A continuous sheet caustic feeding system for a diluent production

Abstract

This invention provides a continuous caustic soda flake feeding system for diluent production, including a silo. A vibrating screen is inclinedly arranged below the discharge port of the silo. The lower part of the vibrating screen is connected to the inlet of a feeding pipe, and the outlet of the feeding pipe is connected to the inlet of a reaction vessel. A helical blade shaft is rotatably connected in the feeding pipe, and one end of the helical blade shaft is fixedly connected to the drive shaft of a drive motor. This invention solves the problem of high safety risks and negative impact on product quality when manually adding caustic soda flakes during diluent production.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a continuous caustic soda feeding system for diluent production. Background Technology

[0002] Epoxy resin thinners are generally used in conjunction with base resins to reduce the viscosity of the cured system, increase fluidity, extend service life, and facilitate large-area construction. While improving operability, they do not affect the basic properties of the cured product, making them suitable for applications such as casting, pouring, bonding, sealing, and impregnation. Traditional caustic soda flakes are added manually by opening the reactor lid and adding the flakes directly. Caustic soda flakes contain dust, which can escape during direct addition, causing corrosion on wet surfaces and skin contact. Furthermore, the presence of flammable and explosive solvents in the reactor can lead to solvent leakage, creating unpleasant odors and triggering flammable and toxic gas detectors. Direct addition with the lid open can also generate static electricity or create an explosive atmosphere. Uneven manual addition can lead to numerous side reactions, significantly impacting equipment and causing malfunctions in agitators. Uneven addition can also jam agitators, causing them to malfunction. Additionally, uneven addition can result in localized high alkali concentrations, leading to more side reactions, affecting product quality and reducing yield. Thank you. Therefore, it is necessary to invent a continuous caustic soda feeding system for diluent production. Utility Model Content

[0003] The purpose of this invention is to provide a continuous caustic soda flake feeding system for diluent production, which solves the problem of high safety risks and negative impact on product quality when manually adding caustic soda flakes during diluent production.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A continuous caustic soda flake feeding system for diluent production includes a silo, a vibrating screen inclinedly disposed below the discharge port of the silo, the lower part of the vibrating screen being connected to the inlet of a feeding pipe, and the outlet of the feeding pipe being connected to the inlet of a reaction vessel; a helical blade shaft is rotatably connected in the feeding pipe, and one end of the helical blade shaft is fixedly connected to the drive shaft of a drive motor.

[0006] Preferably, in conjunction with the above scheme, the upper air outlet of the silo is connected to a blower, and the air outlet of the blower is connected to the air inlet of the water seal trough.

[0007] Preferably, in conjunction with the above scheme, the water seal tank is equipped with a level gauge and a pH sensor, the water inlet pipe of the water seal tank is equipped with a level control valve associated with the level gauge, and the water outlet pipe of the water seal tank is equipped with a pH control valve associated with the pH sensor. The level gauge, pH sensor, level control valve, and pH control valve are all connected to a controller; the water outlet pipe of the water seal tank is connected to the water-gas-material inlet of the reactor.

[0008] Preferably, in conjunction with the above scheme, the pipeline of the water-gas material inlet is connected to a vent condenser, a nitrogen control valve, a temperature transmitter, and a first pressure transmitter, and the vent condenser, nitrogen control valve, temperature transmitter, and first pressure transmitter are all connected to the controller.

[0009] Preferably, in conjunction with the above scheme, a first pipe is connected to the first circulation port at the upper part of the reactor. The first pipe is used to introduce steam into the reactor. A first steam control valve, a first temperature control valve, and a second pressure transmitter are provided on the first pipe. The first steam control valve, the first temperature control valve, and the second pressure transmitter are all connected to a controller.

[0010] Preferably, in conjunction with the above scheme, a second pipe is connected to the first pipe, and the second pipe is used for circulating water outlet; a third pipe is connected to the second circulation port at the top of the reactor, and the third pipe is used for circulating water outlet; both the second and third pipes are connected to the circulating water system; a first circulating water outlet control valve is installed on the second pipe, and a second circulating water outlet control valve is installed on the third pipe; both the first and second circulating water outlet control valves are connected to a controller.

[0011] Preferably, in conjunction with the above scheme, a fourth pipe is connected to the third circulation port at the bottom of the reactor. The fourth pipe is used for circulating water inlet and is connected to the circulating water system. A first circulating water inlet control valve is installed on the fourth pipe and is connected to the controller.

[0012] Preferably, in conjunction with the above scheme, a fifth pipe and a sixth pipe are connected in parallel on the fourth circulation port at the bottom of the reactor. The fifth pipe is used for the intake of circulating water and is connected to the circulating water system; the sixth pipe is used for the discharge of steam condensate.

[0013] Preferably, in conjunction with the above scheme, the fifth pipeline is equipped with a second circulating water inlet control valve XV and a second temperature control valve, and the sixth pipeline is equipped with a second steam control valve. The second circulating water inlet control valve, the second temperature control valve and the second steam control valve are all connected to the controller.

[0014] Preferably, in conjunction with the above scheme, a pneumatic slide valve is connected between the outlet of the feed pipe and the inlet of the reactor.

[0015] The beneficial effects of this utility model are as follows: This utility model can automatically transport caustic soda flakes in the silo to the reactor through the feeding pipe and the spiral blade shaft. The opening and closing of each pipeline can be controlled by PLC or DCS. The caustic soda feeding and reaction process can achieve full-process automated control without human intervention and automatic adjustment, thus ensuring the safety of the production process.

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a diagram of a continuous alkali feeding system for producing diluent according to this utility model. Detailed Implementation

[0018] like Figure 1 The system shown is a continuous caustic soda flake feeding system for diluent production, including a silo 3. A vibrating screen 4 is inclinedly arranged below the discharge port of the silo 3. The lower part of the vibrating screen 4 is connected to the inlet of a feeding pipe 6, and the outlet of the feeding pipe 6 is connected to the inlet 81 of a reaction vessel 8. A spiral blade shaft 7 is rotatably connected in the feeding pipe 6, and one end of the spiral blade shaft 7 is fixedly connected to the drive shaft of a drive motor 5.

[0019] The upper air outlet of the silo 3 is connected to a blower 2, and the air outlet of the blower 2 is connected to the air inlet of the water seal tank 1. After turning on the blower 2 and the vibrating screen 4, caustic soda flakes are added into the silo 5, maintaining a slight negative pressure inside the silo 5 to guide the caustic soda flake dust into the water seal tank 1, thus ensuring that the caustic soda flakes do not overflow.

[0020] The water seal tank 1 is equipped with a level gauge L1 and a pH sensor X1. A level control valve XV1, associated with the level gauge L1, is installed on the inlet pipe of the water seal tank 1, and a pH control valve XV2, associated with the pH sensor X1, is installed on the outlet pipe of the water seal tank 1. The level gauge L1, pH sensor X1, level control valve XV1, and pH control valve XV2 are all connected to a controller. The outlet pipe of the water seal tank 1 is connected to the water / gas material inlet 82 of the reactor 8. The water / gas material inlet 82 can also be connected to a vacuum device via a pipeline. After the caustic soda dust in the water seal tank 1 dissolves, the pH value of the solution in the water seal tank 1 needs to be controlled below 14. When the pH sensor X1 detects that the pH value reaches 14, the controller opens the pH control valve XV2, discharging the alkali solution in the water seal tank 1 to the water / gas material inlet 82 of the reactor 8. After the level gauge L1 detects that the liquid level has dropped to a certain level, the controller controls the level control valve XV1 to open, adding new process water.

[0021] The water / gas material inlet 82 is connected to a vent condenser 9, a nitrogen control valve XV3, a temperature transmitter T1, and a first pressure transmitter P1. These components are all connected to a controller. During the high-temperature reaction, the gas or vapor generated inside the reactor 8 is cooled and liquefied by the vent condenser 9, eventually flowing back into the reactor. This process achieves material recycling and reduces evaporation losses. By installing the temperature transmitter T1 and the first pressure transmitter P1 on the water / gas material inlet 82, the temperature and pressure of the reactor 8 can be monitored in real time. The vent condenser 9 maintains pressure balance within the reactor, preventing pressure anomalies caused by gas accumulation. The drive motor 5 in this system is equipped with a frequency converter and connected to the controller. Since adding alkali to the reactor 8 generates heat, the temperature transmitter T1 automatically reduces the operating power of the drive motor 5 when it detects that the temperature exceeds the preset temperature.

[0022] To increase the reaction temperature inside the reactor 8, a first pipe 91 is connected to the first circulation port at the top of the reactor 8. The first pipe 91 is used to introduce steam into the reactor 8. A first steam control valve XV4, a first temperature control valve TV1, and a second pressure transmitter P2 are installed on the first pipe 91. All three valves are connected to a controller. The first temperature control valve TV1 regulates the steam flow rate according to the temperature, and the second pressure transmitter P2 detects the steam pressure.

[0023] To facilitate the setting of cooling water circulation and to cool down the reactor 8 when the temperature inside is too high, a second pipe 92 is connected to the first pipe 91, and the second pipe 92 is used for circulating water outlet. A third pipe 93 is connected to the second circulation port at the top of the reactor 8, and the third pipe 93 is used for circulating water outlet. Both the second pipe 92 and the third pipe 93 are connected to the circulating water system. A first circulating water outlet control valve XV5 is installed on the second pipe 92, and a second circulating water outlet control valve XV6 is installed on the third pipe 93. Both the first circulating water outlet control valve XV5 and the second circulating water outlet control valve XV6 are connected to a controller. During the normal cooling process, the first circulating water outlet control valve XV5 is always open. The second circulating water outlet control valve XV6 is only opened when rapid cooling is required.

[0024] To facilitate the circulation of cooling water, a fourth pipe 94 is connected to the third circulation port at the bottom of the reactor 8. This fourth pipe 94 is used for the intake of circulating water and is connected to the circulating water system. A first circulation water intake control valve XV7 is installed on the fourth pipe 94 and is connected to a controller. During normal cooling processes, the first circulation water intake control valve XV7 is always in the open state.

[0025] To facilitate the circulation of cooling water, a fifth pipe 95 and a sixth pipe 96 are connected in parallel on the fourth circulation port at the bottom of the reactor 8. The fifth pipe 95 is used for the intake of circulating water and is connected to the circulating water system; the sixth pipe 96 is used for the discharge of steam condensate.

[0026] The fifth pipe 95 is equipped with a second circulating water inlet control valve XV8 and a second temperature control valve TV2, and the sixth pipe 96 is equipped with a second steam control valve XV9. The second circulating water inlet control valve XV8, the second temperature control valve TV2, and the second steam control valve XV9 are all connected to a controller. The second circulating water inlet control valve XV8 is only opened when rapid cooling is required. The second temperature control valve TV2 is used to adjust the circulating water volume in the internal coil.

[0027] To facilitate feeding control, a pneumatic slide gate valve XV10 is connected between the outlet of the feeding pipe 6 and the inlet 81 of the reactor 8.

[0028] The working process and principle of this utility model:

[0029] First, check that the reactor is clean and free of water, and that all valves are in the correct position. (Open valves: Nitrogen control valve XV3; Close valves: Pneumatic slide gate valve XV10, first steam control valve XV4, first temperature control valve TV1, second temperature control valve TV2, first circulating water outlet control valve XV5, second circulating water outlet control valve XV6, first circulating water inlet control valve XV7, second circulating water inlet control valve XV8, second steam control valve XV9, and the discharge valve at the bottom of the reactor).

[0030] 2. Close the pH control valve XV2 and add a certain amount of process water to the water seal tank through the liquid level control valve XV1; after the preparation is completed, close the liquid level control valve XV1; when the system is running, control the pH value in the water seal tank 1 to be below 14. When the pH value reaches 14, discharge the alkaline solution into the reactor 8 and replace the process water.

[0031] 3. Turn on the blower 2 to maintain a slight negative pressure in the silo 3, and prepare a certain amount of caustic soda flakes in the silo 3.

[0032] IV. Evacuate a certain vacuum in reactor 8, and use nitrogen to adjust the pressure inside the reactor to a slight negative pressure through nitrogen control valve XV3.

[0033] 5. Transfer the material into the reactor 8 through the feeding pipe 6 and the spiral blade shaft 7, turn on the agitator inside the reactor, and adjust the stirring frequency to the process range;

[0034] VI. Temperature transmitter T1 monitors the temperature inside the reactor in real time. Under normal circumstances, the controller opens the first circulating water outlet control valve XV5 and the first circulating water inlet control valve XV7 to circulate the cooling water inside the reactor. Based on the temperature changes inside reactor 8, when the temperature transmitter T1 detects a rapid temperature rise, the controller will further open the second circulating water outlet control valve XV6 and the second circulating water inlet control valve XV8, and adjust the circulating water volume of the internal coil through the second temperature control valve TV2, and then gradually increase the amount of caustic soda flakes fed until the second temperature control valve TV2 is fully open.

[0035] In the description of this utility model, it should be understood that terms such as "center", "longitudinal", "lateral", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", "top", "one end", "one side", "both ends", "both sides", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model patent and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model patent, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or any direct application to other situations, fall within the protection scope of the present invention.

Claims

1. A diluent production continuous sheet caustic feeding system comprising a silo (3), characterized in that, A vibrating screen (4) is inclinedly arranged below the discharge port of the silo (3). The lower part of the vibrating screen (4) is connected to the inlet of the feeding pipe (6), and the outlet of the feeding pipe (6) is connected to the inlet (81) of the reactor (8). A spiral blade shaft (7) is rotatably connected in the feeding pipe (6), and one end of the spiral blade shaft (7) is fixedly connected to the drive shaft of the drive motor (5).

2. The diluent production continuous sheet caustic feeding system of claim 1, wherein, The upper air outlet of the silo (3) is connected to a fan (2), and the air outlet of the fan (2) is connected to the air inlet of the water seal trough (1).

3. The diluent production continuous sheet caustic feeding system of claim 2, wherein, The water seal tank (1) is equipped with a level gauge (L1) and a pH sensor (X1). The water inlet pipe of the water seal tank (1) is equipped with a level control valve (XV1) associated with the level gauge (L1). The water outlet pipe of the water seal tank (1) is equipped with a pH control valve (XV2) associated with the pH sensor (X1). The level gauge (L1), pH sensor (X1), level control valve (XV1), and pH control valve (XV2) are all connected to the controller. The water outlet pipe of the water seal tank (1) is connected to the water gas material port (82) of the reactor (8).

4. The diluent production continuous sheet caustic feeding system of claim 3, wherein, The water-gas material inlet (82) is connected to a vent condenser (9), a nitrogen control valve (XV3), a temperature transmitter (T1), and a first pressure transmitter (P1). The vent condenser (9), nitrogen control valve (XV3), temperature transmitter (T1), and first pressure transmitter (P1) are all connected to the controller.

5. The diluent production continuous sheet caustic feeding system of claim 1, wherein, A first pipe (91) is connected to the first circulation port at the top of the reactor (8). The first pipe (91) is used to introduce steam into the reactor (8). A first steam control valve (XV4), a first temperature control valve (TV1), and a second pressure transmitter (P2) are installed on the first pipe (91). The first steam control valve (XV4), the first temperature control valve (TV1), and the second pressure transmitter (P2) are all connected to a controller.

6. The diluent production continuous sheet caustic feeding system of claim 5, wherein, The first pipe (91) is connected to a second pipe (92), which is used for circulating water outlet; the second circulation port at the top of the reactor (8) is connected to a third pipe (93), which is used for circulating water outlet; both the second pipe (92) and the third pipe (93) are connected to the circulating water system; a first circulating water outlet control valve (XV5) is provided on the second pipe (92), and a second circulating water outlet control valve (XV6) is provided on the third pipe (93); both the first circulating water outlet control valve (XV5) and the second circulating water outlet control valve (XV6) are connected to a controller.

7. The diluent production continuous sheet caustic feeding system of claim 1, wherein, A fourth pipe (94) is connected to the third circulation port at the bottom of the reactor (8). The fourth pipe (94) is used for circulating water intake. The fourth pipe (94) is connected to the circulating water system. A first circulating water intake control valve (XV7) is installed on the fourth pipe (94). The first circulating water intake control valve (XV7) is connected to the controller.

8. The diluent production continuous sheet caustic feeding system of claim 1, wherein, A fifth pipe (95) and a sixth pipe (96) are connected in parallel on the fourth circulation port at the bottom of the reactor (8). The fifth pipe (95) is used for the intake of circulating water and is connected to the circulating water system. The sixth pipe (96) is used for the discharge of steam condensate.

9. The diluent production continuous sheet caustic feeding system of claim 8, wherein, The fifth pipe (95) is equipped with a second circulating water inlet control valve (XV8) and a second temperature control valve (TV2), and the sixth pipe (96) is equipped with a second steam control valve (XV9). The second circulating water inlet control valve (XV8), the second temperature control valve (TV2) and the second steam control valve (XV9) are all connected to the controller.

10. The diluent production continuous sheet caustic feeding system of claim 1, wherein, A pneumatic slide gate valve (XV10) is connected between the outlet of the feed pipe (6) and the inlet (81) of the reactor (8).

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