CN220758046U - Multipurpose high-efficient low temperature evaporation concentration crystallization equipment - Google Patents

Abstract

The utility model discloses multipurpose high-efficiency low-temperature evaporation concentration crystallization equipment, which adopts an evaporator assembly, a stirrer assembly and an ice pushing device to work cooperatively and has high evaporation efficiency; each liquid guide heat exchange tube is internally provided with a spiral brush type stirring rod, a hairbrush with a spiral side surface can be more attached to the inner wall of the tube and can not scratch the inner wall of the liquid guide heat exchange tube, an upper tube orifice and a lower tube orifice can be used as an outlet and an inlet for exchange, the liquid guide heat exchange tubes can be downwards pressed by gravity from the upper part if the concentration is high, the liquid guide heat exchange tubes can be upwards purified from the lower part if the concentration is low, and ice slurry ice particles in water liquid can be upwards scraped and pushed by the spiral design of the stirring rod, so that ice crystals in the liquid can be better separated; in addition, the variable frequency motor can drive a plurality of chain wheels to drive a plurality of stirring rods to rotate, the driving mode can be chain linkage, and can also be combination of a belt and a belt pulley, so that the variable frequency motor is flexible and changeable, has high applicability and is suitable for various equipment and units.

Description

Multipurpose high-efficient low temperature evaporation concentration crystallization equipment

Technical Field

The utility model belongs to the technical field of ice storage and refrigeration, and particularly relates to multipurpose efficient low-temperature evaporation concentration crystallization equipment.

Background

Existing evaporation treatment techniques fall into two categories:

1. the liquid material is in a boiling state and needs to be operated under a higher temperature condition, or the boiling point of water is reduced by keeping a certain vacuum degree, so that on one hand, a large amount of steam or electric power is required to be consumed, and on the other hand, the industrial wastewater and domestic garbage percolate with high salt content and acid and alkali content often contain a large amount of corrosive pollutants, the equipment corrosion risk is increased under the high temperature condition, and meanwhile, a large amount of smoke and toxic gas generated in the severe evaporation process cause the ecological environment to be greatly polluted, so that the environmental protection problem is more serious. In order to ensure continuous and stable operation of the equipment, more expensive metal materials are required to be selected, and meanwhile, more strict softening pretreatment is carried out on the wastewater, so that the investment cost and the operation cost of the evaporation system are high. Multiple effect evaporation (Multiple EffectDistillation, abbreviated MED) and vapor recompression evaporation treatment techniques (Mechanical VaporRecompression, abbreviated MVR) are currently in widespread use. With the progress of evaporation process, high salt waste liquid concentration gradually rises, and when crystals begin to precipitate after saturation, a series of problems such as pipeline blockage and pipeline scaling can occur, and most of the concentrated waste liquid is discharged before the process, so that the subsequent treatment is performed. The concentrated solution treatment is a problem which is necessary to face in the evaporation field, and special crystallization equipment is available at present for salt crystallization, but the mixture of organic matters and salt is generally complex, and the general concentrated crystallization and centrifugal dehydration are difficult to meet the requirements or cause corrosion, fouling and the like. The evaporation rate of a liquid is mainly affected by the temperature of the liquid, the contact area of the liquid with the gas phase, the air flow rate of the liquid surface, and the like, in addition to its own physical properties. The prior multi-effect evaporation and MVR generally adopt a large-area heat exchanger made of metal for heating materials and condensing damp and hot air, and even if corrosion and scaling factors are not considered, the metal heat exchanger is adopted for indirect heat exchange, and the heat exchange efficiency is always limited, so that the heating and condensing efficiency is affected. For some sewage with low viscosity and salt content in water not being difficult to crystallize, the existing evaporation technology can be conveniently operated, but if the organic matters in the water are more and concentrated to a certain concentration, strong brine with high viscosity is formed, evaporation and condensation are difficult to carry out at the moment, and if the sewage cannot be reasonably treated, the evaporator, the heat exchanger and the pipeline are easily blocked.

2. And (3) freezing, concentrating and purifying, wherein in a refrigeration mode, the compressor can compress refrigerant steam. The refrigerant vapor may be directed into a condenser, condensed into liquid refrigerant. The liquid refrigerant may be directed into the evaporator through an expansion device, thereby forming a two-phase refrigerant mixture and being reduced in temperature. In the evaporator, the refrigerant may exchange heat with a process fluid, such as air or water. The heat exchanger may include various types and configurations. In some HVAC systems, such as cooling devices, the heat exchanger typically used is a shell and tube heat exchanger. Shell and tube heat exchangers typically have a configuration with built-in piping within the shell. The housing portion and the conduit portion are typically configured in heat exchange relationship and carry two different fluids. For example, in an evaporator, the housing portion may be configured to carry a refrigerant and the tube portion may be configured to carry a process fluid such as water. The refrigerant may exchange heat with the process fluid to adjust the temperature of the process fluid. For heat exchangers operating as evaporators, the shell-and-tube heat exchangers generally used can be falling-film evaporators or flooded evaporators. However, the technology has great limitation, and the temperature of the material cannot be reduced rapidly and effectively, because once the temperature is reduced to minus, the material is easy to freeze, so that equipment and pipelines are blocked, the equipment is damaged, the efficiency of heat exchange between the refrigerant and the process fluid of the evaporator used in the prior art can be improved, and therefore, the technology research and improvement on the low-temperature evaporation concentration crystallization equipment are needed, and the defects are overcome.

Disclosure of Invention

In order to solve the problems, the utility model discloses multipurpose high-efficiency low-temperature evaporation concentration crystallization equipment, which can separate the refrigerant and process fluid aiming at low concentration and consistency and improves the heat exchange efficiency of the refrigerant and the process fluid.

The liquid distribution is even, the cooling is sufficient, the ice making speed is high, the energy efficiency is good, the ice slurry discharging is smooth and quick, and the working efficiency is high.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a multipurpose high-efficiency low-temperature evaporation concentration crystallization device comprises an evaporator and a stirring component,

the evaporator is of a vertical cylindrical structure, the periphery of the evaporator is provided with an evaporator barrel body, a transmission case, an upper space, a heat exchange cavity and a lower space are arranged in the evaporator barrel body from top to bottom, one side of the upper space is provided with a first pipe orifice, one side of the lower space is provided with a second pipe orifice, ice pushing devices are arranged in the upper space and the lower space, a plurality of vertical liquid guide heat exchange pipes are arranged in the heat exchange cavity, a refrigerant liquid inlet pipe is arranged below the side of the heat exchange cavity, a refrigerant liquid outlet pipe is arranged above the side of the heat exchange cavity,

the stirring assembly comprises a power output assembly and spiral brush type stirring rods, the power output assembly is 1-30 groups, each group of power output assembly comprises a variable frequency motor, a plurality of chain wheels, a chain and a tensioner, the chain wheels are arranged into a circle and are connected with each other through the chain, the variable frequency motor is arranged above the evaporator barrel body, the variable frequency motor is connected with any one of the chain wheels, the 1-30 groups of power output assemblies form a circle which is sequentially unfolded in a transmission case, the spiral brush type stirring rods are fixed below the chain wheels, and the spiral brush type stirring rods are inserted into the liquid guide heat exchange tube.

As an improvement of the utility model, the heat preservation cotton is arranged in the outer interlayer of the evaporator barrel body.

As an improvement of the utility model, the outer side of the spiral brush type stirring rod is provided with bristles which are spirally arranged.

As an improvement of the utility model, the upper end and the lower end of the liquid-guiding heat exchange tube are embedded with anti-wear sleeves, and the spiral brush type stirring rod is provided with stirring paddles.

As an improvement of the utility model, the ice pushing device comprises a servo motor and an auger, wherein the servo motor is connected with the auger, and an outlet of the auger is communicated with the first pipe orifice or the second pipe orifice.

As an improvement of the utility model, each circle of chain wheel transmission assembly is provided with a tensioner.

As an improvement of the utility model, the side surface of the evaporator barrel body is provided with a refrigerant liquid level sensing switch, a pressure safety valve and a refrigerant liquid level observation port.

As an improvement of the utility model, a flow induction switch is arranged at the first pipe orifice or the second pipe orifice.

As an improvement of the utility model, the upper part of the transmission case is provided with an oil filling hole.

As an improvement of the utility model, a low-temperature-resistant sealing ring is arranged at the joint of the spiral brush type stirring rod on the transmission case.

The beneficial effects of the utility model are as follows:

1. the evaporator assembly, the stirrer assembly and the ice pushing device are adopted in the working process, and simultaneously work cooperatively, so that the evaporation efficiency is good, the discharging is smooth, and the speed is high;

2. each heat conduction heat exchange tube is internally provided with a spiral brush type stirring rod, and a brush with a spiral side surface can be more adhered to the inner wall of the liquid flow hole without scratching the inner wall of the liquid conduction heat exchange tube, so that the heat exchange effect is good, the liquid conduction efficiency is higher, the spiral design of the heat conduction heat exchange tube is better to scrape and push (or downwards) ice slurry and ice particles in the water liquid, the separation effect is good, and the ice slurry discharging speed is high;

3. the first pipe orifice or the second pipe orifice can be used as an outlet and an inlet, and can be turned downwards from above if the concentration is high, the variable frequency motor is regulated to reversely rotate, so that the spiral brush type stirring rod reversely operates, materials are pushed downwards by utilizing the principle of reverse spiral arrangement of the spiral brush type stirring rod, pushing of stirring slurry and multiple actions of pushing downwards by gravity, and ice slurry and ice particles in water liquid can be scraped upwards by the spiral design of the stirring rod if the concentration is low;

4. the anti-abrasion sleeves are embedded at the upper end and the lower end of the liquid-guiding heat exchange tube, the spiral brush type stirring rod is restrained and can only rotate along the axis, and the inner wall of the liquid-guiding heat exchange tube cannot be scratched during working;

5. the variable frequency motor can drive the plurality of chain wheels to drive the plurality of stirring rods to rotate, the driving mode can be chain linkage, or combination of a belt and a belt pulley, and the variable frequency motor is flexible, variable, high in applicability, simple in structure and applicable to various equipment and units;

6. the oil filling hole is arranged above the transmission case, and lubricating oil can be selectively and properly added, so that the working state of parts is better, rust is not easy to occur, the lubricating effect is good, the abrasion is small, the system faults are few, and the maintenance rate is low;

7. the liquid refrigerant is filled in the liquid-guiding heat exchange tube, so that the outer wall of the liquid-guiding heat exchange tube is in full contact with the refrigerant, and the heat exchange efficiency is high.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic diagram of a power take-off assembly according to the present utility model.

Fig. 3 is a schematic view of a heat exchange tube according to the present utility model.

Fig. 4 is a schematic view of a spiral brush type stirring rod according to the present utility model.

Fig. 5 is a view of the wear sleeve and bristle set of the present utility model.

Fig. 6 is a schematic diagram of a drive system in the form of a pulley according to the present utility model.

List of drawing identifiers:

1. the device comprises an evaporator, 2, a stirring assembly, 3, an evaporator barrel body, 4, a transmission case, 5, an upper space, 6, a heat exchange cavity, 7, a lower space, 8, a first pipe orifice, 9, a second pipe orifice, 10, an ice pushing device, 11, a liquid guide heat exchange pipe, 12, a refrigerant liquid inlet pipe, 13, a refrigerant liquid outlet pipe, 14, a power output assembly, 15, a spiral brush stirring rod, 16, a variable frequency motor, 17, a chain wheel, 18, a chain, 19, heat insulation cotton, 20, bristles, 21, an anti-wear sleeve, 22, a servo motor, 23, an auger, 24, a tensioner, 25, a refrigerant liquid level sensing switch, 26, a pressure safety valve, 27, a refrigerant liquid level observation port, 28, a flow sensing switch, 29, an oiling hole, 30, a low temperature resistant sealing ring, 31 and stirring slurry.

Detailed Description

The present utility model is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the utility model and not limiting the scope of the utility model.

As shown in the figure, the multipurpose high-efficiency low-temperature evaporation concentration crystallization device comprises an evaporator 1, a stirring assembly 2, an evaporator barrel body 3, a transmission case 4, an upper space 5, a heat exchange cavity 6 and a lower space 7,

the evaporator 1 is of a vertical cylindrical structure, the periphery of the evaporator 1 is provided with an evaporator barrel body 3, the evaporator barrel body 3 is provided with a transmission case 4, an upper space 5, a heat exchange cavity 6 and a lower space 7 from top to bottom, one side of the upper space 5 is provided with a first pipe orifice 8, one side of the lower space 7 is provided with a second pipe orifice 9, the upper space 5 and the lower space 7 are respectively internally provided with an ice pushing device 10, the heat exchange cavity 6 is internally provided with a plurality of vertical liquid guide heat exchange pipes 11, the side lower part of the heat exchange cavity 6 is provided with a refrigerant liquid inlet pipe 12, the side upper part of the heat exchange cavity 6 is provided with a refrigerant liquid outlet pipe 13,

the stirring assembly 2 comprises a power output assembly 14 and a spiral brush type stirring rod 15, the power output assembly is 1-30 groups, each group of power output assembly 14 comprises a variable frequency motor 16, a plurality of chain wheels 17, a chain 18 and a tensioner 24, the chain wheels 17 are arranged into a circle and are connected through the chain 18, the variable frequency motor 16 is arranged above the evaporator barrel 3, the variable frequency motor 16 is connected with one of the chain wheels 17, the 1-30 groups of power output assemblies 14 form a circle which is sequentially unfolded in the transmission case 4, the spiral brush type stirring rod 15 is fixed below the chain wheels 17, and the spiral brush type stirring rod 14 is inserted into the liquid guide heat exchange tube 11.

According to the utility model, hundreds of liquid guide heat exchange pipes 11 are arranged in the heat exchange cavity 6, as shown in fig. 3, hundreds of corresponding spiral brush type stirring rods 15 are inserted into each liquid guide heat exchange pipe 11, and hundreds of motors are used for driving the stirring rods to rotate, so that the stirring assembly 2 is designed, the stirring assembly 2 comprises 1-30 groups of power output assemblies 14, as shown in fig. 2, each group of power output assemblies 14 comprises a variable frequency motor 16, a plurality of chain wheels 17, a chain 18 and a tensioning wheel, the plurality of chain wheels 17 are arranged into a circle, the chain wheels 18 are connected with each other, the variable frequency motor 16 is arranged above the evaporator barrel 3, the variable frequency motor 16 only needs to drive any one of the chain wheels 17 to rotate, and then the spiral brush type stirring rods 15 are driven to rotate, and thus the 1-30 groups of power output assemblies 14 can drive the hundreds of spiral brush type stirring rods 15 to rotate, and the 1-30 groups of power output assemblies 14 form a circle which is unfolded in sequence in the transmission box 4, and the 10 groups of variable frequency motors 16 can be placed above the evaporator barrel 3.

Under normal conditions, cold-carrying liquid (namely ice-making water) enters the upper space 5 from the first pipe orifice 8, the cold-carrying liquid flows downwards from the plurality of liquid guide heat exchange pipes 11 after entering, the cavity outside the heat exchange liquid guide pipe 11 is filled with refrigerant, cold and heat are continuously exchanged in the process of the cold-carrying liquid flowing downwards, and the spiral brush type stirring rod 15 is additionally used for continuously stirring, so that the cold-carrying liquid rapidly and uniformly refrigerates to form ice slurry (at the moment, the ice slurry is not ice cubes, and the ice slurry must be flowable, otherwise, the ice slurry cannot flow in the liquid flow hole 11), finally falls into the lower space 7, and the auger starts to push the ice slurry out of the second pipe orifice 9, and then the next procedure is carried out.

The above-mentioned situation is to the high consistency from top to bottom, under the action of gravity force to push down, if meet the low need purify of concentration, from bottom to top, the first mouth of pipe 8 or the second mouth of pipe 9 of the utility model can be regarded as export and import can be exchanged, change the second mouth of pipe 9 into carrying the cold liquid import, change the first mouth of pipe 8 into the fluid outlet, the inverter motor 16 reverses, because the ice is more than the specific gravity of water, so let the brush hair 20 of the side of the spiral brush puddler 15 scrape the ice sediment or ice particle in the tube wall after it can float upwards along with the buoyancy of water, the spiral design of puddler 15 can better scrape the ice slurry ice particle in the water liquid upwards, so the ice crystal in the better separation liquid.

The utility model adopts the evaporator assembly, the stirrer assembly and the ice pushing device to work when in ice storage and refrigeration, and simultaneously works cooperatively, thus having good evaporation efficiency, smooth discharging and high speed; the spiral brush type stirring rod 15 is made of high-strength and corrosion-resistant copper, iron and aluminum materials or composite metals or other composite materials, and is firm, durable, stable in performance and low in maintenance rate; the outer side of the spiral brush type stirring rod 15 is provided with bristles 20, and the bristles 20 are arranged in a spiral manner, as shown in fig. 4, so that the spiral brush type stirring rod has good pushing and stirring effects on water flow and semi-fluid, and can effectively stir the water flow to push ice slurry to move.

Because the liquid flowing hole 11 is approximately 1m long, the spiral brush type stirring rod 15 is easy to shake and bend and deform during rotation, the whole equipment is basically scrapped as soon as the liquid flowing hole 11 is worn out, and in order to prevent the situation, the ceramic anti-abrasion sleeve 21 is embedded at the lower end of the upper end of the liquid flowing hole 11, as shown in fig. 4 and 5, the spiral brush type stirring rod is restrained to rotate only along the axis, and the inner wall of the liquid flowing hole cannot be scratched during operation.

The chain wheels 17 are driven by the variable frequency motor 16, the variable frequency motor 16 can control the stirring speed and the rhythm of the stirring rod, so that the best operation condition is achieved, and similarly, the auger is connected with the servo motor 22, so that the operation speed and the ice pushing rhythm of the auger can be controlled, and the production beat is ensured. In addition, a flow sensing switch 28 can be arranged at the first pipe orifice 8 or the second pipe orifice 9 (ice outlet), so as to monitor the amount of ice slurry.

The heat exchange tube is filled with liquid refrigerant, can operate various types of refrigerant, and has good compatibility and wide application.

Because the utility model is an ice making device and is very cold, the heat preservation cotton 19 is arranged in the outer interlayer of the evaporator barrel body 3, so that an operator is not frosted, and cold air is not discharged.

The side surface of the evaporator barrel body 3 is provided with the refrigerant liquid level sensing switch 25, the pressure safety valve 26 and the refrigerant liquid level observation port 27, so that the operation condition of the equipment can be effectively monitored during the operation of the equipment, the loss of cold energy is small, the energy is saved, the emission is reduced, and the equipment is convenient and safe.

In order to ensure the normal operation of the stirring assembly 2, the sprocket 17 needs to be constantly refueled and maintained, the utility model is provided with the refueled hole 29 above the transmission case 4, and lubricating oil can be properly added, so that the working state of parts is better, rust is not easy to occur, the lubricating effect is good, the abrasion is small, the system failure is less, the maintenance rate is low, and in addition, the low-temperature-resistant sealing ring 30 is arranged at the outlet of the stirring rod on the transmission case 4, so that oil leakage is avoided.

It should be noted that the foregoing merely illustrates the technical idea of the present utility model and is not intended to limit the scope of the present utility model, and that a person skilled in the art may make several improvements and modifications without departing from the principles of the present utility model, which fall within the scope of the claims of the present utility model.

Claims (10)

1. A multipurpose high-efficient low temperature evaporation concentration crystallization equipment which characterized in that: comprises an evaporator (1) and a stirring assembly (2), the evaporator (1) is of a vertical cylindrical structure, an evaporator barrel body (3) is arranged on the periphery of the evaporator (1), a transmission box (4), an upper space (5), a heat exchange cavity (6) and a lower space (7) are arranged from top to bottom, a first pipe orifice (8) is arranged on one side of the upper space (5), a second pipe orifice (9) is arranged on one side of the lower space (7), ice pushing devices (10) are arranged in the upper space (5) and the lower space (7), a plurality of vertical liquid guide heat exchange pipes (11) are arranged in the heat exchange cavity (6), a refrigerant liquid inlet pipe (12) is arranged below the side of the heat exchange cavity (6), a refrigerant liquid outlet pipe (13) is arranged above the side of the heat exchange cavity (6), the stirring assembly (2) comprises a power output assembly (14) and a spiral brush stirring rod (15), the power output assembly is in a 4-10 group, each group of power output assemblies (14) comprises a variable frequency motor (16) and a plurality of chain wheels (17), the variable frequency motors (17) are arranged between each other to form a plurality of variable frequency motors (16) which are connected with one another through a chain wheel (16) and are connected with one another in a circular barrel body (16), the 4-10 groups of power output components (14) form a circle which is sequentially unfolded in the transmission case, the spiral brush type stirring rod (15) is fixed below the chain wheel (17), and the spiral brush type stirring rod (15) is inserted into the liquid guide heat exchange tube (11).

2. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: and heat preservation cotton (19) is arranged in the outer interlayer of the evaporator barrel body (3).

3. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: the outer side of the spiral brush type stirring rod (15) is provided with bristles (20), and the bristles (20) are spirally arranged.

4. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: the upper end and the lower end of the liquid-guiding heat exchange tube (11) are embedded with anti-wear sleeves (21).

5. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: the ice pushing device (10) comprises a servo motor (22) and an auger (23), wherein the servo motor (22) is connected with the auger (23), and an outlet of the auger (23) is communicated with the first pipe orifice (8) or the second pipe orifice (9).

6. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: a tensioner (24) is arranged on each circle of chain wheel (17) transmission assembly.

7. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: the side surface of the evaporator barrel body (3) is provided with a refrigerant liquid level sensing switch (25), a pressure safety valve (26) and a refrigerant liquid level observation port (27).

8. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: a flow induction switch (28) is arranged at the first pipe orifice (8) or the second pipe orifice (9).

9. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: and an oil filling hole (29) is arranged above the transmission case (4).

10. The multipurpose high-efficiency low-temperature evaporation concentration crystallization device according to claim 1, wherein: the connection part of the spiral brush type stirring rod (15) on the transmission case (4) is provided with a low-temperature-resistant sealing ring (30).