An automatic chemical mixing and storage device for seawater pretreatment and its mixing method

Abstract

The present invention relates to the technical field of seawater pretreatment equipment, and particularly relates to a fully automatic medicament mixing and storage device for seawater pretreatment, which includes a mixing and stirring tank, a storage and static settling tank, a control device and a medicament storage tank. The storage and static settling tank is arranged inside the mixing and stirring tank, the control device is connected to one side of the mixing and stirring tank, and the medicament storage tank is connected to one side of the bottom of the mixing and stirring tank; a medicament feeding pipe, a medicament adding pipe and a medicament feeding pump are arranged at the upper end of the mixing and stirring tank. One end of the medicament feeding pipe extends into the storage and static settling tank, the other end of the medicament feeding pipe is connected to the medicament feeding pump, and the medicament adding pipe is connected to one end of the medicament feeding pump. The present invention adopts seven mixing methods, namely air source disturbance mixing, jet suction mixing, spiral channel mixing, baffle disturbance mixing, impeller lifting mixing, circulating storage mixing and auxiliary stirring mixing. Under the combined action of the seven mixing methods, the mixing effect can be fully improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater pretreatment equipment, and particularly to a full-automatic medicament mixing and storage device for seawater pretreatment and a mixing method thereof. Background Art

[0002] In the process of seawater pretreatment, the coagulation and precipitation process often requires the auxiliary addition of medicaments such as coagulants and flocculants to assist in settling suspended particles in seawater and improve the settling rate. Since the amount of seawater treated by the seawater pretreatment system and the change of raw water quality are relatively complex, the conventional medicament mixing and storage device cannot meet the accurate medicament mixing, configuration and dosing process.

[0003] In recent years, as a gradually emerging automatic medicament mixing and stirring technology, the automatic medicament mixing and stirring device has become one of the indispensable devices in the fields of water treatment industry, chemical industry and power industry, etc. It has obvious advantages compared with the traditional medicament mixing and stirring method. This device can ensure the uniformity and accuracy of medicine mixing, and has the characteristics of high speed, high efficiency and good accuracy. The medicament mixing and stirring device runs stably, is easy to operate, greatly shortens the medicament configuration and mixing time, saves a large amount of labor costs, and can effectively control the micro-precision control process in the medicament mixing and stirring process.

[0004] As shown in the Figure 3 description attached, the existing technologies related to medicament mixing and stirring devices often have a single use, and can only be separately applicable to the mixing and stirring process of solid medicaments or liquid medicaments alone. The overall on-site adaptability is poor. The stirring and mixing device and the medicament storage device are often arranged separately. The equipment occupies a large space, the component setting is complex, the comprehensive energy consumption of the system is high, the mixing effect accuracy is poor, the temperature control difference is large, and it is easy to cause the concentration deviation of the medicament mixing solution.

[0005] Therefore, the present application particularly proposes a full-automatic medicament mixing and storage device for seawater pretreatment and a mixing method thereof to solve the above technical problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a full-automatic medicament mixing and storage device for seawater pretreatment and a mixing method thereof. The present invention can ensure the uniformity and accuracy of medicine mixing, and has the characteristics of high speed, high efficiency and good accuracy. The medicament mixing and stirring device runs stably, is easy to operate, greatly shortens the medicament configuration and mixing time, saves a large amount of labor costs, and can effectively control the micro-precision control process in the medicament mixing and stirring process.

[0007] The technical solution adopted by the present invention to solve the above technical problems is as follows: A fully automatic chemical mixing and storage device for seawater pretreatment, which includes a mixing and stirring tank, a storage and static settling tank, a control device, and a chemical storage tank. The storage and static settling tank is arranged inside the mixing and stirring tank. The control device is connected to one side of the mixing and stirring tank, and the chemical storage tank is connected to one side of the bottom of the mixing and stirring tank;

[0008] A chemical feeding pipe, a chemical adding pipe, and a chemical feeding pump are arranged at the upper end of the mixing and stirring tank. One end of the chemical feeding pipe extends into the interior of the storage and static settling tank, and the other end of the chemical feeding pipe is connected to the chemical feeding pump. The chemical adding pipe is connected to one end of the chemical feeding pump, and a chemical adding control valve, a pressure transmitter, and a self-cleaning filter are installed on the chemical adding pipe;

[0009] An impeller stirring device, a circulation mixer, and a spiral mixer are arranged inside the mixing and stirring tank. The impeller stirring device includes a stirring rotating shaft A and an internal circulation delivery pump. The internal circulation delivery pump and the stirring rotating shaft are connected in such a way that the internal circulation delivery pump is arranged at the bottom of the mixing and stirring tank and is drivingly connected to the stirring rotating shaft A. One end of the internal circulation delivery pump is connected to the chemical adding pipe. A balance impeller, an auxiliary impeller, a stirring impeller, and a lifting impeller are connected to the stirring rotating shaft A. The lifting impeller and the stirring impeller are located inside the circulation mixer. The spiral mixer is arranged above the balance impeller, and a mixing chemical adding port is opened at the bottom of the spiral mixer;

[0010] A mixing ejector is connected to the bottom of the chemical storage tank, and the mixing ejector is connected to the mixing and stirring tank through a connecting pipe.

[0011] Further, a chemical inlet pipe is connected to the upper end of the mixing ejector, and a flow controller A and a chemical inlet control valve are connected to the chemical inlet pipe. An air inlet pipe is connected to one end of the mixing ejector, and an air inlet control valve, a gas dryer, and a pressure increasing control valve are connected to the air inlet pipe. A water inlet pipe is arranged at the lower end of the air inlet pipe and is connected to the mixing ejector, and a water inlet control valve is connected to the water inlet pipe.

[0012] Further, a constant temperature controller is installed on the inner side wall of the mixing and stirring tank, a constant temperature control valve and a temperature sensing controller are connected to the outside of the constant temperature controller, and a disturbance baffle is connected to the inside of the constant temperature controller.

[0013] Further, the impeller stirring device further includes a storage stirrer, a stirring rotating shaft B, and a disturbance impeller. The storage stirrer is arranged at the upper end of the mixing and stirring tank, the stirring rotating shaft B is drivingly connected to the storage stirrer, and the disturbance impeller is connected to the stirring rotating shaft B.

[0014] Further, a concentration controller is arranged on one side of the storage stirrer, and the concentration controller is connected to the top of the mixing and stirring tank.

[0015] Further, a reflux pipe is connected to one side of the chemical addition pipe. One end of the reflux pipe is in communication with the mixing and stirring tank, and a reflux control valve is installed on the reflux pipe.

[0016] Further, a microcirculation control valve is connected to the upper end of the chemical addition and delivery pipe, and a flow controller B is connected to the chemical addition pipe.

[0017] Further, a thrust bearing and a support bearing are provided on the stirring rotating shaft. The thrust bearing is arranged at the lower part of the stirring rotating shaft in a sleeved manner, and the support bearing is sleeved on the upper part of the stirring rotating shaft.

[0018] Further, a pressure balancer is connected to the top of the storage and static settlement tank, a circulation controller is connected to the bottom of the storage and static settlement tank, and a liquid level controller is connected to one side of the storage and static settlement tank.

[0019] A mixing method for a full-automatic chemical mixing and storage device for seawater pretreatment includes a liquid chemical mixing method, a solid chemical mixing method, and a simultaneous mixing method for solid and liquid chemicals, and includes the following mixing steps:

[0020] Liquid chemical mixing method:

[0021] Step A1: Under the control of the control device, the liquid chemical is inhaled into the mixing injector through the flow controller A and the chemical inlet control valve for primary mixing with gas source disturbance;

[0022] Step A2: The pre-mixing process of the chemicals for secondary mixing by injection and suction. The pre-mixed chemicals enter the spiral mixer for tertiary mixing in the spiral flow channel;

[0023] Step A3: The double-vortex baffle disturbance for quaternary mixing is formed by the tangential arrangement of the double-scroll type outlet of the spiral mixer and the disturbance baffle. The chemical solution at the bottom of the circulation mixer is lifted to the outlet of the circulation mixer to form the multi-angle longitudinal impeller lift for quinary mixing;

[0024] Step A4: The circulation controller realizes the six-time mixing of the chemical reflux and circulation storage between the mixing and stirring tank and the storage and static settlement tank; the storage stirrer at the upper end of the storage and static settlement tank drives the stirring rotating shaft B for auxiliary stirring for seven-time mixing;

[0025] Solid chemical mixing method:

[0026] Step B1: Under the control of the control device, the solid chemical is inhaled into the mixing injector through the pressure boosting control valve and the chemical storage tank for primary mixing with gas source disturbance;

[0027] Step B2: The pre-mixing process of the chemicals for secondary mixing by injection and suction. The pre-mixed chemicals enter the spiral mixer for tertiary mixing in the spiral flow channel,

[0028] Step B3: The tangential arrangement of the double-scroll outlets of the spiral mixer and the disturbance baffle work together to form a double-vortex baffle disturbance for four times of mixing, and the chemical solution at the bottom of the circulation mixer is lifted to the outlet of the circulation mixer to form a multi-angle longitudinal impeller lift for five times of mixing;

[0029] Step B4: The circulation controller realizes the six-time mixing of the chemical reflux circulation storage between the mixing and stirring tank and the storage and static tank; the storage and static tank stores the chemical, and the stirrer is used for auxiliary stirring for seven times of mixing;

[0030] The solid-liquid chemical mixing method is the combination of the above-mentioned solid chemical mixing and the solid chemical mixing method.

[0031] The advantages of the present invention are as follows: The present invention provides a full-automatic chemical mixing and storage device for seawater pretreatment and its mixing method, which has the following advantages:

[0032] 1. This device is a general-purpose mixing and storage integrated device that is suitable for the free conversion of solid chemicals and liquid chemicals at the same time. This device has the characteristics of simple operation, stable performance, wide application, high precision, convenient use and low cost.

[0033] 2. The present invention adopts seven mixing methods, namely gas-source disturbance mixing, jet suction mixing, spiral flow channel mixing, baffle disturbance mixing, impeller lift mixing, circulation storage mixing and auxiliary stirring mixing. Under the combined action of the seven mixing methods, the mixing effect can be fully improved, especially for the mixing, preparation and storage processes of some saturated chemical solutions that are difficult to dissolve and easy to precipitate. It has certain technical reference value for the chemical mixing, preparation and storage processes in related industries.

[0034] 3. The present invention adopts the control device system logic control program to automatically implement the control and adjustment project, so as to realize the full-automatic continuous, automatic and accurate control process of chemical mixing, preparation and storage, and minimize the degree of human intervention.

[0035] 4. The present invention uses compressed air and dissolved water source as the chemical conveying carrier. Before entering the mixing device in the state of compressed air mixing disturbance, it is mixed once through the mixing and injection device, and then enters the spiral mixing flow channel at the bottom of the mixing device for secondary mixing, which fully improves the pre-mixing effect of the chemical.

[0036] 5. In the present invention, a disturbance baffle is fixedly connected inside the constant temperature controller of the mixing and stirring tank. The disturbance baffle is arranged symmetrically and can freely adjust the tangential angle according to the control signal of the control device.

[0037] 6. The present invention uses a mixed dosing port to evenly scatter and distribute the reagent solution into the flow channel of the spiral mixer for re-mixing. The spiral mixer is a pipe mixer with an internal spiral form of a double-scroll outlet. The double-sided outlets of the spiral mixer are tangentially arranged with the inner tank of the mixing and stirring tank. The function of its internal spiral form is to extend the reagent mixing path, and the function of the tangential arrangement of its double-scroll outlets is to form an opposite double-vortex disturbance form with the balance impeller and the auxiliary impeller to promote the horizontal mixing and dissolution process of the reagent, having a good mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 is a schematic structural diagram of the present invention;

[0040] Figure 2 is a top view structural diagram of the mixing and stirring tank in the present invention;

[0041] Figure 3 is a schematic structural diagram of a reagent mixing and storage device in the prior art;

[0042] Wherein:

[0043] 1. Mixing and stirring tank; 2. Storage and static tank; 3. Control device;

[0044] 4. Water inlet control valve; 5. Air inlet control valve; 6. Gas dryer;

[0045] 7. Boost control valve; 8. Reagent storage tank; 9. Disturbance control valve;

[0046] 10. Mixing injector; 11. Flow controller A; 12. Medicine inlet control valve;

[0047] 13. Mixed dosing port; 14. Balance impeller; 15. Auxiliary impeller;

[0048] 16. Thrust bearing; 17. Support bearing; 18. Spiral mixer;

[0049] 19. Disturbance baffle; 20. Circulation mixer; 21. Stirring impeller;

[0050] 22. Lifting impeller; 23. Circulation controller; 24. Internal circulation transfer pump;

[0051] 25. Self-cleaning filter; 26. Pressure transmitter; 27. Return control valve;

[0052] 28. Impact control valve; 29. Storage agitator; 30. Concentration controller;

[0053] 31. Chemical dosing transfer pump; 32. Microcirculation control valve; 33. Chemical dosing control valve;

[0054] 34. Flow controller B; 35. Pressure balancer; 36. Liquid level controller;

[0055] 37. Constant temperature control valve; 38. Constant temperature controller; 39. Temperature sensor controller;

[0056] 40. Agitation impeller; 41. Chemical dosing transfer pipe; 42. Chemical dosing pipe;

[0057] 43. Connecting pipe; 44. Agitation rotating shaft A; 45. Return pipe;

[0058] 46. Agitation rotating shaft B; 47. Chemical inlet pipe; 48. Air inlet pipe;

[0059] 49. Water inlet pipe. Detailed implementation manners

[0060] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0061] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0062] Embodiment 1:

[0063] Figure 1 is a structural schematic diagram of the present invention, Figure 2 is a top view structural schematic diagram of the mixing and stirring tank 1 in the present invention, as Figure 1 shown in Figure 2 a full-automatic chemical agent mixing and storage device for seawater pretreatment, including a mixing and stirring tank 1, a storage and static settling tank 2, a control device 3 and a chemical agent storage tank 8. The storage and static settling tank 2 is arranged inside the mixing and stirring tank 1. The control device 3 is connected to one side of the mixing and stirring tank 1. The chemical agent storage tank 8 is connected to one side of the bottom of the mixing and stirring tank 1. Through the above structure, the present invention can set two access methods for solid chemical agents and liquid chemical agents, which is suitable for the mixing and configuration process of various forms of chemical agents, and can automatically adjust the dosage of chemical agents according to the requirements of chemical agent concentration. The present invention can realize the accurate mixing and dosing process of chemical agents through the control device 3 and the feedback information of sensors;

[0064] The present invention is provided with a chemical agent feeding pipe 41, a chemical agent adding pipe 42 and a chemical agent feeding pump 31 at the upper end of the mixing and stirring tank 1. One end of the chemical agent feeding pipe 41 extends into the interior of the storage and static settling tank 2, and the other end of the chemical agent feeding pipe 41 is connected to the chemical agent feeding pump 31. The chemical agent adding pipe 42 is connected to one end of the chemical agent feeding pump 31. A chemical agent adding control valve 33, a pressure transmitter 26 and a self-cleaning filter 25 are installed on the chemical agent adding pipe 42. One side of the chemical agent adding pipe 42 is connected with a return pipe 45. One end of the return pipe 45 is communicated with the mixing and stirring tank 1. A return control valve 27 is installed on the return pipe 45. The present invention adopts the superposition and integration method of the mixing and stirring tank 1 and the storage and static settling tank 2, which greatly reduces the space occupied by the equipment. A pressure balancer 35 is connected to the top of the storage and static settling tank 2, a circulation controller 23 is connected to the bottom of the storage and static settling tank 2, and a liquid level controller 36 is connected to one side of the storage and static settling tank 2. The chemical agent circulation and reflux can be realized by using the circulation controller 23. The circulation controller 23 can feedback the liquid level signal detected by the liquid level controller 36 of the storage and static settling tank 2 to the control device 3, and then the control device 3 adjusts the opening degree of the circulation controller 23 for reflux to the mixing and stirring tank 1, so as to maintain the liquid level in the storage and static settling tank 2 in a relatively constant state;

[0065] The mixing and stirring tank 1 adopts an ellipsoidal bottom space layout form, and an internal circulation conveying pump 24 is arranged at the bottom, which can avoid the deposition of poorly soluble medicaments; an impeller stirring device, a circulation mixer 20 and a spiral mixer 18 are arranged inside the mixing and stirring tank 1. The impeller stirring device includes a stirring rotating shaft A44 and the internal circulation conveying pump 24. The internal circulation conveying pump 24 and the stirring rotating shaft are connected. The internal circulation conveying pump 24 is arranged at the bottom of the mixing and stirring tank 1, and is drivingly connected to the stirring rotating shaft A44. One end of the internal circulation conveying pump 24 is connected to the chemical feeding pipe 42. A balance impeller 14, an auxiliary impeller 15, a stirring impeller 21 and a lifting impeller 22 are connected to the stirring rotating shaft A44. The lifting impeller 22 and the stirring impeller 21 are located inside the circulation mixer 20. The spiral mixer 18 is arranged above the balance impeller 14. A mixing chemical feeding port 13 is opened at the bottom of the spiral mixer 18. The mixing chemical feeding port 13 is located at the bottom of the center of the spiral mixer 18. The medicament solution after gas source disturbance mixing and jet suction mixing is evenly scattered and distributed into the flow channel of the spiral mixer 18 through the mixing chemical feeding port 13 for re-mixing; the spiral mixer 18 is a pipe mixer with an internal spiral form of a double volute outlet. The double-sided outlets of the spiral mixer 18 are tangentially arranged with the inner tank body of the mixing and stirring tank 1. The function of its internal spiral form is to extend the medicament mixing path, and the function of the tangential arrangement of its double volute outlets is to form an opposite double-vortex disturbance form with the balance impeller 14 and the auxiliary impeller 15 to promote the lateral mixing and dissolution process of the medicament; the thrust bearing 16 and the support bearing 17 are both enclosed self-lubricating cooling bearings. The support bearing 17 mainly supports the stirring impeller 21 and the lifting impeller 22, and works together with the balance impeller 14 to balance. The thrust bearing 16 plays an axial thrust role on the stirring impeller 21 and the lifting impeller 22; the auxiliary impeller 15 is located below the balance impeller 14 and at the lowest point of the mixing and stirring tank 1, and its function is to dredge and guide the medicament solution to avoid impurity deposition and blockage of the inlet of the internal circulation conveying pump 24; the lifting impeller 22 forms an upward lifting force during rotation, lifting the medicament solution at the bottom of the circulation mixer 20 to the outlet of the circulation mixer 20 to form a multi-angle longitudinal mixing process; the stirring impeller 21 is located at the middle position of the lifting impeller 22, and its function is to stir and mix the medicament circulation and lifting process in the circulation mixer 20; the conveying impeller is a single-suction impeller structure, located inside the pump casing cavity of the internal circulation conveying pump 24. During rotation, a vacuum area is formed at the center position of the conveying impeller to suck the medicament, and then the medicament is thrown out through the rotating centrifugal action to complete the internal circulation conveying process of the medicament and convey it to the storage and static tank 2; the present invention adopts a multi-stage impeller stirring method to improve the mixing effect, which can effectively reduce the concentration control deviation. The present invention adopts the internal circulation conveying pump 24 to take into account the large-impact large-dose chemical feeding process, saves the equipment and facility cost, and reduces the equipment occupation space;

[0066] The self-cleaning filter 25 in the present invention is located at the outlet end of the internal circulation delivery pump 24. Its function is to intercept impurities mixed in the process of chemical agent mixing and dissolution, and automatically realize the online backwashing and sewage discharging operation according to the differential pressure change detected by the pressure transmitter 26. At the same time, it serves as the low-point sewage outlet of the mixing and stirring tank 1; the reflux control valve 27 is located at the inlet end of the storage and static tank 2. Its function is to automatically adjust and control the amount of chemical agent entering the storage and static tank 2 according to the chemical agent circulation return flow controlled by the circulation controller 23 and the liquid level data monitored by the liquid level controller 36; the impact control valve 28 is connected to the outlet end of the chemical agent adding control valve 33. Its function is to provide an impact large-dose chemical agent adding process during the start-up or shutdown of the seawater pretreatment process system; in the present invention, the storage agitator 29 is provided with a disturbance impeller 40 which is a single-blade double-guided stirring impeller 21; its function is to avoid the precipitation during the storage of chemical agents and resulting in concentration control deviation by means of an auxiliary stirring and mixing method; the chemical agent delivery pump 31 is a fixed-frequency chemical agent delivery and dosing device. During the chemical agent dosing process, the opening degree of the chemical agent adding control valve 33 is adjusted according to the flow feedback signal monitored by the flow controller B34 to the control device 3, and the external chemical agent dosage is jointly controlled with the microcirculation control valve 32. The microcirculation control valve 32 is connected to the outlet end and the inlet end of the chemical agent delivery pump 31, and controls the opening degree change according to the reverse logic of the opening degree of the chemical agent adding control valve 33, so as to maintain the accurate dosing process of the external chemical agent dosage; the pressure balancer 35 is located at the top of the storage and static tank 2. Its function is to balance the internal and external pressures of the storage and static tank 2, and avoid the unsmooth circulation of chemical agents caused by the pressure in the storage and static tank 2 being lower than the atmospheric pressure for the circulation controller 23 and the chemical agent delivery pump 31; the constant temperature controller 38 is a preheating and constant temperature control device 3 which is independently sealed inside the mixing and stirring tank 1 and the storage and static tank 2. Its form is a heat exchanger with a spiral-wound and conducting heat exchange fin structure; the constant temperature control valve 37 automatically adjusts the amount of heat source entering the constant temperature controller 38 according to the constant temperature signal monitored by the temperature sensor controller 39 and fed back to the control device 3, so as to maintain the constant temperature control state of the chemical agents in the mixing and stirring tank 1 and the storage and static tank 2;

[0067] At the bottom of the medicine storage tank 8 of the present invention, a mixing injector 10 is connected. The mixing injector 10 is interconnected with the mixing and stirring tank 1 through a connecting pipe 43. At the upper end of the mixing injector 10, a medicine inlet pipe 47 is connected. A flow controller A11 and a medicine inlet control valve 12 are connected to the medicine inlet pipe 47. One end of the mixing injector 10 is connected to an air inlet pipe 48. An air inlet control valve 5, a gas dryer 6 and a pressure boosting control valve 7 are connected to the air inlet pipe 48. A water inlet pipe 49 is arranged at the lower end of the air inlet pipe 48. The water inlet pipe 49 is interconnected with the mixing injector 10. A water inlet control valve 4 is connected to the water inlet pipe 49. The opening degrees of the water inlet control valve 4, the flow controller A11, the medicine inlet control valve 12 and the dosing amount of the solid medicine D in the medicine storage tank 8 are all fed back to the control device 3 according to the concentration signal detected by the concentration controller 30. Then, the control device 3 adjusts the opening degrees of the water inlet control valve 4, the flow controller A11, the medicine inlet control valve 12 and the dosing amount of the solid medicine in the medicine storage tank 8, so as to ensure the accurate control process of the medicine concentration in the mixing and stirring tank 1;

[0068] The present invention uses compressed air and dissolved water source as the medicine conveying carriers. Before entering the mixing device under the state of compressed air mixing and disturbance, it is mixed once through the mixing injection device, and then enters the spiral mixing flow channel at the bottom of the mixing device for secondary mixing, which fully improves the medicine premixing effect. The present invention can place the mixing injection device in front according to the actual mode of the mixing and stirring device, so as to serve as an auxiliary medicine handling device. At the same time, by extending the connecting pipe 43 entering the mixing and stirring tank 1, it is more convenient for the medicine to achieve a full premixing effect;

[0069] The functions of the flow controller A11 and the medicine inlet control valve 12 are to accurately adjust the amount of liquid medicine added. The function of the medicine storage tank 8 is to accurately adjust the amount of solid medicine added. The function of the water inlet control valve 4 is to accurately adjust the amount of solvent required for medicine mixing, and together with the compressed air controlled by the disturbance control valve 9, it serves as the conveying power source of the solid medicine and the liquid medicine inhaled by the mixing injector 10; The air inlet control valve 5 is the first-stage compressed air inlet valve. Its first function is to act jointly with the disturbance control valve 9 as the main power source of the medicine inhalation mode of the mixing injector 10 and the aeration and disturbance mixing of medicine premixing. Its second function is to provide compressed air assistance for the dosing process of the solid medicine in the medicine storage tank 8; The gas dryer 6 and the pressure boosting control valve 7 are located at the inlet end of the solid medicine dosing tank in the medicine storage tank 8. By controlling the pressure in the solid medicine dosing tank (not shown in the figure) through the pressure boosting control valve 7, it assists the accurate dosing process of the solid medicine through the screw dosing pump; The function of the gas dryer 6 is to absorb the moisture in the compressed air, which can avoid the solid medicine in the medicine storage tank 8 from absorbing water and caking;

[0070] The present invention installs a constant temperature controller 38 on the inner wall of the mixing and stirring tank 1. A constant temperature control valve 37 and a temperature sensing controller 39 are connected to the outside of the constant temperature controller 38. It can automatically implement the control and adjustment process according to the system logic control program of the control device 3, so as to realize the full-automatic continuous, automatic, and precise control process of chemical agent mixing, preparation, and storage. A disturbance baffle 19 is connected to the inside of the constant temperature controller 38. The disturbance baffle 19 is arranged symmetrically and can freely adjust the tangential angle according to the control signal of the control device 3. The present invention abandons the traditional electric heating constant temperature device, effectively reducing the energy consumption of the equipment. The impeller stirring device in the present invention further includes a storage stirrer 29, a stirring rotating shaft B46, and a disturbance impeller 40. The storage stirrer 29 is arranged at the upper end of the mixing and stirring tank 1. The stirring rotating shaft B46 and the storage stirrer 29 are drivingly connected to each other. The disturbance impeller 40 is connected to the stirring rotating shaft B46. The present invention can realize the rapid mixing and configuration process of chemical agents by adjusting the rotation speed of the impeller stirring device and the disturbance angle of the disturbance baffle 19;

[0071] The present invention is provided with a concentration controller 30 on one side of the storage stirrer 29. The concentration controller 30 is connected to the top of the mixing and stirring tank 1. A microcirculation control valve 32 is connected to the upper end of the chemical agent delivery pipe 41. A flow controller B34 is connected to the chemical agent pipe 42. The self-controlled microcirculation is used to adjust the chemical agent dosage, realizing the precise reflux control of the chemical agent addition process during operation and avoiding the increase of equipment cost by setting a frequency conversion control device 3.

[0072] Working principle: According to the mixing method of the above full-automatic chemical agent mixing and storage device, including the liquid chemical agent mixing method, the solid chemical agent mixing method, and the solid-liquid chemical agent simultaneous mixing method, the mixing effect is fully improved by the combined action of seven methods, namely gas source disturbance mixing, jet suction mixing, spiral flow channel mixing, baffle disturbance mixing, impeller lifting mixing, circulating storage mixing, and auxiliary stirring mixing. The specific mixing steps are as follows:

[0073] Liquid chemical agent mixing method:

[0074] Step A1: Under the control of the control device 3, the liquid chemical agent is inhaled into the mixing injector 10 through the flow controller A11 and the chemical agent inlet control valve 12 for the first time of gas source disturbance mixing;

[0075] Step A2: The pre-mixing process of the chemical agent for the second time of jet suction mixing. The pre-mixed chemical agent enters the spiral mixer 18 for the third time of spiral flow channel mixing;

[0076] Step A3: The double spiral outlet of the spiral mixer 18 is tangentially arranged and jointly acts with the disturbance baffle 19 to form the fourth time of double vortex baffle disturbance mixing. The chemical agent solution at the bottom of the circulation mixer 20 is lifted to the outlet of the circulation mixer 20 to form the fifth time of multi-angle longitudinal impeller lifting mixing;

[0077] Step A4: The circulation controller 23 realizes six times of mixing for the chemical agent reflux circulation storage between the mixing and stirring tank 1 and the storage and static tank 2; the storage stirrer 29 at the upper end of the storage and static tank 2 drives the stirring rotating shaft B46 to perform seven times of auxiliary mixing.

[0078] Solid chemical agent mixing method:

[0079] Step B1: Under the control of the control device 3, the solid chemical agent is inhaled into the mixing injector 10 through the pressure increasing control valve 7 and the chemical agent storage tank 8 for the first mixing with gas source disturbance.

[0080] Step B2: In the process of pre-mixing the chemical agent for the second mixing by injection and inhalation, the pre-mixed chemical agent enters the spiral mixer 18 for the third mixing in the spiral flow channel.

[0081] Step B3: The double spiral outlet of the spiral mixer 18 is tangentially arranged and acts together with the disturbance baffle 19 to form the fourth mixing with double vortex baffle disturbance. The chemical agent solution at the bottom of the circulation mixer 20 is lifted to the outlet of the circulation mixer 20 to form the fifth mixing with multi-angle longitudinal impeller lifting.

[0082] Step B4: The circulation controller 23 realizes six times of mixing for the chemical agent reflux circulation storage between the mixing and stirring tank 1 and the storage and static tank 2; the storage stirrer 29 of the storage and static tank 2 performs seven times of auxiliary mixing.

[0083] The method for simultaneously mixing solid and liquid chemical agents is the combination of the above solid chemical agent mixing method and the solid chemical agent mixing method.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic chemical mixing and storage device for seawater pretreatment, comprising a mixing and stirring tank (1), a storage and standing tank (2), a control device (3) and a chemical storage tank (8). The storage and standing tank (2) is arranged inside the mixing and stirring tank (1). The control device (3) is connected to one side of the mixing and stirring tank (1), and the chemical storage tank (8) is connected to one side of the bottom of the mixing and stirring tank (1). Characterized in that: At the upper end of the mixing and stirring tank (1), there are a chemical feeding pipe (41), a chemical adding pipe (42) and a chemical feeding pump (31). One end of the chemical feeding pipe (41) extends into the interior of the storage and standing tank (2), and the other end of the chemical feeding pipe (41) is connected to the chemical feeding pump (31). The chemical adding pipe (42) is connected to one end of the chemical feeding pump (31). A chemical adding control valve (33), a pressure transmitter (26) and a self-cleaning filter (25) are installed on the chemical adding pipe (42). Inside the mixing and stirring tank (1), there are an impeller stirring device, a circulating mixer (20) and a spiral mixer (18). The impeller stirring device includes a stirring rotating shaft A (44) and an internal circulating pump (24). The internal circulating pump (24) is arranged at the bottom of the mixing and stirring tank (1), and is drivingly connected between the internal circulating pump (24) and the stirring rotating shaft A (44). One end of the internal circulating pump (24) is connected to the chemical adding pipe (42). The stirring rotating shaft A (44) is connected with a balance impeller (14), an auxiliary impeller (15), a stirring impeller (21) and a lifting impeller (22). The lifting impeller (22) and the stirring impeller (21) are located inside the circulating mixer (20). The spiral mixer (18) is arranged at the upper end of the balance impeller (14), and a mixing chemical adding port (13) is opened at the bottom of the spiral mixer (18). At the bottom of the chemical storage tank (8), there is a mixing ejector (10), and the mixing ejector (10) is connected to the mixing and stirring tank (1) through a connecting pipe (43).

2. The automatic chemical mixing and storage device for seawater pretreatment according to claim 1, Characterized in that: At the upper end of the mixing ejector (10), there is a chemical inlet pipe (47). A flow controller A (11) and a chemical inlet control valve (12) are connected to the chemical inlet pipe (47). One end of the mixing ejector (10) is connected to an air inlet pipe (48). An air inlet control valve (5), a gas dryer (6) and a pressure boosting control valve (7) are connected to the air inlet pipe (48). At the lower end of the air inlet pipe (48), there is a water inlet pipe (49), and the water inlet pipe (49) is connected to the mixing ejector (10). A water inlet control valve (4) is connected to the water inlet pipe (49).

3. The automatic chemical mixing and storage device for seawater pretreatment according to claim 1, Characterized in that: The inner wall of the mixing and stirring tank (1) is equipped with a constant temperature controller (38). A constant temperature control valve (37) and a temperature sensor controller (39) are connected to the outside of the constant temperature controller (38), and a disturbance baffle (19) is connected to the inside of the constant temperature controller (38).

4. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 1, characterized in that: The impeller stirring device further includes a storage stirrer (29), a stirring rotating shaft B (46) and a disturbance impeller (40). The storage stirrer (29) is arranged at the upper end of the mixing and stirring tank (1). The stirring rotating shaft B (46) and the storage stirrer (29) are driven and connected to each other, and the disturbance impeller (40) is connected to the stirring rotating shaft B (46).

5. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 4, characterized in that: A concentration controller (30) is arranged on one side of the storage stirrer (29), and the concentration controller (30) is connected to the top of the mixing and stirring tank (1).

6. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 1, characterized in that: A reflux pipe (45) is connected to one side of the chemical adding pipe (42). One end of the reflux pipe (45) is communicated with the mixing and stirring tank (1), and a reflux control valve (27) is installed on the reflux pipe (45).

7. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 1, characterized in that: A microcirculation control valve (32) is connected to the upper end of the chemical adding and conveying pipe (41), and a flow controller B (34) is connected to the chemical adding pipe (42).

8. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 1, characterized in that: A thrust bearing (16) and a support bearing (17) are arranged on the stirring rotating shaft. The thrust bearing (16) is arranged at the lower part of the stirring rotating shaft in a sleeved manner, and the support bearing (17) is sleeved on the upper part of the stirring rotating shaft.

9. A full-automatic chemical mixing and storage device for seawater pretreatment according to claim 1, characterized in that: A pressure balancer (35) is connected to the top of the storage and static box (2). A circulation controller (23) is connected to the bottom of the storage and static box (2), and a liquid level controller (36) is connected to one side of the storage and static box (2).

10. A mixing method of a full-automatic chemical mixing and storage device for seawater pretreatment based on claim 1, characterized in that, including a liquid chemical mixing method, a solid chemical mixing method and a solid-liquid chemical simultaneous mixing method, and including the following mixing steps: Liquid chemical mixing method: Step A1: Under the control of the control device (3), the liquid chemical is inhaled into the mixing injector (10) through the flow controller A (11) and the chemical inlet control valve (12) for primary mixing with gas source disturbance; Step A2: The pre-mixing process of the chemical for secondary mixing by injection and inhalation. The pre-mixed chemical enters the spiral mixer (18) for tertiary mixing in the spiral flow channel; Step A3: The tangential arrangement of the double-scroll outlets of the spiral mixer (18) and the disturbance baffle (19) work together to form a double-vortex baffle disturbance for four times of mixing. The chemical solution at the bottom of the circulation mixer (20) is lifted to the outlet of the circulation mixer (20) to form a multi-angle longitudinal impeller lift for five times of mixing; Step A4: The circulation controller (23) realizes the six-time mixing of the chemical agent reflux cycle storage between the mixing and stirring tank (1) and the storage and static tank (2); the storage stirrer (29) at the upper end of the storage and static tank (2) drives the stirring rotating shaft B (46) for the seven-time mixing of auxiliary stirring; Solid chemical agent mixing method: Step B1: Under the control of the control device (3), the solid chemical agent is inhaled into the mixing injector (10) through the pressure-increasing control valve (7) and the chemical agent storage tank (8) for the first-time mixing of air source disturbance; Step B2: The pre-mixing process of the chemical agent for the second-time mixing by injection and inhalation. The pre-mixed chemical agent enters the spiral mixer (18) for the third-time mixing in the spiral flow channel, Step B3: The tangential arrangement of the double-scroll outlets of the spiral mixer (18) and the disturbance baffle (19) work together to form a double-vortex baffle disturbance for four times of mixing. The chemical solution at the bottom of the circulation mixer (20) is lifted to the outlet of the circulation mixer (20) to form a multi-angle longitudinal impeller lift for five times of mixing; Step B4: The circulation controller (23) realizes the six-time mixing of the chemical agent reflux cycle storage between the mixing and stirring tank (1) and the storage and static tank (2); the storage stirrer (29) of the storage and static tank (2) performs the seven-time mixing of auxiliary stirring; The method for simultaneous mixing of solid and liquid chemical agents is the combination of the above solid chemical agent mixing and the solid chemical agent mixing method.

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