CN218107679U - KCl evaporating salt production device - Google Patents

Abstract

The utility model provides a KCl evaporation and salt production device, comprising a feed pump, a feed preheater, a heating chamber, an evaporation crystallization chamber, a circulation pump and a salt collection tank; a feed pump, a feed preheater and a heating chamber Connect in sequence, the material outlet of the heating chamber is connected to the feed port of the evaporation crystallization chamber; the steam outlet of the evaporation crystallization chamber is connected to the heating medium inlet of the feed preheater, the crystal outlet of the evaporation crystallization chamber is connected to the salt collection tank, and the evaporation crystallization The outlet of the circulating material in the chamber is connected to the inlet of the circulating pump; the outlet of the circulating pump is connected to the feeding port of the heating chamber; a vibration descaling mechanism is arranged in the gap between the outer wall of the heating tube of the heating chamber, and the vibration descaling mechanism includes multiple vibrating rods and vibrating motors arranged at both ends of a plurality of vibrating rods. The device of the utility model solves the problems of scaling on the inner wall of the heating tube due to evaporation and crystallization of the solution in the existing evaporation crystallization device, as well as reduced heat exchange efficiency of the device, reduced processing capacity, blockage of the heating tube and high frequency of dredging and cleaning during shutdown.

Description

KCl evaporating salt production device

technical field

The utility model relates to the technical field of potassium chloride production, in particular to a KCl evaporation salt production device.

Background technique

Due to rich mineral resources, simple production methods, high potassium content and low cost, potassium chloride is still the most important potash fertilizer in the world, accounting for more than 90% of the global potash fertilizer sales, of which 50% can be directly The rest is mainly used to make compound fertilizers. Potassium chloride is an important fertilizer needed for plant growth. It has fast fertilizer efficiency and can be absorbed by the soil, so it is not easy to lose. Applying appropriate amount of potassium fertilizer can make the crop stems grow firm, prevent lodging, promote flowering and fruiting, and enhance drought resistance, cold resistance, The ability to resist diseases and insect pests is of great significance to high agricultural yield. In potassium chloride fertilizer, the content of potassium chloride is generally more than 90-95%, of which K ₂ O content is about 60-63%, and chlorine (Cl) is about 47.6%. In addition, it also contains a small amount of sodium, calcium, magnesium, Bromine and sulfate, etc., it is hygroscopic, easy to agglomerate, and soluble in water. Pure potassium chloride is white or light yellow cubic crystal.

Simultaneously, potassium chloride is also a kind of important inorganic compound salt in the industry, and the industrial demand is increasing day by day, so there has been a larger crystallization gap of potassium chloride salt, which needs to be alleviated by large-scale and continuous production methods. Considering the amount of processing and evaporation of potassium chloride, and the fact that the solubility of potassium chloride does not change much with temperature, potassium chloride is separated by cooling and crystallization, but crystal precipitation is not obvious, product purity is low, and production efficiency is low. The problem of low cost and inability to carry out continuous production, while evaporative crystallization is to precipitate salt by evaporating the solvent, and the residual solute after the solvent is evaporated is potassium chloride crystal, so the evaporative crystallization process for potassium chloride is more suitable.

The evaporation crystallization process is to make the solution reach saturation through the loss of the solvent (ie evaporation), and then reach the supersaturated state. At a certain temperature, the quality of a certain solute that can be dissolved by a certain amount of water (or solvent) is limited. , then the excess solute will precipitate out with the reduction of the solvent, that is, crystallization. However, in existing evaporative crystallization devices, no matter whether it is natural circulation or forced circulation, there is a situation that the inner wall of the heating tube of the heating chamber of the device is fouled due to the evaporation and crystallization of the solution. The heat exchange efficiency and evaporation effect of the tube, the scaling for a long time will block the heating tube, and the salt scale on the inner wall of the heating tube is not easy to clean, the frequency of dredging and cleaning is high, and dredging and cleaning will lead to the shutdown of the device and the production Handle volume reduction issues.

Utility model content

The utility model provides a KCl evaporative salt production device, which is used to solve the problem that in the existing evaporative crystallization device, the scaling on the inner wall of the heating tube is caused by the evaporation and crystallization of the solution, which further leads to the reduction of the heat exchange efficiency of the device, the reduction of the processing capacity, and the blockage. The problem of high frequency of cleaning of heating pipes and outage dredging.

The utility model provides a KCl evaporation and salt production device, comprising: a feed pump, a feed preheater, a heating chamber, an evaporation crystallization chamber, a circulation pump and a salt collection tank; a feed pump, a feed preheater and a heating The feed inlet at the lower part of the chamber is connected sequentially through feed pipes, and the material outlet at the top of the heating chamber is connected with the feed inlet of the evaporation crystallization chamber.

Specifically, the steam outlet at the top of the evaporation crystallization chamber is connected to the heating medium inlet of the feed preheater, the crystal outlet at the bottom of the evaporation crystallization chamber is connected to the salt collection tank, and the circulation material outlet at the bottom of the evaporation crystallization chamber is connected to the circulation pump. The inlet is connected; the outlet of the circulation pump is connected with the feed inlet of the heating chamber; the outlet of the heating medium of the feed preheater is discharged to the recovery pool through the cold water pipe.

Specifically, a vibration descaling mechanism is provided in the outer wall gap of the heating tube of the heating chamber, and the vibration descaling mechanism includes a plurality of vibration rods penetrating the heating chamber, and vibration motors arranged at both ends of the plurality of vibration rods; the vibration motor is set outside the heating chamber.

Specifically, the feed port of the evaporative crystallization chamber is arranged in the tangential direction of the cylinder of the evaporative crystallization chamber, and the material outlet at the top of the heating chamber forms a tangential connection with the evaporative crystallization chamber through a pipe.

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

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

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

Specifically, the heating chamber is equipped with an automatic scale cleaning structure, which includes a spring bracket, a spring, a limit clamp and a cleaning spiral steel wire; one end of the spring is fixedly connected to the spring support, and the other end of the spring is connected to the limit clamp. One end is fixedly connected, and the other end of the limit clamp is connected to one end of the cleaning spiral steel wire; the spring support is fixedly connected to the lower part of the heating chamber, and the spring support is arranged above the feeding port of the heating chamber; the spring and the limit clamp are set Outside the heating tube of the heating chamber, the cleaning spiral steel wire extends into the inside of the heating tube; the spring, the limit clamp and the cleaning spiral steel wire are arranged in correspondence with the heating tube.

Specifically, the width of the end of the limit clip connected to the spring is 1.1-1.5 times the outer diameter of the heating tube, and the length of the limit clip is 50-100 mm.

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

The KCl evaporative salt production device provided by the utility model can realize the continuous production of potassium chloride, and the circulation heating and evaporation can improve the evaporation crystallization efficiency, so that the processing capacity is greatly increased, the device has high operating stability, and solves the problem of low purity of potassium chloride, The problems of low output, high production cost and low production efficiency can improve economic benefits.

The KCl evaporative salt production device provided by the utility model uses a vibration descaling mechanism and an automatic descaling structure during production and operation, which can avoid scaling and frequent blockage on the inner wall of the heating tube, reduce the frequency of device shutdown and dredging and cleaning, and improve the efficiency of replacement. The thermal efficiency makes the supersaturation of the feed liquid uniform, the crystal particle size distribution is good, the energy consumption of the device is low, the failure occurs less, and the amount of external steam is small, realizing high-efficiency continuous crystallization.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the appended drawings in the following description The drawings show some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is the structural representation of the KCl evaporative salt production device that an embodiment of the present invention provides;

Fig. 2 is a structural schematic diagram of a vibration descaling mechanism provided by an embodiment of the present invention;

Fig. 3 is the structural representation of the KCl evaporative salt production device that another embodiment of the present invention provides;

Fig. 4 is a structural schematic diagram of an automatic cleaning structure provided by an embodiment of the present invention.

Explanation of reference signs:

1. Feed pump, 2. Feed preheater, 3. Heating chamber, 4. Evaporation and crystallization chamber, 5. Circulation pump, 6. Salt collection tank, 7. Filter press, 31. Vibration rod, 32. Vibration Motor, 33, spring support, 34, spring, 35, limit clamp, 36, cleaning spiral steel wire, 41, defoaming mesh plate, 42, anti-blocking spray pipe.

detailed description

In order to make the purpose, 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. Obviously, the described embodiments are part of the embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts also belong to the scope of protection of the present invention.

As shown in Figure 1, the utility model provides a KCl evaporative salt production device, including: feed pump 1, feed preheater 2, heating chamber 3, evaporation crystallization chamber 4, circulation pump 5 and salt collection tank 6 ; Feed pump 1, feed preheater 2 and the lower feed port of heating chamber 3 are connected sequentially through feed pipelines, and the material outlet at the top of heating chamber 3 is connected with the feed port of evaporation crystallization chamber 4.

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

The feed liquid containing KCl is evaporated by setting the heating chamber 3 using external steam, so that the feed liquid is crystallized and separated in the evaporation crystallization chamber 4; The feed material in 2 is preheated, which can not only recycle waste heat, save energy, avoid heat loss, but also preheat the feed material in advance, which can reduce the heat source demand and external steam consumption of heating chamber 3, and reduce production cost.

Circular heating is set between the evaporation crystallization chamber 4 and the heating chamber 3, which can repeatedly evaporate the feed liquid containing tiny crystals in the evaporation crystallization chamber 4, so that the tiny crystals can grow into larger crystals during the circulation process, which is convenient Recycling can also use the circulating feed liquid to regulate the safe, stable and efficient operation of the entire KCl evaporation and salt production device.

As shown in Figure 2, specifically, a vibration descaling mechanism is provided in the outer wall gap of the heating tube of the heating chamber 3, and the vibration descaling mechanism includes a plurality of vibrating rods 31 passing through the heating chamber 3, and is arranged on a plurality of vibrating rods Vibration motor 32 at two ends of 31; Vibration motor 32 is arranged on the outside of heating chamber 3.

It should be noted that the number of the above-mentioned vibrating rods 31 is set according to the number of heating tubes, the utility model is not limited, one or more vibrating rods 31 can be arranged in parallel in the gap of each row of heating tubes, or several One or more vibrating rods 31 are arranged in parallel in the gap of the heating tube bundle composed of rows of heating tubes.

A vibration descaling mechanism is set in the gap between the heating tubes of the heating chamber 3, wherein the vibration motor 32 can control the vibrating rod 31 to vibrate continuously or intermittently. When the medium feed liquid is supersaturated and crystallizes in the heating tube, the crystals on the inner wall of the heating tube can be vibrated and removed in time, the cleanliness of the heating tube can be improved, the scaling and blockage of the inner wall of the heating tube can be effectively prevented, and the efficiency of the heating chamber 3 can be improved. High heat exchange efficiency, prolonging the service time of the heating tube, reducing the frequency of device shutdown and dredging and cleaning the heating tube, and reducing production costs.

Specifically, the feed port of the evaporation crystallization chamber 4 is arranged in the tangential direction of the barrel of the evaporation crystallization chamber 4, and the material outlet at the top of the heating chamber 3 forms a tangential connection with the evaporation crystallization chamber 4 through a pipeline.

The feed ports of the existing evaporative crystallization chamber 4 all extend vertically into the inside of the evaporative crystallization chamber 4, and during the process of the potassium chloride crystals falling, it is easy to deposit on the built-in feed pipe and the feed port to form Salt scale, after large pieces of salt scale fall off, it is easy to cause blockage of the output pipeline, which is not conducive to the stable production of the device. In the utility model, the evaporation and crystallization chamber 4 adopts a tangential feeding method, so that the saturated potassium chloride feed liquid discharged from the heating chamber 3 rotates and feeds along the cylinder body. It is continuously washed by the feed, so it is not easy to form salt scale in the evaporation crystallization chamber 4. After a large amount of water evaporates, it is convenient for the supersaturated solution to crystallize in the lower part of the evaporation crystallization chamber 4, prolonging the production cycle of the device.

As shown in Figure 3, specifically, a filter press 7 is also arranged between the evaporation crystallization chamber 4 and the salt collection tank 6; The mother liquor outlet of the machine 7 is connected with the material inlet of the feed preheater 2, and the crystallization outlet pipe of the filter press 7 is connected with the salt collecting tank 6.

The heated feed liquid is evaporated, crystallized and separated in the evaporation crystallization chamber 4, and the bottom of the evaporation crystallization chamber 4 can grow and deposit large and uniform potassium chloride crystals, and send this part of potassium chloride crystals into the filter press Carry out solid-liquid separation in 7, can obtain the potassium chloride crystalline product with higher purity, low water content, send the mother liquor that separates through filter press 7 into feed preheater 2 and circulate and evaporate, can make residual in the mother liquor Potassium chloride is recrystallized again, can reclaim potassium chloride to the greatest extent.

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

In this utility model, the secondary steam generated by the evaporation and crystallization chamber 4 is used for feed preheating, which is an example of secondary steam recovery and utilization, and this part of secondary steam can also be used for equipment or materials in other sections Heating, when other equipment has high requirements on the defoaming of the secondary steam, setting the defoaming screen 41 in the evaporation crystallization chamber 4 can further defoam and clean the secondary steam, which is beneficial to the reuse of the secondary steam . Since this part of the secondary steam may entrain potassium chloride crystals during the rising process, after a long time of operation, deposition will occur on the defoaming net plate 41. In order to avoid the clogging of the defoaming net plate 41, an anti-blocking spray is set above it The pipe 42 can clean and dredge the defoaming screen 41 in time, which is beneficial to prolong the operating period of the device.

Specifically, the lower part of the evaporation and crystallization chamber 4 is an inverted cone structure with a taper of 45°-60°. The lower part of the evaporation crystallization chamber 4 is set as an inverted conical structure. Compared with the circular structure, the inverted conical structure can better use gravity to carry out coarse and subdivided potassium chloride crystals, and large grains of potassium chloride crystals are deposited on the The bottom is convenient to be transported to the salt collection tank 6, and the crystals of tiny particles float on the upper layer, which is convenient for recirculation from the outlet of the circulating material through the pipeline, so that the crystals of tiny particles can grow up during the recirculation process, so that larger crystal particles can be obtained Potassium chloride crystal product.

As shown in Figure 4, specifically, the heating chamber 3 is provided with an automatic descaling structure, and the automatic descaling structure includes a spring support 33, a spring 34, a limit clamp 35 and a cleaning spiral steel wire 36; one end of the spring 34 is connected to the spring support 33 is fixedly connected, the other end of the spring 34 is fixedly connected with an end of the limit clamp 35, and the other end of the limit clamp 35 is connected with one end of the cleaning spiral steel wire 36; the spring support 33 is fixedly connected with the bottom of the heating chamber 3, and Spring support 33 is arranged on the top of the feeding port of heating chamber 3; Spring 34 and limit clip 35 are arranged on the outside of the heating pipe of heating chamber 3, and cleaning spiral steel wire 36 stretches into the inside of heating pipe; The clamping plate 35 and the cleaning spiral steel wire 36 are provided in one-to-one correspondence with the heating tubes.

The spring 34 in the automatic cleaning structure can provide the power for the reciprocating movement of the whole mechanism, so that the cleaning spiral steel wire 36 reciprocates in the heating tube, and the limit clamp 35 controls the rising limit position of the cleaning spiral steel wire 36, and the cleaning spiral steel wire 36 moves upwards in the heating tube affected by the flow of the material liquid, and the spring 34 naturally elongates. When the material liquid is discharged from the heating tube, part of the material liquid vaporizes and releases pressure, and the cleaning spiral steel wire 36 will reset downward under the tension of the spring 34 , recirculating reciprocating motion.

The up and down reciprocating movement of the cleaning spiral steel wire 36 can scrape off the salt scale deposited on the inner wall of the heating tube during the movement, avoiding the blockage of the heating tube due to the deposition of salt scale, strong descaling and cleaning ability, and extending the length of the heating chamber 3 and the whole set of equipment In the process of reciprocating up and down, it can also increase the fluctuation range of the material liquid in the heating tube, and at the same time, it can also break up the foam formed by boiling and evaporation. By cleaning the spiral steel wire 36 to block deceleration and agitation, it can effectively increase the temperature. The heat exchange efficiency is increased, and the heating effect is strengthened.

Specifically, the width of the end of the limiting clip 35 connected to the spring 34 is 1.1-1.5 times the outer diameter of the heating tube, and the length of the limiting clip 35 is 50-100 mm.

The function of the limit clamp 35 is to limit the movement of the cleaning spiral steel wire 36, so as to prevent the cleaning spiral steel wire 36 from rising indefinitely with the air flow, thereby causing the spring 34 to be deformed and damaged due to excessive stretching and cannot be recovered. The setting of 35 prevents the automatic descaling structure from losing the power to provide reciprocating motion due to the deformation of the spring 34, thereby avoiding the loss of the automatic cleaning function of the descaling structure.

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

KCl evaporative salt production device, during specific work, the feed liquid containing potassium chloride is sent to the feed preheater 2 by the feed pump 1 for preheating, the preheated feed liquid enters the heating chamber 3, and is passed through an external source The steam turns into a soda-water mixture after being heated and vaporized. Wherein, when the feed liquid moves upward in the heating tube, it drives the cleaning spiral steel wire 36 in the heating tube to also move upward, and the limit clamp 35 connected therewith also moves accordingly, so that the spring 34 naturally elongates, and when the feed liquid After being discharged from the heating tube, part of the feed liquid is vaporized and released to release pressure, and the cleaning spiral steel wire 36 will reset downward under the tension of the spring 34, and recirculate and reciprocate. The deposited salt scale is rubbed off to avoid the blockage of the heating tube due to the deposition of salt scale, and it can also increase the fluctuation range of the material liquid in the heating tube, and at the same time, it can also break up the foam formed by boiling and evaporation, effectively increasing the heat transfer efficiency and strengthening heating effect.

When the feed liquid is heat-exchanged and evaporated in the heating chamber 3, the vibration descaling mechanism is started, and the vibration rod 31 is driven by the vibration motor 32 to vibrate continuously or intermittently. When the feed liquid in chamber 3 is supersaturated and crystallizes in the heating tube, the crystals on the inner wall of the heating tube can be vibrated and removed in time, effectively preventing the inner wall of the heating tube from fouling and clogging, and improving the heat exchange efficiency of the heating chamber 3.

The above steam-water mixture enters the evaporative crystallization chamber 4 tangentially through the pipeline, and evaporates and crystallizes and separates in the evaporative crystallization chamber 4 . The secondary steam generated by evaporation enters the feed preheater 2 and is used as a heating medium, and finally passes through the outlet of the heating medium of the feed preheater 2 and is discharged to the recovery pool through the cold water pipeline. The remaining material liquid after evaporation falls to the lower part of the evaporation and crystallization chamber 4 for crystallization, and the potassium chloride crystals are coarsely subdivided by the gravity of the inverted cone structure, and the large grains of potassium chloride crystals are deposited at the bottom, and are transported through the crystal outlet to Salt collection tank 6; the crystals of tiny particles are mixed with unevaporated water and float on the upper layer, and enter the heating chamber 3 again from the outlet of the circulating material through the circulation pump 5 for evaporation and crystallization, so that the crystals of tiny particles can grow up in the recirculation process and obtain Potassium chloride crystal product with larger crystal grains.

In another embodiment, the above steam-water mixture enters the evaporative crystallization chamber 4 tangentially through the pipeline, and evaporates and crystallizes and separates in the evaporative crystallization chamber 4 . The secondary steam generated by evaporation passes upward through the defoaming screen 41 for defoaming, then enters the feed preheater 2 from the steam outlet of the evaporation crystallization chamber 4 to be used as a heating medium, and finally passes through the heating medium of the feed preheater 2 The outlet drains to a recovery tank through a cold water pipe. The anti-blocking spray pipe 42 above the defoaming screen 41 regularly sprays steam condensate or clean water on the defoaming screen 41, and cleans and dredges the defoaming screen 41 in time to prevent the defoaming screen 41 from clogging. The remaining material liquid after evaporation falls to the lower part of the evaporation crystallization chamber 4 for crystallization, and the potassium chloride crystals are coarsely subdivided by the gravity of the inverted cone structure, and the large particle potassium chloride crystals are deposited on the bottom, and the crystallization is carried out from the evaporation crystallization chamber 4 The crystal outlet of the crystal is first transported to the filter press 7, and after the solid-liquid separation is carried out in the filter press 7, the potassium chloride crystallization product with higher purity and low water content is transported to the salt collection tank from the crystallization outlet pipe of the filter press 7 6. The mother liquor separated by the filter press 7 is sent to the feed preheater 2 to circulate and evaporate, 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 this utility model, the detailed structure of some devices is not described in detail, but it belongs to the prior art known to those skilled in the art, so it will not be repeated here.

It should be noted that the conveying pipeline inside the system is provided with pressure sensors, flow meters or temperature sensors between different units or devices and equipment, and is also provided with different valves, such as pressure relief valves, pressure regulating valves, safety valves, etc. Valves used to regulate and stabilize the pressure of the entire system.

It should be noted that those skilled in the art can make some modifications to the above system under the guidance of the utility model. For example, liquid level gauges, overflow/nitrogen pipelines, etc. are installed on the equipment in the system; pumps, pressure sensors, flow meters, or temperature sensors, etc. are installed between different units or devices and equipment on the delivery pipelines inside the system. There are also different valves, such as pressure relief valves, pressure regulating valves, safety valves, pneumatic valves, etc., which are used to adjust and stabilize the pressure of the entire system. The opening of the valve can also be adjusted to adjust the flow of materials in the pipeline.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model, rather than limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

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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