CN218107679U - KCl evaporation salting production device - Google Patents

Abstract

The utility model provides a KCl evaporation salting production device, which comprises a feed pump, a feed preheater, a heating chamber, an evaporation crystallization chamber, a circulating pump and a salt collecting tank; the feeding pump, the feeding preheater and the heating chamber are sequentially connected, and a material outlet of the heating chamber is connected with a feeding hole of the evaporative crystallization chamber; a steam outlet of the evaporation crystallization chamber is connected with a heating medium inlet of the feeding preheater, a crystal outlet of the evaporation crystallization chamber is connected with the salt collecting tank, and a circulating material outlet of the evaporation crystallization chamber is connected with an inlet of the circulating pump; the outlet of the circulating pump is connected with the feed inlet of the heating chamber; a vibration descaling mechanism is arranged in the gap of the outer wall of the heating pipe of the heating chamber, and the vibration descaling mechanism comprises a plurality of vibrating rods and vibrating motors arranged at two ends of the plurality of vibrating rods. The utility model discloses an among the device has solved current evaporation crystallization device, because of the solution evaporation crystallization leads to the heating pipe inner wall scale deposit to and device heat exchange efficiency reduces, the handling capacity reduces, blocks up the heating pipe and the high problem of the mediation cleaning frequency of stopping the transport.

Description

KCl evaporation salting production device

Technical Field

The utility model relates to a potassium chloride production technical field especially relates to a KCl evaporation salting apparatus for producing.

Background

Because of the abundant mineral resources, simple production method, high potassium content, low cost and the like, the potassium chloride is still the most main potassium fertilizer variety in the world so far, and accounts for more than 90 percent of the total sale amount of the global potassium fertilizer, wherein 50 percent of the potassium chloride can be directly applied, and the rest is mainly used for manufacturing the compound fertilizer. The potassium chloride is an important fertilizer required by the growth of plants, the fertilizer efficiency is high, the potassium chloride can be absorbed by soil and is not easy to run off, and by applying a proper amount of potassium fertilizer, the stems of the crops can grow firmly, lodging is prevented, flowering and fruiting are promoted, and the capabilities of resisting drought, cold and diseases and insect pests are enhanced, so that the potassium chloride has very important significance for agricultural high yield. In the potassium chloride fertilizer, the content of potassium chloride is generally more than 90-95%, wherein K ₂ O content is about 60-63%, chlorine (Cl) content is about 47.6%, and in addition, small amount of sodium, calcium, magnesium, bromine and sulfate radical are contained, which is hygroscopic, easy to agglomerate and easy to dissolve in water. The pure potassium chloride is white or light yellow cubic crystal.

Meanwhile, potassium chloride is also an important inorganic composite salt in the industry, and the industrial demand is increasing day by day, so that a larger potassium chloride salt crystal gap appears, and a large-scale continuous production method is urgently needed for relieving the defect. In consideration of the treatment capacity and evaporation capacity of potassium chloride and the condition that the solubility of the potassium chloride does not change greatly along with the temperature, the potassium chloride is separated by cooling and crystallizing, and the problems of unobvious crystal precipitation, low product purity, low production efficiency and incapability of continuous production exist.

The evaporative crystallization process is to make the solution reach a saturated state and then reach a supersaturated state through the loss (i.e. evaporation) of the solvent, and at a certain temperature, the mass of a certain solute which can be dissolved by a certain amount of water (or the solvent) is limited, so that the excessive solute can be separated out along with the reduction of the solvent, namely crystallization. However, in the existing evaporative crystallization device, whether natural circulation or forced circulation, the situation that the inner wall of a heating pipe of a heating chamber of the device is scaled due to evaporative crystallization of a solution exists, salt scale on the inner wall of the heating pipe not only affects the heat exchange efficiency and the evaporation effect of the heating pipe, but also blocks the heating pipe due to long-time scaling, and the salt scale on the inner wall of the heating pipe is not easy to clean, so that the dredging and cleaning frequency is high, and the dredging and cleaning can cause the shutdown of the device and the reduction of the production and treatment capacity.

SUMMERY OF THE UTILITY MODEL

The utility model provides a KCl evaporation salting apparatus for in solving current evaporation crystallization device, because solution evaporation crystallization leads to the heating pipe inner wall scale deposit, and then the heat exchange efficiency who leads to the device reduces, the handling capacity reduces, blocks up the heating pipe and the problem that the abluent frequency of stoppage in transit mediation is high.

The utility model provides a KCl evaporation salting apparatus for producing, include: the system comprises a feed pump, a feed preheater, a heating chamber, an evaporation crystallization chamber, a circulating pump and a salt collecting tank; the feed pump, the feed preheater and the feed inlets at the lower parts of the heating chambers are sequentially connected through feed pipelines, and the material outlet at the top of the heating chamber is connected with the feed inlet of the evaporative crystallization chamber.

Specifically, a steam outlet at the top of the evaporation crystallization chamber is connected with a heating medium inlet of the feed preheater, a crystal outlet at the bottom of the evaporation crystallization chamber is connected with the salt collecting tank, and a circulating material outlet at the lower part of the evaporation crystallization chamber is connected with an inlet of a circulating pump; the outlet of the circulating pump is connected with the feed inlet of the heating chamber; and a heating medium outlet of the feed preheater is discharged to the recovery tank through a cold water pipeline.

Specifically, a vibration descaling mechanism is arranged in a gap between the outer walls of heating pipes of the heating chamber, and comprises a plurality of vibrating rods penetrating through the heating chamber and vibrating motors arranged at two ends of the vibrating rods; the vibration motor is disposed outside the heating chamber.

Specifically, a feed inlet of the evaporation crystallization chamber is arranged in the tangential direction of a cylinder of the evaporation crystallization chamber, and a material outlet at the top of the heating chamber is tangentially connected with the evaporation crystallization chamber through a pipeline.

Specifically, a pressure filter is arranged between the evaporation crystallization chamber and the salt collecting tank; the feed inlet of the pressure filter is connected with the crystal outlet at the bottom of the evaporation crystallization chamber, the mother liquor outlet of the pressure filter is connected with the material inlet of the feed preheater, and the crystallization outlet pipe of the pressure filter is connected with the salt collecting tank.

Specifically, a defoaming screen plate is arranged below a steam outlet of the evaporative crystallization chamber, and an anti-blocking spray pipe is arranged above the defoaming screen plate.

Specifically, the lower part of the evaporation crystallization chamber is of an inverted cone structure, and the taper is 45-60 degrees.

Specifically, an automatic scale cleaning structure is arranged in the heating chamber and comprises a spring bracket, a spring, a limiting clamping plate and a cleaning spiral steel wire; one end of the spring is fixedly connected with the spring bracket, the other end of the spring is fixedly connected with one end of the limiting clamping plate, and the other end of the limiting clamping plate is connected with one end of the cleaning spiral steel wire; the spring support is fixedly connected with the lower part of the heating chamber and is arranged above the feeding hole of the heating chamber; the spring and the limiting clamping plate are arranged outside the heating pipe of the heating chamber, and the cleaning spiral steel wire extends into the heating pipe; the spring, the limiting clamping plate and the cleaning spiral steel wire are arranged in one-to-one correspondence with the heating pipes.

Specifically, the width of the end part of the limiting clamping plate connected with the spring is 1.1-1.5 times of the outer diameter of the heating pipe, and the length of the limiting clamping plate is 50-100mm.

Specifically, the length of the cleaning spiral steel wire is 200-500mm shorter than that of the heating pipe, and the outer diameter of the cleaning spiral steel wire is 0.7-0.9 times of the inner diameter of the heating pipe.

The utility model provides a KCl evaporation salting apparatus for producing can realize the serialization production of potassium chloride, and the circulation heating evaporation can promote evaporation crystallization efficiency for the handling capacity improves by a wide margin, and device operating stability is high, solves the problem that potassium chloride purity is low, output is low, manufacturing cost is high and production efficiency is low, improves economic benefits.

The utility model provides a KCl evaporation salting apparatus for producing utilizes vibration descaling mechanism and automatic scale cleaning structure in production operation, can avoid heating pipe inner wall scale deposit and frequent jam, reduces the device and stops moving and dredge abluent frequency, improves heat exchange efficiency for the feed liquid supersaturation is even, and crystal grain size distribution is good, and the device energy consumption is low, and the trouble takes place fewly, and the exogenous steam quantity is few, has realized high efficiency continuity crystallization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a KCl evaporation salt-separation production device provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a vibration descaling mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a KCl evaporation salt-separation production device according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an automatic descaling structure according to an embodiment of the present invention.

Description of the reference numerals:

1. the device comprises a feeding pump, 2, a feeding preheater, 3, a heating chamber, 4, an evaporation crystallization chamber, 5, a circulating pump, 6, a salt collecting tank, 7, a filter press, 31, a vibrating rod, 32, a vibrating motor, 33, a spring support, 34, a spring, 35, a limiting clamping plate, 36, a cleaning spiral steel wire, 41, a defoaming screen plate and 42, and an anti-blocking spray pipe.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts also belong to the protection scope of the present invention.

As shown in figure 1, the utility model provides a KCl evaporation salting production device, include: a feeding pump 1, a feeding preheater 2, a heating chamber 3, an evaporation crystallization chamber 4, a circulating pump 5 and a salt collecting tank 6; the feed pump 1, the feed preheater 2 and the feed inlets at the lower parts of the heating chamber 3 are sequentially connected through feed pipelines, and a material outlet at the top of the heating chamber 3 is connected with a feed inlet of the evaporative crystallization chamber 4.

Specifically, a steam outlet at the top of the evaporation crystallization chamber 4 is connected with a heating medium inlet of the feed preheater 2, a crystal outlet at the bottom of the evaporation crystallization chamber 4 is connected with a salt collecting tank 6, and a circulating material outlet at the lower part of the evaporation crystallization chamber 4 is connected with an inlet of a circulating pump 5; the outlet of the circulating pump 5 is connected with the feed inlet of the heating chamber 3; the heating medium outlet of the feed preheater 2 is discharged to the recovery tank through a cold water pipeline.

The heating chamber 3 using exogenous steam is arranged to evaporate the feed liquid containing KCl, so that the feed liquid can be conveniently crystallized and separated in the evaporative crystallization chamber 4; utilize 4 exhaust secondary steam of evaporative crystallization room to preheat the feeding in the feeding preheater 2, can recycle the waste heat, the energy saving avoids the heat loss, can preheat the feeding in advance again, can reduce the heat source demand and the exogenous steam consumption of heating chamber 3, reduction in production cost.

Set up circulation heating between evaporation crystallization room 4 and heating chamber 3, can carry out the repeated evaporation to the feed liquid that contains the tiny crystal in the evaporation crystallization room 4 for the tiny crystal can grow into the crystal of great granule at the circulation in-process, and convenient the recovery can also utilize the circulation feed liquid to regulate and control the safe, stable, efficient operation of a whole set of KCl evaporation salting-out apparatus for producing.

As shown in fig. 2, in particular, a vibration descaling mechanism is arranged in the gap of the outer wall of the heating pipe of the heating chamber 3, and the vibration descaling mechanism comprises a plurality of vibrating rods 31 penetrating through the heating chamber 3, and a vibration motor 32 arranged at two ends of the plurality of vibrating rods 31; the vibration motor 32 is provided outside the heating chamber 3.

It should be noted that, the number of the vibrating rods 31 is set according to the number of the heating pipes, the present invention is not limited to this, and one or more vibrating rods 31 may be arranged in parallel in the gap of each row of heating pipes, or one or more vibrating rods 31 may be arranged in parallel in the gap of the heating pipe bundle composed of several rows of heating pipes.

Set up vibration descaling mechanism in the clearance of the heating pipe of heating chamber 3, wherein vibrating motor 32 can control vibrating arm 31 and continuously or vibrate intermittently, if the reinforced volume appears undulant or heating chamber 3 temperature control too high and cause the feed liquid supersaturation in heating chamber 3 and when the crystallization in the heating pipe, can in time vibrate the crystal on the heating pipe inner wall and drive away, improve the cleanliness factor of heating pipe, effectively prevent heating pipe inner wall scale deposit jam, be favorable to improving the heat exchange efficiency of heating chamber 3, the live time of extension heating pipe, the frequency that the reducing means shut down and dredge the washing heating pipe, and the production cost is reduced.

Specifically, the feed inlet of the evaporation crystallization chamber 4 is arranged in the tangential direction of the cylinder of the evaporation crystallization chamber 4, and the material outlet at the top of the heating chamber 3 is tangentially connected with the evaporation crystallization chamber 4 through a pipeline.

The feed inlet of the existing evaporation crystallization chamber 4 vertically extends into the evaporation crystallization chamber 4, and during the falling process of potassium chloride crystals, salt scale is easily formed by deposition on the built-in feed pipe and the feed inlet, and the blockage of an output pipeline is easily caused after the large-block salt scale falls off, so that the stable production of the device is not facilitated. The utility model discloses in, evaporation crystallization chamber 4 adopts the mode of tangential feeding for heating chamber 3 exhaust saturated potassium chloride feed liquid is along the rotatory feeding of barrel, because the inside of evaporation crystallization chamber 4 is unimpeded, and the barrel inner wall is constantly washed away by the feeding again, therefore is difficult for forming the salt scale in evaporation crystallization chamber 4, and after a large amount of evaporation of moisture, made things convenient for supersaturated solution to crystallize in the lower part of evaporation crystallization chamber 4, prolonged the production cycle of device.

As shown in fig. 3, specifically, a filter press 7 is further arranged between the evaporative crystallization chamber 4 and the salt collecting tank 6; the feed inlet of the pressure filter 7 is connected with the crystal outlet at the bottom of the evaporation crystallization chamber 4, the mother liquor outlet of the pressure filter 7 is connected with the material inlet of the feed preheater 2, and the crystallization outlet pipe of the pressure filter 7 is connected with the salt collecting tank 6.

The heated feed liquid is evaporated, crystallized and separated in the evaporation crystallization chamber 4, potassium chloride crystals with large and uniform particles can grow and deposit at the bottom of the evaporation crystallization chamber 4, the part of potassium chloride crystals are sent into the filter press 7 for solid-liquid separation, potassium chloride crystallization products with high purity and low water content can be obtained, mother liquor separated by the filter press 7 is sent into the feeding preheater 2 for circulation and evaporation, the residual potassium chloride in the mother liquor can be crystallized and recovered again, and the potassium chloride can be recovered to the maximum extent.

Specifically, a defoaming screen plate 41 is arranged below a steam outlet of the evaporation crystallization chamber 4, and an anti-blocking spray pipe 42 is arranged above the defoaming screen plate 41.

The utility model discloses in, the secondary steam that will evaporate 4 productions in crystallization room is used for the feeding to preheat, this is an example of secondary steam's recycle, and this part secondary steam can also be used for heating for the equipment or the material of other workshop sections, when other equipment to secondary steam's the defoaming requirement when higher, set up in evaporation crystallization room 4 and remove foam otter board 41 and can further remove foam and clean to secondary steam, is favorable to secondary steam's reuse. Because this part of secondary steam probably smugglies the potassium chloride crystal secretly in the in-process that rises, long-time operation back can take place the deposit on defoaming otter board 41, for avoiding defoaming otter board 41 to block up, sets up anti-blocking shower 42 above it and can in time wash and dredge defoaming otter board 41, is favorable to the operating cycle of extension fixture.

Specifically, the lower part of the evaporation crystallization chamber 4 is of an inverted cone structure, and the taper is 45-60 degrees. Set up the lower part of evaporation crystallization room 4 into the back taper structure, compare with circular structure, the back taper structure can utilize the action of gravity better to carry out the thickness layering with the potassium chloride crystal, and large granule potassium chloride crystal deposit is in the bottom, conveniently exports toward album salt jar 6, and the crystal of tiny granule floats on the upper strata, conveniently carries out the recirculation through the pipeline from the circulation material export for the crystal physical stamina of tiny granule grows up at the recirculation in-process, can obtain the great potassium chloride crystal product of crystal granule like this.

As shown in fig. 4, in detail, an automatic scale cleaning structure is arranged in the heating chamber 3, and the automatic scale cleaning structure includes a spring support 33, a spring 34, a limiting clamping plate 35 and a cleaning spiral steel wire 36; one end of a spring 34 is fixedly connected with the spring support 33, the other end of the spring 34 is fixedly connected with one end of a limiting clamping plate 35, and the other end of the limiting clamping plate 35 is connected with one end of a cleaning spiral steel wire 36; the spring support 33 is fixedly connected with the lower part of the heating chamber 3, and the spring support 33 is arranged above a feed port of the heating chamber 3; the spring 34 and the limiting clamping plate 35 are arranged outside the heating pipe of the heating chamber 3, and the cleaning spiral steel wire 36 extends into the heating pipe; the spring 34, the limiting clamping plate 35 and the cleaning spiral steel wire 36 are arranged in one-to-one correspondence with the heating pipes.

The spring 34 in the automatic scale cleaning structure can provide the power of the reciprocating motion of the whole mechanism, so that the cleaning spiral steel wire 36 does reciprocating motion in the heating pipe, the limiting clamping plate 35 controls the ascending limit position of the cleaning spiral steel wire 36, the cleaning spiral steel wire 36 moves upwards in the heating pipe under the influence of the flowing of the feed liquid, the spring 34 extends naturally, after the feed liquid is discharged from the heating pipe, part of the feed liquid is vaporized and decompressed, and the cleaning spiral steel wire 36 can reset downwards under the action of the pulling force of the spring 34 and does reciprocating motion in a recycling mode.

The cleaning spiral steel wire 36 moves up and down in a reciprocating mode, salt scale deposited on the inner wall of the heating tube can be scraped off in the moving process, the heating tube is prevented from being blocked due to salt scale deposition, the descaling and cleaning capacity is high, the operation period of the heating chamber 3 and the whole device is prolonged, the fluctuation range of feed liquid in the heating tube can be increased in the up and down reciprocating motion process, meanwhile, floating foam formed by boiling evaporation can be scattered, the heat exchange efficiency is effectively increased through the blocking deceleration and stirring of the cleaning spiral steel wire 36, and the heating effect is enhanced.

Specifically, the width of the end part of the limiting clamping plate 35 connected with the spring 34 is 1.1-1.5 times of the outer diameter of the heating pipe, and the length of the limiting clamping plate 35 is 50-100mm.

The effect of spacing cardboard 35 is that the motion to wasing spiral steel wire 36 carries out limit positioning for prevent to wash spiral steel wire 36 along with the air current limitlessly rise, and then cause spring 34 to damage unable the recovering because of excessive tensile deformation, the setting of spacing cardboard 35 has avoided automatic scale cleaning structure to lose the power that provides reciprocating motion because of spring 34 warp, and then has avoided the loss of the self-cleaning function of scale cleaning structure.

Specifically, the length of the cleaning spiral steel wire 36 is 200-500mm shorter than the length of the heating pipe, and the outer diameter of the cleaning spiral steel wire 36 is 0.7-0.9 times of the inner diameter of the heating pipe.

KCl evaporation salting apparatus for producing, during specific work, the feed liquid that contains the potassium chloride utilizes charge pump 1 to send into feeding preheater 2 and preheats, and the feed liquid after preheating gets into heating chamber 3, becomes steam-water mixture after heating vaporization through exogenous steam. The cleaning spiral steel wire 36 can be reset downwards under the action of the pulling force of the spring 34 and can perform reciprocating motion again, the cleaning spiral steel wire 36 can scrape salt scale deposited on the inner wall of the heating pipe during the reciprocating motion, the heating pipe is prevented from being blocked due to the salt scale deposition, the fluctuation range of the material liquid in the heating pipe can be increased, meanwhile, froth formed by boiling evaporation can be scattered, the heat exchange efficiency is effectively increased, and the heating effect is enhanced.

When the material liquid exchanges heat and evaporates in the heating chamber 3, the vibration descaling mechanism is started, the vibrating rod 31 is driven by the vibrating motor 32 to vibrate continuously or intermittently, if the feeding amount fluctuates or the temperature of the heating chamber 3 is controlled too high, the material liquid in the heating chamber 3 is supersaturated, and crystals on the inner wall of the heating tube are removed by vibration in time when the material liquid is crystallized in the heating tube, so that the scale formation and blockage on the inner wall of the heating tube are effectively prevented, and the heat exchange efficiency of the heating chamber 3 is improved.

The steam-water mixture tangentially enters the evaporative crystallization chamber 4 through a pipeline, and evaporation and crystallization separation are carried out in the evaporative crystallization chamber 4. The secondary steam generated by evaporation enters the feed preheater 2 to be used as a heating medium, and is finally discharged to a recovery tank through a cold water pipeline through a heating medium outlet of the feed preheater 2. The residual feed liquid after evaporation falls to the lower part of the evaporation crystallization chamber 4 for crystallization, the potassium chloride crystals are subjected to thickness stratification under the gravity action of an inverted cone structure, and large-particle potassium chloride crystals are deposited at the bottom and conveyed to the salt collecting tank 6 through a crystal outlet; the crystals of the tiny particles are mixed with the unevaporated water to float on the upper layer, and then enter the heating chamber 3 again through the circulating pump 5 from the circulating material outlet for evaporation and crystallization, so that the crystals of the tiny particles can grow up in the recycling process, and the potassium chloride crystal product with larger crystal particles is obtained.

In another embodiment, the steam-water mixture enters the evaporation crystallization chamber 4 tangentially through a pipeline, and evaporation and crystallization separation are carried out in the evaporation crystallization chamber 4. After the secondary steam that the evaporation produced upwards removes the foam through removing foam otter board 41, get into as heating medium and use in the feeding preheater 2 from the steam outlet of evaporation crystallization room 4, finally discharge to the recovery pond through cold water pipeline through the heating medium export of feeding preheater 2. The anti-blocking spray pipe 42 above the defoaming screen plate 41 sprays steam condensate or clean water to the defoaming screen plate 41 at regular time, so that the defoaming screen plate 41 is cleaned and dredged in time, and the blockage of the defoaming screen plate 41 is avoided. The residual feed liquid after evaporation falls to the lower part of the evaporation crystallization chamber 4 for crystallization, potassium chloride crystals are subjected to thickness stratification under the action of gravity of an inverted cone structure, large-particle potassium chloride crystals are deposited at the bottom and are firstly conveyed to a filter press 7 from a crystal outlet of the evaporation crystallization chamber 4, after solid-liquid separation is carried out in the filter press 7, potassium chloride crystal products with high purity and low water content are conveyed to a salt collecting tank 6 from a crystallization outlet pipe of the filter press 7, and mother liquor separated by the filter press 7 is conveyed into a feeding preheater 2 for circulation evaporation, so that the residual potassium chloride in the mother liquor can be crystallized and recovered again, and the potassium chloride can be recovered to the maximum extent.

It should be noted that, in the present invention, the detailed structure of some devices is not described in detail, but belongs to the prior art known to those skilled in the art, and therefore, the detailed description is omitted here.

It should be noted that, pressure sensors, flow meters or temperature sensors are disposed between different units or devices and apparatuses on the conveying pipeline inside the system, and different valves, such as pressure relief valves, pressure regulating valves, safety valves, etc., for regulating and stabilizing the pressure of the whole system are also disposed.

It should be noted that, under the guidance of the present invention, those skilled in the art can also make partial modifications to the above system. For example, a liquid level meter, an overflow/nitrogen pipeline and the like are arranged on equipment in the system; the conveying pipeline in the system is provided with a pump, a pressure sensor, a flowmeter or a temperature sensor and the like among different units or devices and equipment, and is also provided with different valves, such as a pressure relief valve, a pressure regulating valve, a safety valve, a pneumatic valve and the like which are used for regulating and stabilizing the pressure of the whole system, and the opening of the valves can be regulated to regulate the material flow in the pipeline.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (8)

1. A KCl evaporation salting production device is characterized by comprising: the system comprises a feed pump, a feed preheater, a heating chamber, an evaporation crystallization chamber, a circulating pump and a salt collecting tank;

the feeding pump, the feeding preheater and the feeding port at the lower part of the heating chamber are sequentially connected through a feeding pipeline, and a material outlet at the top of the heating chamber is connected with the feeding port of the evaporative crystallization chamber;

a steam outlet at the top of the evaporative crystallization chamber is connected with a heating medium inlet of the feed preheater, a crystal outlet at the bottom of the evaporative crystallization chamber is connected with the salt collecting tank, and a circulating material outlet at the lower part of the evaporative crystallization chamber is connected with an inlet of the circulating pump; the outlet of the circulating pump is connected with the feed inlet of the heating chamber; a heating medium outlet of the feeding preheater is discharged to a recovery tank through a cold water pipeline;

a vibration descaling mechanism is arranged in a gap between the outer walls of the heating pipes of the heating chamber, and comprises a plurality of vibrating rods penetrating through the heating chamber and vibrating motors arranged at two ends of the vibrating rods; the vibration motor is disposed outside the heating chamber.

2. The KCl evaporative salt-separating production device of claim 1, wherein the feed inlet of the evaporative crystallization chamber is arranged in the tangential direction of the barrel of the evaporative crystallization chamber, and the material outlet at the top of the heating chamber is tangentially connected with the evaporative crystallization chamber through a pipeline.

3. The KCl evaporative salt-separating production device according to claim 1, wherein a filter press is further arranged between the evaporative crystallization chamber and the salt collecting tank; the feed inlet of the filter press is connected with a crystal outlet at the bottom of the evaporation crystallization chamber, a mother liquid outlet of the filter press is connected with a material inlet of the feed preheater, and a crystallization outlet pipe of the filter press is connected with the salt collecting tank.

4. The KCl evaporative salt-separating production device according to claim 1, wherein a defoaming screen plate is further arranged below the steam outlet of the evaporative crystallization chamber, and an anti-blocking spray pipe is further arranged above the defoaming screen plate.

5. The KCl evaporative salt deposition production device according to claim 1, wherein the lower part of the evaporative crystallization chamber has an inverted conical structure, and the conicity is 45-60 °.

6. The KCl evaporative salting production device according to any one of claims 1 to 5, wherein an automatic scale cleaning structure is arranged in the heating chamber, and the automatic scale cleaning structure comprises a spring bracket, a spring, a limiting clamping plate and a cleaning spiral steel wire;

one end of the spring is fixedly connected with the spring support, the other end of the spring is fixedly connected with one end of the limiting clamping plate, and the other end of the limiting clamping plate is connected with one end of the cleaning spiral steel wire;

the spring support is fixedly connected with the lower part of the heating chamber and is arranged above the feeding hole of the heating chamber;

the spring and the limiting clamping plate are arranged outside the heating pipe of the heating chamber, and the cleaning spiral steel wire extends into the heating pipe; the spring, the limiting clamping plate and the cleaning spiral steel wire are arranged in one-to-one correspondence with the heating pipes.

7. The KCl evaporative salt deposition apparatus according to claim 6, wherein the width of the end of the limiting catch plate connected to the spring is 1.1-1.5 times the outer diameter of the heating tube, and the length of the limiting catch plate is 50-100mm.

8. The KCl evaporative salting production apparatus according to claim 6, wherein the cleaning spiral wire has a length 200-500mm shorter than the heating tube, and an outer diameter 0.7-0.9 times an inner diameter of the heating tube.

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