end plate surface of the transition plate, vertical sliding ribs are fixedly provided on the outer side of the vertical support rods, and vertical sliding grooves are arranged in a circumferential array on the inner wall of the spring cylinder, with each vertical sliding rib slidingly sleeved in the vertical sliding groove.

[0009] A further feature of this invention is that a pressure regulating screw is screwed into the internal thread of the lifting screw cylinder, and a through hole for the screw is opened through the surface of the adapter plate. The diameter of the through hole is larger than the diameter of the pressure regulating screw. A screw end cap is fixedly sleeved on the lower end of the pressure regulating screw, and the upper end face of the screw end cap is attached to the lower end face of the adapter plate.

[0010] A further feature of this invention is that a screw turntable is fixedly provided on the outer side of the upper end of the pressure regulating screw, and a cylinder turntable is fixedly provided on the outer side of the upper end of the lifting threaded cylinder.

[0011] A further feature of this invention is that a set of pressure relief pipe through holes are circumferentially arranged through the plate surface of the pressure stabilizing piston. A pressure relief pipe is fixedly sleeved inside the pressure relief pipe through holes. The lower end of the pressure relief pipe is closed and the upper end is open. A vent hole is circumferentially arranged through the side wall of the lower end face of the pressure stabilizing piston. A pressure relief spring is fixedly connected to the bottom surface of the pressure relief pipe. A pressure relief valve core is fixedly connected to the upper end of the pressure relief spring. The pressure relief valve core is vertically slidably sleeved inside the pressure relief pipe. A set of vent pipe through holes is circumferentially arranged through the cover surface of the cylinder end cap. A vent pipe is fixedly sleeved inside the vent pipe through holes. The vent pipe extends downward. Each vent pipe is vertically slidably sleeved inside its respective pressure relief pipe.

[0012] A further feature of this invention is that an inner sleeve is fixedly fitted to the lower end of the air outlet pipe, and a cross arm is fixedly arranged in a circumferential array on the inner wall of the inner sleeve. A top valve stem is fixedly attached to the lower end of the cross arm extending downward.

[0013] This utility model has the following beneficial effects:

[0014] This invention involves vertically sliding a pressure-stabilizing piston inside a buffer cylinder, connecting the flow-generating end of the buffer cylinder to the gas guide pipe at the bottom, and installing a spring cylinder on the end cap at the top of the buffer cylinder, with a compression spring inside the spring cylinder. When the pressure inside the reactor increases, gas enters the buffer cylinder from the gas guide pipe and pushes the pressure-stabilizing piston upward, thereby stabilizing and balancing the gas pressure in the reactor and the buffer cylinder.

[0015] This invention uses a vertical pressure regulating component at the upper end of the spring cylinder. When the gas pressure inside the reactor increases, the gas pressure pushes the pressure stabilizing piston to compress the spring. The pressure of the compression spring is adjusted by the pressure regulating component, thereby adjusting the pressure of the compression spring on the pressure stabilizing piston. This adjusts the pressure of the gas entering the buffer cylinder that pushes the pressure stabilizing piston, thus controlling the gas pressure inside the buffer cylinder and the reactor.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a pressure stabilizing device for a polyacrylamide reactor.

[0019] Figure 2 This is an exploded view of the lifting threaded cylinder and the spring cylinder.

[0020] Figure 3 This is an exploded view of the pressure regulating component and the pressure stabilizing piston.

[0021] Figure 4 This is a schematic diagram showing the disassembled pressure relief pipe and pressure stabilizing piston.

[0022] Figure 5 This is a schematic diagram of the structure of the vent pipe and the top valve stem.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Buffer cylinder, 101-Beam end sleeve, 101a-Gas guide tube, 102-Cylinder end cap, 102a-Outlet pipe through hole, 102b-Outlet pipe, 102b-1-Inner sleeve clamp, 102b-2-Cross arm, 102b-3-Top valve stem, 2-Spring cylinder, 201-Compression spring, 202-Top cap, 203-Vertical slide groove, 3-Pressure stabilizing piston, 301-Vertical support rod, 301a-Adapter plate 301a-1-Screw through hole, 301b-Vertical sliding rib, 302-Pressure relief pipe through hole, 302a-Pressure relief pipe, 302a-1-Vent hole, 302a-2-Pressure relief spring, 302a-3-Pressure relief valve core, 4-Pressure adjustment assembly, 401-Lifting threaded cylinder, 401a-Cylinder turntable, 402-Lower pressure plate, 403-Pressure adjustment screw, 403a-Screw end cap, 403b-Screw turntable. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0026] Please see Figures 1 to 3 This utility model relates to a pressure stabilizing device for a polyacrylamide reactor, comprising a buffer cylinder 1, a spring cylinder 2, a pressure stabilizing piston 3, and a pressure regulating component 4. The pressure stabilizing piston 3 is vertically slidably fitted inside the buffer cylinder 1. A gas guide pipe 101a at the lower end of the flow-through sleeve 101 at the bottom of the buffer cylinder 1 is connected to the reactor. A spring cylinder 2 is mounted on the end cap 102 at the top of the buffer cylinder 1, and a compression spring 201 is fitted inside the spring cylinder 2. When the pressure inside the reactor increases, gas enters the buffer cylinder 1 from the gas guide pipe 101a and pushes the pressure stabilizing piston 3 upward, thereby stabilizing the gas pressure in the reactor and the buffer cylinder 1. A pressure regulating component 4 is vertically positioned at the upper end of the spring cylinder 2. When the gas pressure inside the reactor increases, the gas pressure pushes the pressure stabilizing piston 3 to compress the compression spring 201. The pressure of the compression spring 201 is adjusted by the pressure regulating component 4, thereby adjusting the pressure of the compression spring on the pressure stabilizing piston 3. This regulates the pressure of the gas entering the buffer cylinder 1 pushing the pressure stabilizing piston 3, thus controlling the gas pressure inside the buffer cylinder 1 and the reactor.

[0027] Specifically, the pressure stabilizing piston 3 is slidably sleeved inside the buffer cylinder 1. A beam end sleeve 101 is fixedly sleeved at the lower end of the buffer cylinder 1. A gas guide pipe 101a is connected to the lower end of the beam end sleeve 101. A cylinder end cap 102 is fixedly sleeved at the upper end of the buffer cylinder 1. A spring cylinder 2 is located at the upper end of the cylinder end cap 102 and is connected to the cylinder end cap 102. A top cap 202 is fixedly sleeved at the upper end of the spring cylinder 2. A pressure regulating component 4 is located at the upper end of the spring cylinder 2. A compression spring 201 is sleeved inside the spring cylinder 2. The upper end of the compression spring 201 is connected to the pressure regulating component 4 in a transmission manner.

[0028] Furthermore, the pressure regulating component 4 includes a lifting threaded cylinder 401 and a lower pressure plate 402. The lifting threaded cylinder 401 is threadedly screwed into the top cover 202, and the lower pressure plate 402 is sleeved inside the spring cylinder 2. The lower pressure plate 402 is fixedly sleeved on the lower outer side of the lifting threaded cylinder 401. The upper end of the compression spring 201 is fixedly connected to the lower end plate surface of the lower pressure plate 402. Rotating the lifting threaded cylinder 401 causes the lifting threaded cylinder 401 to drive the lower pressure plate 402 to move, thereby controlling the height of the compression spring 201. This causes the pressure stabilizing piston 3 at the lower end of the compression spring 201 to move up and down inside the buffer cylinder 1, thereby adjusting the volume in the buffer cylinder 1.

[0029] Furthermore, a set of vertical support rods 301 are fixedly mounted on the upper end face of the pressure stabilizing piston 3, and a transition plate 301a is fixedly mounted on the upper end face of the set of vertical support rods 301. The lower end of the compression spring 201 is fixedly connected to the upper end face of the transition plate 301a. Vertical sliding ribs 301b are fixedly mounted on the outer side of the vertical support rods 301. Vertical sliding grooves 203 are circumferentially arrayed on the inner wall of the spring cylinder 2. Each vertical sliding rib 301b is vertically slidably sleeved in each vertical sliding groove 203. A pressure adjusting screw 403 is screwed into the internal thread of the lifting threaded cylinder 401. A screw through hole 301a-1 is opened through the face of the transition plate 301a. The orifice diameter of 1 is larger than the rod diameter of the pressure regulating screw 403. The lower end of the pressure regulating screw 403 is fixedly sleeved with a screw end cap 403a. The upper end face of the screw end cap 403a is attached to the lower end face of the adapter plate 301a. Rotating the regulating screw 403 causes the regulating screw 403 to drive the pressure stabilizing piston 3 to move up and down in the buffer cylinder 1, thereby causing the adapter plate 301a to squeeze the compression spring 201, changing the pressure of the compression spring 201, and thus adjusting the pressure of the compression spring on the pressure stabilizing piston 3. This allows the pressure of the gas entering the buffer cylinder 1 that pushes the pressure stabilizing piston 3 to be adjusted, thereby achieving control of the gas pressure in the buffer cylinder 1 and the reactor.

[0030] Furthermore, a screw turntable 403b is fixed to the upper outer side of the pressure adjusting screw 403, and a cylinder turntable 401a is fixed to the upper outer side of the lifting screw cylinder 401, so as to facilitate the rotation of the adjusting screw 403 and the lifting screw cylinder 401.

[0031] The operation process in this embodiment is as follows:

[0032] According to the gas pressure required at each stage of the reaction vessel, the screw turntable 403b and the cylinder turntable 401a are rotated, causing the adjusting screw 403 to drive the pressure stabilizing piston 3 to move up and down in the buffer cylinder 1. This causes the transition plate 301a to squeeze the compression spring 201, changing the pressure of the compression spring 201, and thus adjusting the pressure of the compression spring on the pressure stabilizing piston 3. This regulates the pressure of the gas entering the buffer cylinder 1 that pushes the pressure stabilizing piston 3, thereby controlling the gas pressure in the buffer cylinder 1 and the reaction vessel. When the pressure in the reaction vessel increases, gas enters the buffer cylinder 1 from the gas guide pipe 101a and pushes the pressure stabilizing piston 3 upward, thereby stabilizing the gas pressure in the reaction vessel and the buffer cylinder 1. Example 2

[0033] Please see Figures 1 to 5 Based on Example 1, a set of pressure relief pipes 302a are circumferentially connected to the plate surface of the pressure stabilizing piston 3, and a set of air outlet pipes 102b are circumferentially connected to the plate surface of the cylinder end cap 102. By vertically inserting the lower ends of each air outlet pipe 102b into each pressure relief pipe 302a, a pressure relief spring 302a-2 is set at the bottom end of the pressure relief pipe 302a, and a pressure relief valve core 302a-3 is fixedly connected to the upper end of the pressure relief spring 302a-2. When the air pressure in the buffer cylinder 1 exceeds the threshold, the air pressure pushes the pressure stabilizing piston 3 to move upward continuously until the air outlet pipe 102b pushes the pressure relief valve core 302a-3 downward, thereby causing the gas in the buffer cylinder 2 to be discharged from the air outlet pipe 102b.

[0034] Specifically, a set of pressure relief pipe through holes 302 are circumferentially arrayed through the plate surface of the pressure stabilizing piston 3. A pressure relief pipe 302a is fixedly sleeved inside the pressure relief pipe through holes 302. The lower end of the pressure relief pipe 302a is closed and the upper end is open. A vent hole 302a-1 is circumferentially arrayed through the side wall of the lower end face of the pressure stabilizing piston 3. A pressure relief spring 302a-2 is fixedly connected to the bottom surface of the pressure relief pipe 302a. -2 is fixedly connected to the upper end of a pressure relief valve core 302a-3, which is vertically slidably sleeved in the pressure relief pipe 302a; the cover surface of the cylinder end cap 102 is provided with a set of air outlet pipe through holes 102a in a circumferential array, and an air outlet pipe 102b is fixedly sleeved in the air outlet pipe through hole 102a. The air outlet pipe 102b extends downward, and each air outlet pipe 102b is vertically slidably sleeved in the respective pressure relief pipe 302a.

[0035] Furthermore, an inner sleeve 102b-1 is fixedly sleeved at the lower end of the air outlet pipe 102b. A cross arm 102b-2 is fixedly arranged in a circumferential array on the inner wall of the inner sleeve 102b-1. A top valve stem 102b-3 is fixedly arranged on the lower end of the cross arm 102b-2 extending downward.

[0036] The operation process in this embodiment is as follows:

[0037] When the gas in the buffer cylinder 1 reaches the threshold, the gas pressure pushes the pressure stabilizing piston 3 to move upward continuously, causing the top valve rod 102b-3 to push the pressure relief valve core 302a-3 in the pressure relief pipe 302a downward, so that the gas in the buffer cylinder 1 enters the pressure relief pipe 302a through the vent hole 302a-1 on the lower side wall of the pressure relief pipe 302a, and the gas is discharged from the buffer cylinder 1 along the outlet pipe 102b, thereby reducing the gas pressure in the buffer cylinder 1 to a safe range.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A pressure stabilizing device for a polyacrylamide reactor, comprising a buffer cylinder (1), a spring cylinder (2), a pressure stabilizing piston (3), and a pressure regulating assembly (4), characterized in that: The pressure stabilizing piston (3) is slidably sleeved inside the buffer cylinder (1). A beam end sleeve (101) is fixedly sleeved at the lower end of the buffer cylinder (1). A gas guide pipe (101a) is connected to the lower end of the beam end sleeve (101). A cylinder end cap (102) is fixedly sleeved at the upper end of the buffer cylinder (1). A spring cylinder (2) is set at the upper end of the cylinder end cap (102) and is connected to the cylinder end cap (102). A top cap (202) is fixedly sleeved at the upper end of the spring cylinder (2). A pressure regulating component (4) is set at the upper end of the spring cylinder (2). A compression spring (201) is sleeved inside the spring cylinder (2). The upper end of the compression spring (201) is connected to the pressure regulating component (4) in a transmission connection.

2. The pressure stabilizing device for a polyacrylamide reactor according to claim 1, characterized in that: The pressure regulating assembly (4) includes a lifting threaded cylinder (401) and a lower pressure plate (402). The lifting threaded cylinder (401) is threaded into the top cover (202). The lower pressure plate (402) is sleeved in the spring cylinder (2). The lower pressure plate (402) is fixedly sleeved on the lower outer side of the lifting threaded cylinder (401). The upper end of the compression spring (201) is fixedly connected to the lower end plate surface of the lower pressure plate (402).

3. The pressure stabilizing device for a polyacrylamide reactor according to claim 2, characterized in that: A set of vertical support rods (301) is fixedly provided on the upper end face of the pressure stabilizing piston (3). A transition plate (301a) is fixedly provided on the upper end face of the set of vertical support rods (301). The lower end of the compression spring (201) is fixedly connected to the upper end plate of the transition plate (301a). A vertical sliding rib (301b) is fixedly provided on the outer side of the vertical support rod (301). A vertical sliding groove (203) is circumferentially arrayed on the inner wall of the spring cylinder (2). Each vertical sliding rib (301b) is vertically slidably sleeved in each vertical sliding groove (203).

4. The pressure stabilizing device for a polyacrylamide reactor according to claim 3, characterized in that: The lifting threaded cylinder (401) is internally threaded with a pressure adjusting screw (403). The adapter plate (301a) has a through hole (301a-1) for the screw. The diameter of the through hole (301a-1) is larger than the diameter of the pressure adjusting screw (403). The lower end of the pressure adjusting screw (403) is fixedly sleeved with a screw end cap (403a). The upper end face of the screw end cap (403a) is attached to the lower end face of the adapter plate (301a).

5. The pressure stabilizing device for a polyacrylamide reactor according to claim 4, characterized in that: The upper outer side of the pressure regulating screw (403) is fixed with a screw turntable (403b), and the upper outer side of the lifting screw cylinder (401) is fixed with a cylinder turntable (401a).

6. The pressure stabilizing device for a polyacrylamide reactor according to claim 1, characterized in that: The pressure-stabilizing piston (3) has a set of pressure relief pipe through holes (302) arranged in a circumferential array on its plate surface. A pressure relief pipe (302a) is fixedly sleeved in the pressure relief pipe through holes (302). The lower end of the pressure relief pipe (302a) is closed and the upper end is open. A vent hole (302a-1) is arranged in a circumferential array on the side wall of the lower end face of the pressure-stabilizing piston (3). A pressure relief spring (302a-2) is fixedly connected to the bottom surface of the pressure relief pipe (302a). A pressure relief valve core (302a-3) is fixedly connected to the upper end of the pressure relief spring (302a-2). The pressure relief valve core (302a-3) is vertically slidably sleeved in the pressure relief pipe (302a). The end cap (102) of the cylinder has a set of vent pipe through holes (102a) arranged in a circumferential array on the cover surface. Vent pipes (102b) are fixedly sleeved in the vent pipe through holes (102a). The vent pipes (102b) extend downward and each vent pipe (102b) is vertically slidably sleeved in each pressure relief pipe (302a).

7. The pressure stabilizing device for a polyacrylamide reactor according to claim 6, characterized in that: The lower end of the air outlet pipe (102b) is fixedly fitted with an inner sleeve (102b-1), and a cross arm (102b-2) is fixedly arranged in a circumferential array on the inner wall of the inner sleeve (102b-1). A top valve stem (102b-3) is fixedly arranged on the lower end of the cross arm (102b-2) extending downward.

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