Air-isolated stirring and dissolving device and solution preparing and transferring device

Abstract

The utility model belongs to the field of dissolving devices, and particularly relates to an air-isolated stirring dissolving device and a solution preparing and transferring device. The air-isolated stirring and dissolving device comprises a sealable dissolving kettle, the dissolving kettle is provided with a dissolving cavity, the dissolving kettle is provided with a stirring device and a vacuumizing opening, the dissolving kettle is connected with a feeding device, the feeding device comprises a sealable feeding bin and a feeding pipeline connected with the feeding bin and the dissolving cavity, and the sealable feeding bin is connected with the vacuumizing opening through the feeding pipeline. A feeding valve is arranged on the feeding pipeline, and an evacuation pipeline is further connected between the feeding bin and the dissolving cavity. The feeding pipeline and the vacuumizing pipeline are arranged between the feeding bin and the dissolving cavity at the same time, and the dissolving cavity and the feeding bin are vacuumized at the same time, so that air is prevented from being brought into the dissolving cavity in the feeding process. Meanwhile, the space of the feeding bin is communicated with the space of the dissolving cavity through the evacuation pipeline, air in the communicated space is evacuated through one-time vacuumizing, and the vacuumizing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of dissolution devices, and particularly relates to an air-insulated stirring dissolution device and a solution preparation and transfer device. Background Art

[0002] Some oilfield working fluids are formed by mixing solid or liquid substances to be dissolved with specific solvents. Such specific solvents include oilfield injection water, formation water, fresh sulfur-containing water, etc. In order to maintain their original state, it is necessary to isolate air during the preparation of relevant solutions to prevent the oxygen in the air from changing their properties and ionic components. The preparation process of the above solutions often requires constant-speed stirring for a long time, and the resulting solutions often have a high viscosity. After the solution is prepared, it needs to be transferred under air isolation.

[0003] The solution preparation process under air isolation is carried out in a vacuum dissolution device. The Chinese utility model patent with the publication date of November 16, 2016 and the publication number of CN205683889U discloses a high-efficiency vacuum mixer for solid-liquid dissolution and mixing, which includes a dissolution kettle with a stirring cavity (equivalent to a dissolution cavity). A stirring device is arranged on the dissolution kettle, and the stirring device includes a rotating motor and mechanical stirring components such as a bracket connected to the rotating motor. A vacuum extraction port is also arranged on the dissolution kettle, and the vacuum extraction port is connected to a vacuum extraction pump body to evacuate the dissolution cavity; a feed hopper (feeding device) is also installed on the top of the dissolution kettle. When the vacuum dissolution device performs vacuum dissolution operation, the substance to be dissolved is fed from the feed hopper into the dissolution cavity, and the dissolution process is ensured to be carried out under air isolation by evacuating the dissolution cavity.

[0004] In the actual dissolution process, the feeding process of the substance to be dissolved often needs to last for a certain period of time. Using the feeding method of the existing technology is likely to introduce air in the feeding device into the dissolution cavity, which will have an adverse impact on the solution preparation process that needs to be carried out under air isolation conditions. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an air-insulated stirring dissolution device to solve the problem that the existing device is likely to introduce air into the dissolution cavity during the feeding process.

[0006] The second purpose of the utility model is to provide an air-insulated solution preparation and transfer device to realize the preparation and transfer of the solution under air isolation.

[0007] In order to achieve the above first purpose, the technical solution adopted by the utility model is:

[0008] An air-insulated stirring and dissolving device, comprising a sealable dissolving kettle, the dissolving kettle having a dissolving cavity, the dissolving kettle being provided with a stirring device and a vacuum extraction port, the dissolving kettle being connected with a feeding device, the feeding device comprising a sealable feeding bin and a feeding pipeline connecting the feeding bin and the dissolving cavity, a feeding valve being arranged on the feeding pipeline, and an evacuation pipeline for evacuating the air in the feeding bin when the dissolving cavity is evacuated is further connected between the feeding bin and the dissolving cavity.

[0009] The air-insulated stirring and dissolving device provided by the utility model simultaneously arranges a feeding pipeline and an evacuation pipeline between the feeding bin and the dissolving cavity, evacuates the dissolving cavity and the feeding bin simultaneously, and avoids bringing air into the dissolving cavity during the feeding process. At the same time, the evacuation pipeline connects the space of the feeding bin and the space of the dissolving cavity, and evacuates the air in the connected space by one-time vacuum extraction, improving the vacuum extraction efficiency.

[0010] Preferably, the feeding bin is arranged above the dissolving kettle, the feeding pipeline is a straight pipe, the evacuation pipeline is a bent pipe, and the bent pipe comprises a vertical pipe section connected to the dissolving kettle and an inclined pipe section connecting the vertical pipe section and the feeding bin.

[0011] More preferably, the bin body of the feeding bin is a conical bin body with a larger upper part and a smaller lower part, and the inclined pipe section is connected to the upper part of the conical bin body.

[0012] Preferably, a solvent inlet is arranged on the dissolving kettle, and the solvent inlet is connected with a flowmeter for measuring the solvent entering the dissolving cavity.

[0013] Preferably, the sealable dissolving kettle comprises a kettle body with an upper opening and a sealing cover for sealing the kettle body, the stirring device comprises a motor, a stirring rod and stirring blades, and the stirring rod is hermetically connected to the dissolving kettle through a sealing bearing arranged on the sealing cover.

[0014] In order to achieve the above second object, the technical solution adopted by the utility model is:

[0015] An air-insulated solution preparation and transfer device, comprising an air-insulated stirring and dissolving device and a solution transfer device, the air-insulated stirring and dissolving device comprising a sealable dissolving kettle, the dissolving kettle having a dissolving cavity, the dissolving kettle being provided with a stirring device and a vacuum extraction port, the dissolving kettle being connected with a feeding device, the feeding device comprising a sealable feeding bin and a feeding pipeline connecting the feeding bin and the dissolving cavity, a feeding valve being arranged on the feeding pipeline, and an evacuation pipeline for evacuating the air in the feeding bin when the dissolving cavity is evacuated is further connected between the feeding bin and the dissolving cavity; the dissolving kettle is provided with a solution outlet for discharging the solution obtained after dissolution, and the solution transfer device comprises a vacuum container connected to the solution outlet.

[0016] The air-insulating solution preparation and transfer device of the present utility model, after the solution preparation is completed, connects the solution outlet of the dissolution kettle to a vacuum container, and relies on the gravity of the solution to transfer the solution to the vacuum container, realizing the transfer of the solution under air-insulated conditions. Since the solution preparation process is also carried out under air-insulated conditions, this ensures that the entire process of solution preparation and transfer is carried out while avoiding contact with air, thereby ensuring that the solution of the substance to be dissolved will not deteriorate due to contact with air.

[0017] Preferably, the vacuum extraction port is connected with a vacuum control valve, and the solution transfer device further includes a pressurized gas storage device connected to the vacuum extraction port.

[0018] More preferably, the vacuum container is further connected with an inert gas storage device.

[0019] Preferably, a solvent inlet is provided on the dissolution kettle, and the solvent inlet is connected with a compressible storage container for containing the solvent. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of the air-insulating stirring and dissolving device of the present utility model;

[0021] Figure 2 is a structural schematic diagram of the air-insulating solution preparation and transfer device of the present utility model;

[0022] Wherein, 1 - dissolution kettle; 2 - stirring device; 3 - vacuum extraction port; 4 - dissolution cavity; 5 - kettle body; 6 - sealing cover; 7 - hose; 8 - first vacuum pump; 80 - vacuum control valve; 9 - feeding device; 10 - feeding bin; 100 - bin body; 101 - bin body sealing cover; 11 - feeding pipeline; 12 - vacuum extraction pipeline; 120 - vertical pipe section; 121 - inclined pipe section; 13 - constant speed motor; 14 - stirring shaft; 15 - stirring blades; 16 - sealed bearing; 17 - solvent inlet; 18 - solution outlet; 19 - flowmeter; 20 - solvent inlet control valve; 21 - solution outlet control valve; 22 - solution storage container; 220 - first control valve; 221 - second control valve; 222 - third control valve; 223 - fourth control valve; 23 - second vacuum pump; 24 - inert gas storage device; 25 - compressible storage container; 250 - fifth control valve. Detailed Embodiments

[0023] The utility model relates to a device that needs to remove air in the system and uses mechanical stirring to prepare a solution in an air-insulated state, and is particularly suitable for preparing solutions that need to avoid the large impact of oxygen on the solvent and have a high viscosity. Considering that the feeding process needs to last for a period of time, the existing vacuum stirring and dissolving device is likely to introduce some air into the dissolving cavity during feeding, and cannot achieve true air-insulated stirring and dissolving. Further, after introducing air into the dissolving cavity, a vacuum pumping device needs to continuously pump vacuum to re-extract the introduced air. If the feeding time is long, it will also increase the working duration of the vacuum pumping device and increase the energy consumption of solution preparation.

[0024] The technical concept of the utility model is to set an evacuation pipeline as a communication bypass while setting a feeding pipeline between the feeding bin and the dissolving kettle. After adding the to-be-dissolved substance required to the feeding bin and sealing the feeding bin, the system is evacuated. At this time, after evacuating the air in the dissolving cavity and the feeding bin at the same time, the vacuum pumping is stopped, and the system is in an air-insulated state. After the solvent is sucked in by vacuum, the to-be-dissolved substance slowly flows or falls into the solvent under its own weight, and then mechanical stirring is used until the to-be-dissolved substance is fully dissolved or meets the use requirements. The air introduction that may be caused during the feeding process is avoided in the solution preparation process, vacuum feeding is realized, and continuous vacuum pumping is not required during the feeding process, reducing the energy consumption in the solution preparation process.

[0025] When the to-be-dissolved substance is a polymer, its dissolution time is generally long and the solution formed after dissolution has a high viscosity. The utility model also configures a solution transfer device to realize the air-insulated transfer after the solution preparation is completed, and maximally avoids the air that may be introduced during the solution transfer process, thereby ensuring that the solution preparation and transfer are carried out under the condition of avoiding contact with air. The solution transfer device is connected to the solution outlet of the dissolving kettle by using a vacuum container, so that the prepared solution flows into the vacuum container under the action of gravity. When the viscosity of the prepared solution is too high, the fluidity is poor or there are special requirements, gas that meets the requirements can be further introduced into the dissolving cavity to increase the pressure, and the solution is smoothly transferred through the internal and external pressure difference.

[0026] The implementation process of the utility model will be described in detail below with reference to the drawings and specific embodiments.

[0027] Embodiment 1

[0028] The air-insulated stirring and dissolving device of this embodiment, as Figure 1 shown, includes a sealable dissolving kettle 1 with a dissolving cavity, and a stirring device 2 and a vacuum pumping port 3 are provided on the sealable dissolving kettle.

[0029] The dissolution chamber 4 in the dissolution kettle 1 is a place for preparing a solution of the substance to be dissolved and the solvent. "Airtight" means that after the valves, kettle lids, etc. on the dissolution kettle 1 are closed, the dissolution chamber 4 is in an airtight environment, which can meet the requirement of maintaining the vacuum condition after evacuation. The stirring device 2 provided on the dissolution kettle 1 is mainly used to stir the liquid in the dissolution chamber 4, promoting the continuous dissolution of the substance to be dissolved into the solvent and finally forming a solution. The evacuation port 3 is used to evacuate the dissolution chamber 4 to make the dissolution chamber 4 in a condition of being isolated from air.

[0030] The dissolution kettle 1 includes a kettle body 5 with an open upper part and a sealing cover 6 for sealing the kettle body 5. A rubber sealing strip can be fixed on the sealing cover 6. After the sealing cover 6 is covered on the kettle body 5, the rubber sealing strip is used to achieve the seal between the sealing cover 6 and the opening of the kettle body 5. The evacuation port 3 is arranged on the sealing cover 6. After the evacuation port 3 is connected to the first vacuum pump 8 through a hose 7, the first vacuum pump 8 can be used to evacuate the dissolution chamber 4 of the dissolution kettle 1. An evacuation control valve 80 is connected to the evacuation port 3 to control the connection or disconnection between the dissolution chamber 4 and the first vacuum pump 8.

[0031] A feeding device 9 is connected to the sealing cover 6. The feeding device 9 is used to add the substance to be dissolved into the dissolution chamber 4. The feeding device 9 includes a feeding bin 10. The feeding bin 10 is communicated with the dissolution chamber 4 through a feeding pipeline 11. A feeding valve is arranged on the feeding pipeline 11. An evacuation pipeline 12 is also connected between the feeding bin 10 and the dissolution chamber 4. The evacuation pipeline 12 communicates the feeding bin 10 with the dissolution chamber 4. In this way, when evacuating the dissolution chamber 4, since the feeding bin 10 is communicated with the dissolution chamber 4, the feeding bin 10 is also evacuated simultaneously.

[0032] The feeding bin 10 is an airtight bin body structure, including an upper open bin body 100 and a bin body sealing cover 101. A rubber sealing strip is provided on the bin body sealing cover 101. After the bin body sealing cover 101 is covered on the bin body, the rubber sealing strip on the bin body sealing cover 101 realizes the sealed connection with the opening of the bin body, thus ensuring the airtightness of the feeding bin 10 during evacuation.

[0033] The feeding bin 10 is arranged above the sealing cover 6, which facilitates the falling (for solid substances to be dissolved) or flowing (for liquid substances to be dissolved) of the substances to be dissolved into the dissolution chamber 4 below under their own weight. The body of the feeding bin 10 is a conical bin body with a larger upper part and a smaller lower part. The bottom of the conical bin body is connected to the feeding pipeline 11, and the feeding pipeline 11 is in the form of a straight pipe. The evacuation pipeline 12 connected between the feeding bin 10 and the dissolution chamber 4 is a bent pipe, including a riser section 120 connected to the sealing cover 6 and an inclined pipe section 121 connecting the riser section 120 and the feeding bin 10. The inclined pipe section 121 is connected to the upper part of the bin body 100 of the feeding bin. Since the evacuation pipeline 12 is in communication with the bin body 100 of the feeding bin, to prevent the substances to be dissolved from directly entering the dissolution chamber 4 through the evacuation pipeline 12, the feeding position of the substances to be dissolved in the bin body 100 of the feeding bin should not be higher than the connection position of the evacuation pipeline 12 on the bin body 100 of the feeding bin. With the above forms of the bin body, feeding pipeline, and evacuation pipeline, the feeding process of the substances to be dissolved is easy to achieve, and the conical structure design helps to quickly evacuate the air in the bin body 100 of the feeding bin, improving the vacuum evacuation efficiency.

[0034] In other implementation cases, the shape of the bin body 100 of the feeding bin can be other shapes. For example, the bin body includes a cylindrical section and a conical section connected to the lower part of the cylindrical section, and the feeding pipeline 11 is connected to the bottom of the conical section. An evacuation pipeline 12 is arranged between the upper end of the cylindrical section and the dissolution chamber. The evacuation pipeline can be in any shape that can evacuate the air in the feeding bin 10. For example, it can adopt a combination form of a horizontal pipe section and a vertical pipe section. The inlet of the horizontal pipe section is connected to the bin body 100 of the feeding bin, and the outlet of the vertical pipe section is connected to the sealing cover 6.

[0035] A stirring device 2 is arranged on the dissolution kettle 1. The stirring device 2 includes a constant-speed motor 13, a stirring shaft 14 connected to the output end of the constant-speed motor 13, and stirring blades 15 connected to the stirring shaft 14. The stirring shaft 14 is hermetically connected to a sealing bearing 16 arranged on the sealing cover 6 to achieve the airtightness of the stirring process. When preparing the solution, the liquid is continuously stirred by the stirring device 2 to promote the dissolution of the substances to be dissolved until a solution meeting the requirements is obtained.

[0036] A solvent inlet 17 and a solution outlet 18 are arranged at the lower end of the body 5 of the dissolution kettle. Solvent is introduced into the dissolution chamber 4 through the solvent inlet 17. After the solution preparation is completed, the prepared solution is discharged through the solution outlet 18. A flow meter 19 and a solvent inlet control valve 20 are connected to the solvent inlet 17. The flow meter 19 measures the solvent entering the dissolution chamber 4, and the solvent inlet control valve 20 controls the opening and closing of the solvent inlet. Since the substances to be dissolved added into the feeding bin 10 are also measured, a solution with a specific concentration can be obtained after all the substances to be dissolved are dissolved in the solvent. A solution outlet control valve 21 is connected to the solution outlet 18.

[0037] The process of preparing the solution of the present utility model is as follows: Fasten the sealing cover 6 and the dissolving kettle body 5, close the feeding valve on the feeding pipeline 11, pour the weighed substance to be dissolved into the feeding bin body 100, and fasten the bin body sealing cover 101. Close the solvent inlet control valve 20 and the solution outlet control valve 21, start the first vacuum pump 8, open the evacuation control valve 80 to fully evacuate the air in the system. After the air in the system is exhausted, close the evacuation control valve 80, and slowly open the solvent inlet control valve 20. The solvent in the solvent storage tank connected to the solvent inlet slowly enters the dissolving cavity under the action of vacuum, and the flowmeter 19 is used for measurement during this period. After the specific solvent entering the dissolving cavity reaches the required amount, close the solvent inlet control valve 20. Start the constant speed motor 13, set the rotation speed as required, so that the specific solvent forms a vortex under the action of the stirring blades 15. Slowly open the feeding valve, so that the substance to be dissolved slowly flows or falls into the solvent under the action of gravity. Keep the constant speed motor 13 driving the stirring blades 15 running continuously until the substance to be dissolved is fully dissolved or meets the usage requirements. Close the constant speed motor 13 to stop mechanical stirring, and the solution preparation is completed.

[0038] Using the air-insulated stirring and dissolving device of this embodiment, the dissolving cavity 4 and the feeding bin 10 are connected as a whole for vacuum pumping. The substance to be dissolved in the feeding bin 10 is fed under vacuum, avoiding bringing air into the dissolving cavity during feeding, and ensuring the effectiveness of the solution preparation process.

[0039] Embodiment 2

[0040] The air-insulated solution preparation and transfer device of the present utility model, as Figure 2 shown, includes an air-insulated stirring and dissolving device and a solution transfer device. The air-insulated stirring and dissolving device is the same as that in Embodiment 1 and will not be elaborated here.

[0041] The solution transfer device is used to transfer the prepared solution from the air-insulated stirring and dissolving device to other containers under air-insulated conditions. The solution transfer device includes a solution storage container 22, which is used to receive the solution prepared in the dissolving kettle 1. A first control valve 220 is provided on the connecting pipeline between the solution storage container 22 and the solution outlet 18 of the dissolving kettle 1. The solution storage container 22 is also connected with a second vacuum pump 23 and an inert gas storage device 24. A second control valve 221 is provided on the connecting pipeline between the solution storage container 22 and the second vacuum pump 23, and a third control valve 222 is provided on the connecting pipeline between the solution storage container 22 and the inert gas storage device 24. The second vacuum pump 23 evacuates the solution before it enters the solution storage container 22 to make it a vacuum container. The inert gas storage device 24 fills the solution storage container 22 with inert gas after the solution completely enters the solution storage container 22, playing a protective role for the prepared solution.

[0042] Figure 2 In this case, the inlet of the solution storage container 22 is connected to one interface of a four-way connector. The other three interfaces of the four-way connector are respectively connected to the solution outlet 18 of the dissolution kettle 1, the second vacuum pump 23, and the inert gas storage device 24. A fourth control valve 223 is further provided at the outlet of the solution storage container 22. The inert gas storage device 24 is specifically an inert gas bag.

[0043] The solvent inlet 17 of the dissolution kettle 1 is connected to a solvent storage device through a solvent feed pipeline. The solvent storage device contains the solvent used for preparing the solution, and a fifth control valve 250 is provided on the solvent feed pipeline.

[0044] In this embodiment, the solvent storage device adopts a soft and compressible storage container 25. After the air in the dissolution kettle is evacuated, the control valve 20 is opened, and the solvent in the water storage container can flow into the dissolution kettle 1 under the action of atmospheric pressure (or further applying an external force). The flowmeter 19 is used to measure the amount of solvent injected into the dissolution kettle.

[0045] The working process of the air-insulated solution preparation and transfer device in this embodiment is as follows: After the solution is prepared in the manner of Embodiment 1 and ready for solution transfer, at this time, first close the solution outlet control valve 21, the third control valve 222, and the fourth control valve 223, open the first control valve 220 and the second control valve 221 and perform vacuum pumping to evacuate the gas in the solution storage container 22; close the second control valve 221, open the solution outlet control valve 21, and make the prepared solution flow into the solution storage tank under the action of gravity; in other implementation cases, when the viscosity of the prepared solution is too high and the fluidity is poor, close the evacuation control valve 80, disconnect the connection between the evacuation port 3 of the dissolution kettle body 5 and the first vacuum pump 8, connect the evacuation port 3 to a pressurized gas storage device, such as a nitrogen bag or other inert gas bag, slowly open the evacuation control valve 80, and increase the system pressure by squeezing the inert gas bag, and achieve the smooth transfer of the solution into the vacuum container through the internal and external pressure difference.

[0046] After the solution completely enters the solution storage container 22, close the first control valve 220 and open the third control valve 222 to make the inert gas in the inert gas storage device 24 enter the solution storage container 22 to protect the prepared solution. After the transfer is completed, the solution storage container 22 can be removed to facilitate the use or detection of the solution, etc.

Claims

1. An air-insulated stirring and dissolving device, comprising a sealable dissolving kettle, the dissolving kettle having a dissolving chamber, the dissolving kettle being provided with a stirring device and a vacuum port, characterized in that: The dissolving kettle is connected with a feeding device, which includes a sealable feeding bin and a feeding pipeline connecting the feeding bin and the dissolving chamber, a feeding valve is arranged on the feeding pipeline, and an evacuation pipeline is also connected between the feeding bin and the dissolving chamber for evacuating the air in the feeding bin when the dissolving chamber is evacuated.

2. The air-insulated stirring and dissolving device according to claim 1, characterized in that: The feeding bin is arranged above the dissolving kettle, the feeding pipeline is a straight pipe, the evacuation pipeline is a curved pipe, and the curved pipe includes a vertical pipe section connected to the dissolving kettle and an inclined pipe section connecting the vertical pipe section and the feeding bin.

3. The air-insulated stirring and dissolving device according to claim 2, characterized in that: The silo body of the feeding silo is a conical silo body that is larger at the top and smaller at the bottom, and the inclined pipe section is connected to the upper part of the conical silo body.

4. The air-insulated stirring and dissolving device according to claim 1, characterized in that: The dissolving kettle is provided with a solvent inlet, and the solvent inlet is connected to a flow meter for measuring the solvent entering the dissolving chamber.

5. The air-insulated stirring and dissolving device according to claim 1, characterized in that: The sealable dissolving kettle comprises a kettle body with an upper opening and a sealing cover that seals the kettle body. The stirring device comprises a motor, a stirring rod and a stirring blade. The stirring rod is sealed and connected to the dissolving kettle via a sealing bearing arranged on the sealing cover.

6. An air-isolated solution preparation and transfer device, characterized in that: It comprises an air-isolated stirring and dissolving device and a solution transfer device, wherein the air-isolated stirring and dissolving device comprises a sealable dissolving kettle, the dissolving kettle has a dissolving chamber, the dissolving kettle is provided with a stirring device and a vacuum port, the dissolving kettle is connected with a feeding device, the feeding device comprises a sealable feeding bin and a feeding pipeline connecting the feeding bin and the dissolving chamber, the feeding pipeline is provided with a feeding valve, and an evacuation pipeline for evacuating the air in the feeding bin when the dissolving chamber is evacuated is also connected between the feeding bin and the dissolving chamber; the dissolving kettle is provided with a solution outlet for discharging the solution obtained after dissolution, and the solution transfer device comprises a vacuum container connected with the solution outlet.

7. The air-insulated solution preparation and transfer device according to claim 6, characterized in that: The vacuum port is connected to a vacuum control valve, and the solution transfer device also includes a pressurized gas storage device connected to the vacuum port.

8. The air-insulated solution preparation and transfer device according to claim 6, characterized in that: The vacuum container is also connected to an inert gas storage device.

9. The air-insulated solution preparation and transfer device according to claim 6, characterized in that: The dissolving kettle is provided with a solvent inlet, and the solvent inlet is connected to a compressible storage container for containing the solvent.

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