CN212757332U

CN212757332U - Double-pump system for non-stirring extraction tank

Info

Publication number: CN212757332U
Application number: CN202020838075.8U
Authority: CN
Inventors: 赵尚志
Original assignee: Changsha Ruixi Environmental Protection Equipment Manufacturing Co ltd
Current assignee: Changsha Ruixi Environmental Protection Equipment Manufacturing Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-03-23
Anticipated expiration: 2030-05-19

Abstract

The utility model discloses a double-pump system for a non-stirring extraction tank, which comprises a pump A and a pump B, wherein the pump A and the pump B are arranged outside the non-stirring extraction tank; the water phase inlet of the pump A is communicated with a water phase pipeline, and the water phase outlet of the pump A is communicated with the inlet of the pipeline type mixer; an oil phase inlet of the pump B is communicated with an oil phase pipeline, and an oil phase outlet of the pump B is communicated with an inlet of the pipeline type mixer; the outlet of the pipeline type mixer is communicated with a clarifying chamber of the non-stirring extraction tank. The utility model is energy-saving and low in operation cost; the mixing time is shortened, the efficiency is high, and the time consumption in unit volume is short; the double pumps respectively feed two phases to improve the stirring and mixing effect and improve the yield; convenient maintenance, the fault rate is low, and is easy and simple to handle, improve equipment stability.

Description

Double-pump system for non-stirring extraction tank

Technical Field

The utility model relates to a double pump system for having stirring extraction tank.

Background

Extraction, also known as solvent extraction or liquid-liquid extraction, is a unit operation that separates mixtures by utilizing the different solubilities of components in the system in a solvent. That is, the method is a method of transferring a solute substance from one solvent to another solvent by utilizing the difference in solubility or partition coefficient of the substance in two solvents which are not soluble (or slightly soluble) with each other. The method is widely applied to chemical, metallurgical, food and other industries and is generally applied to petroleum refining industry. The operation of separating the two immiscible liquids after extraction is called liquid separation.

Solid-liquid extraction, also known as leaching, uses a solvent to separate the components of a solid mixture, such as water to extract sugars from sugar beets; extracting soybean oil from soybeans with alcohol to increase oil yield; the leaching of effective components from Chinese medicinal materials with water to obtain fluid extract is called "percolation" or "leaching".

Compared with other methods for separating solution components, the extraction method has the advantages of normal-temperature operation, energy conservation, no involvement of solid and gas, and convenient operation. Extraction is often advantageous when applied in several situations: the boiling points of all components of the feed liquid are close, even azeotrope is formed, and the distillation method is not easy to work in the occasions, such as separation of alkane and aromatic hydrocarbon in petroleum fraction and dephenolization of coal tar; secondly, separating low-concentration high-boiling components, and using rectification for large energy consumption, such as dehydration of dilute acetic acid; thirdly, separation of various ions, such as separation and purification of mineral leaching solution, if chemicals are added for fractional precipitation, the separation quality is poor, and the loss is large due to filtration operation; separation of unstable substances (e.g. heat-sensitive substances), e.g. penicillin from fermentation broth.

The use of extraction is still under development. The majority of elements in the periodic table can be extracted and separated by extraction. The selection and development of extraction agents, the determination of processes and operating conditions, and the design and calculation of flow and equipment are the subjects of extraction operation development.

The extraction equipment is also called extractor, a kind of mass transfer equipment used for extraction operation, can make the extracting agent contact with the feed liquid well, realize the perfect separation of the components contained in the feed liquid, and has two kinds of classification contact and differential contact. In an extraction apparatus, one phase is usually dispersed in the other phase in the form of droplets, and is rarely dispersed in the form of a liquid film. Common extraction equipment is: a mixer-settler, an extraction tower and a centrifugal extractor. The utility model relates to a mixing clarifier.

Mixing and clarifying: the device consists of a mixing chamber and a clarifying chamber, and belongs to a graded contact mass transfer device. The mixing chamber is equipped with an agitator to promote droplet break-up and uniform mixing. Some agitators are capable of pumping the heavy phase from below, thereby ensuring that the heavy phase is circulated between stages. The clarifying chamber is a hollow chamber with a larger horizontal cross section, and is sometimes provided with a guide plate and a wire mesh for accelerating the coagulation and stratification of liquid drops. Depending on the separation requirements, the mixer-settler can be used in a single stage or can be cascaded. When the cascade is operated in countercurrent, the feed liquid and the extractant are respectively added to the stages at the two ends of the cascade, and the raffinate and the extract are led out from the stages at the opposite positions. The working volume of the mixing chamber can be calculated from the total flow of feed and extractant times the time required for the extraction process. The horizontal cross-sectional area of the clarifying chamber can be calculated by dividing the flow rate of the dispersed phase liquid by the coalescence delamination rate of the droplets. These operating parameters are subject to experimental determination. It is believed that the stage efficiency is approximately equal when the same stirring power is consumed per unit volume of the mixing chamber. Therefore, during the amplification design, the production equipment can be designed according to the actually measured extraction time and the layering speed. The mixer-settler has simple structure, high stage efficiency and small amplification effect, can be suitable for various production scales, but has larger investment and operation cost.

An extraction tower: the tower equipment used for extraction comprises a packed tower, a sieve plate tower, a rotating disc tower, a pulsating tower, a vibrating plate tower and the like. The tower body is a vertical cylinder. The light phase enters from the bottom of the tower and overflows from the top of the tower; adding the heavy phase from the top of the tower and leading out from the bottom of the tower; the two flow in the tower in opposite directions. Except the sieve plate tower, most of various extraction towers belong to differential contact mass transfer equipment. The middle part of the tower is a working section, and the two ends of the tower are separation sections which are respectively used for the coagulation and delamination of dispersed phase droplets and the sedimentation and separation of fine droplets carried by a continuous phase. In the extraction packed tower and sieve plate tower, the liquid is dispersed and mixed by the energy of the liquid, so that the equipment efficiency is low and the equipment is only used for the occasions with easy extraction or low requirements.

A centrifuge special for extraction: since the settling and stratification of the droplets can be accelerated by centrifugal force, it is allowed to intensify agitation to finely break the droplets, thereby enhancing the extraction operation. Centrifugal extractors have two types, staged contact and differential contact. The former is added with a stirring device in a centrifugal separator to form a single-stage or multi-stage centrifugal extractor, such as a Lewis tower type centrifugal extractor and a cylinder type centrifugal extractor. The drum of the latter is internally provided with a plurality of layers of concentric cylinders, the walls of the cylinders are provided with holes, and the liquid is dispersed into a film shape and a drop shape, such as a Bodberg centrifugal extractor. The centrifugal extractor is especially suitable for two-phase systems with small density difference or easy emulsification, and is also suitable for extracting substances with unstable chemical and physical properties due to the short retention time of materials in the centrifugal extractor.

However, the inner cavity of the traditional extraction equipment is provided with a mixing chamber and a clarifying chamber (see figure 1), wherein a stirring rod is arranged in the mixing chamber, and the stirring in the mixing chamber is composed of a motor and a speed reducer. The belt pulley, the belt, the motor frequency converter and the stirring rod are formed, the structure is large, the occupied space of parts is large, the failure rate is high, the later maintenance and replacement are inconvenient, and the equipment investment cost, the operation cost and the maintenance cost are also high. Taking a stirring chamber for harvesting at 1m, the price of the extractant in the current market is about 30000 Yuan/m, taking a 10-grade extraction box as an example, the investment cost of the optical reagent needs more than 30 investments in the prescription, and the investment of equipment is not calculated yet. In addition, the transparent PVC plate is easy to stick dirt on the surface and is fuzzy after being soaked in the oil-containing solution for a long time, so that the solution movement (solution resolution, mixing condition and the like) is difficult to monitor in the actual production, and the first data on the site is not easy to obtain.

The utility model discloses the people has adopted cancellation mixing chamber and the puddler in the mixing chamber (two regions about separating into in the no stirring extraction tank, the lower part region is equipped with aqueous phase pipeline and oil phase pipeline, the upper portion region is the clarification chamber), and replace the puddler with a pump instead (see fig. 2), the difference of pump and puddler lies in, the puddler mixes the stirring in injecing the space, the material that will stir is carried in next process by other conveyor again, and the effect of pump is carried next process with the material from last process through the turbine rotation, and the in-process material from last process to next process mixes rapidly in the pump, can make mixing efficiency higher, and the small of pump, investment cost is low, later maintenance or the cost of changing are also low. The pump can deliver highly volatile and gas-containing liquids, but is not used to deliver thicker liquids with viscosities greater than 7 pa.s and unclean liquids containing solid particles. The pump features small flow, high lift and self-suction function, and can be used for conveying solid-free particles with viscosity less than 5 degrees and liquid similar to water. Such as gasoline, kerosene, alcohol, etc., and can be used for small steam boiler water supply, chemical industry, pharmacy, high-rise water supply, etc. The flow passage component is also made of stainless steel and other materials and can be used for conveying acid and alkali corrosive liquid. The temperature of the conveying medium is-20 to +80 ℃. The pump is suitable for most extraction equipment, and the oil phase and the water phase in the extraction equipment are mixed in the pump, so that the mixing effect is greatly improved compared with that of a stirring device. However, utility model people discover in follow-up experiments, when only adopting a pump directly to be connected with aqueous phase and oil phase input port again by same export output, the double-phase transition that causes easily mixes makes follow-up phase splitting difficult: 2 enter 1 turbo pump when being the same, because the vortex pump cavity is less, easily make two-phase too mixed thereby causing the product emulsification when the pumping is high-speed operation, make its follow-up phase splitting difficult.

Therefore, the improvement of the pump system of the non-stirring extraction tank is very important.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a double-pump system for a non-stirring extraction tank.

In order to achieve the above purpose, the utility model provides a technical scheme does:

the double-pump system for the non-stirring extraction tank comprises a pump A (5) and a pump B (7) which are arranged outside the non-stirring extraction tank; the water phase inlet of the pump A (5) is communicated with the water phase pipeline (2), and the water phase outlet of the pump A (5) is communicated with the inlet of the pipeline type mixer (6); an oil phase inlet of the pump B (7) is communicated with the oil phase pipeline (3), and an oil phase outlet of the pump B (7) is communicated with an inlet of the pipeline type mixer (6); the outlet of the pipeline type mixer (6) is communicated with a clarifying chamber of the non-stirring extraction tank.

Preferably, a water phase inlet valve (9) is arranged at the water phase inlet of the A pump (5), and a water phase outlet valve (10) is arranged at the water phase outlet of the A pump (5); an oil phase inlet valve (11) is arranged at an oil phase inlet of the pump B (7), and an oil phase outlet valve (12) is arranged at an oil phase outlet of the pump B (7).

Preferably, the pump A (5) and the pump B (7) are both fixed outside the lower part of the non-stirring extraction tank.

Preferably, the A pump (5) and the B pump (7) are vortex pumps, turbo pumps, centrifugal pumps or magnetic pumps.

The following further description of the present invention:

the two phases of water and oil from the previous stage enter the pipeline mixer uniformly under the action of the A, B pump, the two-phase flow can be respectively controlled by arranging a flowmeter at the inlet of the pump according to actual requirements or arranging 2 variable frequency regulators, and the flow is controlled by regulating the power of the pump (here, the two methods can be selected according to actual requirements of customers). The two phases are fully mixed in the pipeline type mixer and then enter a pre-clarifying chamber for primary clarification, the two phases are slowly led into the clarifying chamber through a phase-splitting uniform flow plate in the tank for secondary phase splitting after the primary clarification, and the steps are repeated until the last stage finishes the whole extraction.

The utility model discloses a 2 pumps, 1 are imported for the oil phase, and 1 is imported for the aqueous phase, and 2 are mixed from required pump entering pipe-line mixer separately respectively mutually, avoid making follow-up phase splitting difficult owing to use 1 pump and the double-phase transition that causes mixes. The oil phase and the water phase are respectively sent into a special pipeline type mixer to be mixed by 2 pumps (the mixer is an integral injection molding part and consists of a plurality of small mixing units, and the flow rate of the two phases entering the mixer is reduced after the cavity is amplified, so that the two phases are uniformly mixed at the position).

Compared with the prior art, the beneficial effects of the utility model are that:

1) energy is saved, and the operation cost is reduced; the mixing time is shortened, the efficiency is improved, the time consumption in unit volume is shorter, and energy is saved inevitably.

2) The double pumps respectively feed two phases to improve the stirring and mixing effect and improve the yield;

3) convenient maintenance, the fault rate is low, and is easy and simple to handle, improve equipment stability.

Drawings

FIG. 1 is a schematic view of a conventional extraction apparatus;

FIG. 2 is a schematic diagram of the structure of an extraction apparatus of a pump in the earlier stage of the utility model;

FIG. 3 is a schematic diagram of a dual pump system for a non-agitated extraction tank.

In the figure: 5. a, a pump; 6. a pipeline mixer; 7. a pump B; 9. a water phase inlet valve; 10. an aqueous phase outlet valve; 11. an oil phase inlet valve; 12. and an oil phase outlet valve.

Detailed Description

Example 1

Referring to fig. 3, the dual pump system for the non-agitated extraction tank includes an a pump 5 and a B pump 7 disposed outside the non-agitated extraction tank; the water phase inlet of the pump A5 is communicated with the water phase pipeline 2, and the water phase outlet of the pump A5 is communicated with the inlet of the pipeline type mixer 6; an oil phase inlet of the pump B7 is communicated with the oil phase pipeline 3, and an oil phase outlet of the pump B7 is communicated with an inlet of the pipeline mixer 6; the outlet of the pipeline type mixer 6 is communicated with a clarifying chamber of the non-stirring extraction tank.

Wherein, a water phase inlet valve 9 is arranged at the water phase inlet of the pump A5, and a water phase outlet valve 10 is arranged at the water phase outlet of the pump A5; an oil phase inlet valve 11 is arranged at an oil phase inlet of the pump B7, and an oil phase outlet valve 12 is arranged at an oil phase outlet of the pump B7. And the pump A5 and the pump B7 are both fixed on the outer side of the lower part of the non-stirring extraction tank. The pump A5 and the pump B7 are vortex pumps, turbine pumps, centrifugal pumps or magnetic pumps.

Example 2 comparison of effects

Carrying out thin film transformation on the medium by taking the mixing chamber of the extraction equipment as 0.1m and carrying out thin film transformation on the medium by taking the clarification chamber as 0.4 m; if the number of stages is 10, the comparison is as follows:

a: dosage of medicament (extraction agent only aspect)

The traditional stirring formula: 0.5m ethanol harvest 30000 × 10 × 150000 nt

The utility model discloses extraction tank: 0.4m ethanol harvest 30000 × 10 × 120000 nt

To obtain: only the medicament is put into the utility model extraction tank in the earlier stage, which saves more than 30000 Yuan compared with the traditional stirring type extraction tank, and the equipment manufacturing investment is not calculated.

B, in the aspect of using effect:

2 sets of 0.37kw turbopumps are used, the frequency of the frequency converter is 20Hz, the oil phase and the water phase are mixed after 2min of operation, and the settling time is 10 min.

Mixing by using a stirring device, wherein a stirring motor is 0.37kw, and the frequency of a stirring frequency converter is 40 Hz; the mixing effect can be achieved only after 5min operation, and the settling time is 20 min.

From the data, the utility model discloses the extraction tank is more than traditional stirring formula extraction tank saving the total economize on electricity and is about 50% -75%, improves whole production efficiency 50% -60%.

C: and (3) later-stage equipment maintenance:

the traditional stirring extraction tank belongs to the maintenance project type: the stirring motor, the belt pulley, the stirring bearing, the stirring connecting rod and the belt; wherein the belt is a common worn article.

② the utility model discloses extraction tank maintenance project type does: 2 pumps; the pipeline mixer is an injection molding part and is rarely damaged;

the above data show that: the extraction tank is superior to the traditional stirring extraction equipment in the aspects of equipment investment and use performance.

Claims

1. A dual pump system for a non-agitated extraction tank, characterized in that the dual pump system comprises a pump a (5) and a pump B (7) disposed outside the non-agitated extraction tank; the water phase inlet of the pump A (5) is communicated with the water phase pipeline (2), and the water phase outlet of the pump A (5) is communicated with the inlet of the pipeline type mixer (6); an oil phase inlet of the pump B (7) is communicated with the oil phase pipeline (3), and an oil phase outlet of the pump B (7) is communicated with an inlet of the pipeline type mixer (6); the outlet of the pipeline type mixer (6) is communicated with a clarifying chamber of the non-stirring extraction tank.

2. The dual pump system for a non-agitated extraction tank as in claim 1, wherein the aqueous phase inlet of the A pump (5) is provided with an aqueous phase inlet valve (9), and the aqueous phase outlet of the A pump (5) is provided with an aqueous phase outlet valve (10); an oil phase inlet valve (11) is arranged at an oil phase inlet of the pump B (7), and an oil phase outlet valve (12) is arranged at an oil phase outlet of the pump B (7).

3. The dual pump system for a non-agitated extraction tank of claim 1 or 2, wherein the A pump (5) and the B pump (7) are fixed to the outside of the lower part of the non-agitated extraction tank.

4. The dual pump system for a stirless extractor tank of claim 1 or 2, wherein the a pump (5) and the B pump (7) are vortex pumps, turbo pumps, centrifugal pumps or magnetic pumps.