Safe liquid feeding device

Abstract

The utility model provides a safe liquid feeding device which comprises a reaction kettle, a liquid bin, a vacuum system, a micro-pressure nitrogen system, a flow meter, a nitrogen regulating valve and a pressure detector, the vacuum system is connected with the reaction kettle, and the micro-pressure nitrogen system is connected with the liquid bin through a nitrogen conveying pipe. A second sealing valve, a nitrogen adjusting valve and a first sealing valve are further sequentially arranged on the nitrogen conveying pipe in the direction from the micro-pressure nitrogen system to the liquid bin, and a pressure detector is further arranged on the liquid bin and connected with the nitrogen adjusting valve; a discharging pipe extending into the bottom of the liquid bin is further arranged on the liquid bin, the discharging pipe is connected with the reaction kettle through a connecting pipe, and a flow meter and a sight glass are further arranged on the connecting pipe. According to the device, the whole feeding process is closed, the liquid catalyst can be quantitatively fed at a constant speed, the risk of material leakage is avoided, and the field smell control is relatively good.

Description

Technical Field

[0001] The utility model relates to the field of chemical equipment, in particular to a safe liquid feeding device. Background Art

[0002] Some product production reactions require the addition of liquid catalysts. Currently, this involves opening the lid and inserting a suction tube into the catalyst drum to extract the material using a vacuum. However, this method of adding material has issues such as a strong odor, low safety, and is relatively cumbersome. Utility Model Content

[0003] In view of this, the utility model aims to propose a safe liquid feeding device, which makes the entire feeding process closed and can achieve the quantitative and constant speed feeding of liquid catalyst, without the risk of material leakage and better on-site odor control.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A safe liquid feeding device comprises a reactor, a liquid silo, a vacuum system, a micro-pressure nitrogen system, a flow meter, a nitrogen regulating valve, and a pressure detector. The vacuum system is connected to the reactor, and the micro-pressure nitrogen system is connected to the liquid silo via a nitrogen delivery pipe. The nitrogen delivery pipe is provided with a second sealing valve, a nitrogen regulating valve, and a first sealing valve in sequence in the direction from the micro-pressure nitrogen system to the liquid silo. The liquid silo is also provided with a pressure detector, which is connected to the nitrogen regulating valve. The liquid silo is also provided with a discharge pipe extending into the bottom of the liquid silo, which is connected to the reactor via a connecting pipe. The connecting pipe is also provided with a flow meter and a sight glass.

[0006] Furthermore, a discharge valve is provided on the discharge pipe, and the discharge pipe is connected to the connecting pipe through a first quick connector.

[0007] Furthermore, a nitrogen pipe is provided on the liquid silo, a first sealing valve is provided on the nitrogen pipe, and the nitrogen pipe is connected to the nitrogen delivery pipe through a second quick connector.

[0008] Furthermore, the liquid silo is also connected to a pressure gauge and a liquid level gauge.

[0009] Furthermore, a vacuum valve is provided on the pipeline connecting the vacuum system and the reactor.

[0010] Furthermore, the reactor is provided with a feeding port, a feeding valve is provided at the feeding port, and a connecting pipe is connected to the feeding valve.

[0011] Furthermore, a feeding pipe is provided on the liquid silo, and a stirring mechanism is provided inside the liquid silo, and the stirring mechanism is driven by a motor.

[0012] Furthermore, the stirring mechanism includes a stirring shaft, a stirring rod, an arc-shaped stirring blade, a connecting plate, a lower stirring blade and a scraper. The stirring shaft is vertically rotated and arranged inside the liquid silo. The top of the stirring shaft extends out of the top of the liquid silo and is connected to the motor. Several stirring rods are provided on the stirring shaft, and arc-shaped stirring blades are fixed on the stirring rods. A connecting plate is fixed to the bottom end of the stirring shaft, and several inclined lower stirring blades are evenly provided on the edge of the connecting plate. Several inclined scrapers are evenly provided on the lower surface of the connecting plate, and the scrapers are in contact with the bottom of the liquid silo.

[0013] Furthermore, it also includes a moving mechanism for placing the liquid silo, the moving mechanism includes a support seat, a handle, a fixed splint, a movable splint, a locking assembly and a moving wheel; a handle is provided on the upper surface of the support seat, and a moving wheel is provided on the lower surface of the support seat. The fixed splint and the movable splint are both semicircular arc-shaped, the fixed splint is vertically fixed on the upper surface of the support seat, one side of the movable splint is hinged to one side of the fixed splint, the fixed splint and the movable splint together form a cylindrical structure for clamping the liquid silo, and the fixed splint and the movable splint are cooperated with each other and provided with a locking assembly.

[0014] Furthermore, the locking assembly includes a screw, an L-shaped clip and a fastening nut; the screw is hinged on the side wall of the movable splint, the L-shaped clip is fixed on the side wall of the fixed splint, the screw is rotated to clamp it in the L-shaped clip, and the fastening nut is threaded on the screw.

[0015] Compared with the prior art, the safe liquid feeding device described in the present invention has the following advantages:

[0016] The safe liquid feeding device described in the utility model includes a reactor, a liquid silo, a vacuum system, a micro-pressure nitrogen system, a flowmeter, a nitrogen regulating valve, and a pressure detector. The vacuum system is used to create a vacuum environment for the reactor, the micro-pressure nitrogen system is used to regulate and maintain the pressure in the liquid silo, and the nitrogen regulating valve and pressure detector are used to adjust and monitor the pressure in the liquid silo. The vacuum and micro-pressure nitrogen systems slowly pump the liquid into the reactor, and the sight glass on the connecting pipe is monitored during the pumping process. This device makes the entire feeding process airtight and can achieve a quantitative and constant rate of liquid catalyst feeding without the risk of material leakage, and better on-site odor control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of the safe liquid feeding device according to an embodiment of the present utility model;

[0019] Figure 2This is a structural diagram of the liquid silo according to an embodiment of the present utility model;

[0020] Figure 3 This is a three-dimensional diagram of a liquid silo according to an embodiment of the present utility model;

[0021] Figure 4 This is a partial enlarged view of point A of the liquid silo according to an embodiment of the present utility model;

[0022] Figure 5 This is a diagram of the internal structure of the liquid silo described in an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 1. Reactor; 11. Vacuum valve; 12. Feed valve; 2. Liquid silo; 21. Discharge pipe; 211. Discharge valve; 212. First quick connector; 22. Nitrogen pipe; 221. First sealing valve; 222. Second quick connector; 23. Feed pipe; 24. Motor; 25. Stirring mechanism; 251. Stirring shaft; 252. Stirring rod; 253. Curved stirring blade; 254. Connecting plate; 255. Lower stirring blade; 256 , scraper; 26, pressure gauge; 27, pressure detector; 28, liquid level gauge; 3, vacuum system; 4, micro-pressure nitrogen system; 41, second sealing valve; 5, connecting pipe; 51, sight glass; 6, flow meter; 7, nitrogen regulating valve; 8, moving mechanism; 81, support seat; 82, handle; 83, fixed splint; 84, movable splint; 85, locking assembly; 851, screw; 852, L-shaped clamp; 853, fastening nut; 86, moving wheel. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] A safe liquid feeding device includes a reactor 1, a liquid silo 2, a vacuum system 3, a micro-pressure nitrogen system 4, a flowmeter 6, a nitrogen regulating valve 7, and a pressure detector 27. The vacuum system 3 is connected to the reactor 1, and the micro-pressure nitrogen system 4 is connected to the liquid silo 2 via a nitrogen delivery pipe. The nitrogen delivery pipe is also provided with a second sealing valve 41, a nitrogen regulating valve 7, and a first sealing valve 221 in the direction from the micro-pressure nitrogen system 4 to the liquid silo 2. The liquid silo 2 is also provided with a pressure detector 27, which is connected to the nitrogen regulating valve 7. The liquid silo 2 is also provided with a discharge pipe 21 extending into the bottom of the liquid silo 2. The discharge pipe 21 is connected to the reactor 1 via a connecting pipe 5. The connecting pipe 5 is also provided with a flowmeter 6 and a sight glass 51.

[0030] The vacuum system creates a vacuum environment for the reactor, while the low-pressure nitrogen system regulates and maintains pressure within the liquid silo. A nitrogen regulating valve and pressure detector are used to adjust and monitor pressure within the silo. The vacuum and low-pressure nitrogen systems slowly pump the liquid into the reactor, with an eye on the sight glass on the connecting pipe. This device ensures a sealed feeding process, enabling the precise and constant addition of liquid catalyst without the risk of leakage and providing excellent on-site odor control.

[0031] Exemplarily, a discharge valve 211 is further provided on the discharge pipe 21 , and the discharge pipe 21 is connected to the connecting pipe 5 via a first quick connector 212 .

[0032] Illustratively, a nitrogen pipe 22 is provided on the liquid silo 2 , a first sealing valve 221 is provided on the nitrogen pipe 22 , and the nitrogen pipe 22 is connected to the nitrogen delivery pipe via a second quick connector 222 .

[0033] The setting of the quick connector can facilitate the connection of the pipeline, thereby making it easy to remove or install the liquid silo.

[0034] Exemplarily, the liquid silo 2 is further connected to a pressure gauge 26 and a liquid level gauge 28 .

[0035] Exemplarily, a vacuum valve 11 is further provided on the pipeline connecting the vacuum system 3 and the reactor 1 .

[0036] Exemplarily, the reactor 1 is provided with a feeding port, a feeding valve is provided at the feeding port, and the connecting pipe 5 is connected to the feeding valve.

[0037] Exemplarily, a feeding pipe 23 is further provided on the liquid silo 2 , and a stirring mechanism 25 is provided inside the liquid silo 2 , and the stirring mechanism 25 is driven by a motor 24 .

[0038] Specifically, the stirring mechanism 25 includes a stirring shaft 251, a stirring rod 252, an arc-shaped stirring blade 253, a connecting plate 254, a lower stirring blade 255 and a scraper 256. The stirring shaft 251 is vertically rotated and arranged inside the liquid silo 2. The top of the stirring shaft 251 extends out of the top of the liquid silo 2 and is connected to the motor 24. A plurality of stirring rods 252 are provided on the stirring shaft 251. The stirring rods 252 are fixed with an arc-shaped stirring blade 253. The bottom end of the stirring shaft 251 is fixed with a connecting plate 254. The edge of the connecting plate 254 is evenly provided with a plurality of inclined lower stirring blades 255. The lower surface of the connecting plate 254 is evenly provided with a plurality of inclined scrapers 256. The scraper 256 is in contact with the bottom of the liquid silo 2.

[0039] The stirring mechanism can stir the liquid in the liquid silo to prevent precipitation.

[0040] Exemplarily, it also includes a moving mechanism 8 for placing the liquid silo 2, and the moving mechanism 8 includes a support seat 81, a handle 82, a fixed splint 83, a movable splint 84, a locking assembly 85 and a moving wheel 86; the upper surface of the support seat 81 is provided with a handle 82, and the lower surface of the support seat 81 is provided with a moving wheel 86, the fixed splint 83 and the movable splint 84 are both semicircular, the fixed splint 83 is vertically fixed on the upper surface of the support seat 81, and one side of the movable splint 84 is hinged to one side of the fixed splint 83, and the fixed splint 83 and the movable splint 84 together form a cylindrical structure for clamping the liquid silo 2, and the fixed splint 83 and the movable splint 84 are cooperated with a locking assembly 85.

[0041] Specifically, locking assembly 85 includes a screw 851, an L-shaped clamp 852, and a fastening nut 853. Screw 851 is hinged to the side wall of movable clamp 84, and L-shaped clamp 852 is fixed to the side wall of fixed clamp 83. Screw 851 is rotated to lock it within L-shaped clamp 852. Fastening nut 853 is threaded onto screw 851. More specifically, the L-shaped clamp and the side wall of fixed clamp 83 form a U-shaped structure with the opening facing upward.

[0042] The moving mechanism can facilitate the movement of the liquid silo, and the fixed splint and the movable splint play a role in fixing the liquid silo to prevent the liquid silo from tipping over.

[0043] In the figure, PI stands for Pressure Indicating Instrument in PID, such as pressure detector 27. Its function is to measure pressure and transmit the data to the control room or other remote display device so that operators can remotely monitor pressure changes. PG usually refers to a field-installed pressure gauge, such as pressure gauge 26, which is used to measure and display the pressure conditions on site.

[0044] The workflow is:

[0045] After the normal reaction of reactor 1 begins, the reaction process is negative pressure inside the reactor. The liquid silo 2 is connected to the reactor feed port through the first quick connector and the connecting pipe. At the same time, the nitrogen sealing system is connected to the liquid silo. Open the second sealing valve, and the nitrogen regulating valve automatically adjusts the nitrogen flow to ensure that the pressure in the liquid silo is less than 0.05Mpa. The nitrogen regulating valve is interlocked with the liquid silo pressure. The pressure gauge and pressure detector can measure the pressure. When the pressure reaches 0.05Mpa, the nitrogen regulating valve is in the fully closed state. Slowly open the liquid silo discharge valve and wait for the vacuum and nitrogen sealing system pressure to slowly pump the liquid into the reactor. Pay attention to the sight glass on the connecting pipe during the extraction process. After the extraction is completed, close the second sealing valve first. When the pressure in the liquid silo is less than 0, close the discharge valve. After closing the first sealing valve and the feed valve, the liquid silo can be removed for a new round of material preparation.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safe liquid feeding device, characterized in that: It includes a reactor, a liquid silo, a vacuum system, a micro-pressure nitrogen system, a flow meter, a nitrogen regulating valve, and a pressure detector. The vacuum system is connected to the reactor, and the micro-pressure nitrogen system is connected to the liquid silo through a nitrogen delivery pipe. The nitrogen delivery pipe is also provided with a second sealing valve, a nitrogen regulating valve, and a first sealing valve in the direction from the micro-pressure nitrogen system to the liquid silo. The liquid silo is also provided with a pressure detector, which is connected to the nitrogen regulating valve; the liquid silo is also provided with a discharge pipe extending into the bottom of the liquid silo, which is connected to the reactor through a connecting pipe, and the connecting pipe is also provided with a flow meter and a sight glass.

2. The safe liquid feeding device according to claim 1, characterized in that: A discharge valve is also provided on the discharge pipe, and the discharge pipe is connected to the connecting pipe through a first quick connector.

3. The safe liquid feeding device according to claim 1, characterized in that: A nitrogen pipe is provided on the liquid silo, a first sealing valve is arranged on the nitrogen pipe, and the nitrogen pipe is connected to the nitrogen delivery pipe through a second quick connector.

4. The safe liquid feeding device according to claim 1, characterized in that: The liquid silo is also connected to a pressure gauge and a liquid level gauge.

5. The safe liquid feeding device according to claim 1, characterized in that: A vacuum valve is also provided on the pipeline connecting the vacuum system and the reactor.

6. The safe liquid feeding device according to claim 1, characterized in that: The reactor is provided with a feeding port, a feeding valve is provided at the feeding port, and a connecting pipe is connected to the feeding valve.

7. The safe liquid feeding device according to claim 1, characterized in that: A feeding pipe is also provided on the liquid silo, and a stirring mechanism is provided inside the liquid silo, and the stirring mechanism is driven by a motor.

8. The safe liquid feeding device according to claim 7, characterized in that: The stirring mechanism includes a stirring shaft, a stirring rod, an arc-shaped stirring blade, a connecting plate, a lower stirring blade and a scraper. The stirring shaft is vertically rotated and arranged inside the liquid silo. The top of the stirring shaft extends out of the top of the liquid silo and is connected to the motor. Several stirring rods are provided on the stirring shaft, and arc-shaped stirring blades are fixed on the stirring rods. A connecting plate is fixed to the bottom end of the stirring shaft, and several inclined lower stirring blades are evenly arranged on the edge of the connecting plate. Several inclined scrapers are evenly arranged on the lower surface of the connecting plate, and the scrapers are in contact with the bottom of the liquid silo.

9. The safe liquid feeding device according to claim 1, characterized in that: It also includes a moving mechanism for placing the liquid silo, the moving mechanism includes a support seat, a handle, a fixed splint, a movable splint, a locking assembly and a moving wheel; a handle is provided on the upper surface of the support seat, and a moving wheel is provided on the lower surface of the support seat. The fixed splint and the movable splint are both semicircular arc-shaped, the fixed splint is vertically fixed on the upper surface of the support seat, one side of the movable splint is hinged to one side of the fixed splint, the fixed splint and the movable splint together form a cylindrical structure for clamping the liquid silo, and a locking assembly is provided on the fixed splint and the movable splint.

10. The safe liquid feeding device according to claim 9, characterized in that: The locking assembly includes a screw, an L-shaped clip and a fastening nut; the screw is hinged on the side wall of the movable splint, the L-shaped clip is fixed on the side wall of the fixed splint, and the screw is rotated to clamp it in the L-shaped clip, and the fastening nut is threaded on the screw.

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