Purification device for potassium chloride raw material

Abstract

The utility model discloses a purification device for a potassium chloride raw material, which relates to the technical field of chemical engineering and comprises a support frame, a potassium chloride purification tank is arranged at the top end of the support frame, a discharge pipe is arranged at the bottom end of the potassium chloride purification tank, and a screening mechanism is arranged at one end of the discharge pipe; an exhaust cylinder is arranged in the middle of the top end of the potassium chloride purification tank, a feeding pipe is arranged at the top of the outer side of the potassium chloride purification tank, and a feeding mixing mechanism is arranged at one end of the feeding pipe; and a fan is arranged on one side of the screening mechanism. The purification device for the potassium chloride raw material is reasonable and reliable in structure, optimizes the purification process of potassium chloride by controlling the temperature of potassium chloride airflow and introducing the crystallization supercooling degree, and can improve the crystallization efficiency and the product quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chemical industry technical field, specifically, relate to a kind of purification device for potassium chloride raw material. BACKGROUND

[0002] At present, in the process of simultaneously operating in the municipal solid waste, hazardous waste system, the following problems may exist, which leads to low system disposal efficiency, mainly manifested as:

[0003] (1) the disposal of hazardous waste source is unstable. The quality control of clinker found that the chloride ion content is immediately stopped hazardous waste disposal, which reduces the hazardous waste treatment capacity;

[0004] (2) when disposing municipal solid waste, not only has great influence on the quality of clinker, but also leads to continuous high HCl emission of kiln tail chimney, which increases the environmental protection risk in the production process;

[0005] (3) due to the enrichment of a large amount of harmful elements such as chlorine, sulfur and alkali in the kiln system, the skin of the fourth and fifth stage cyclone of the preheater and the decomposition furnace is serious, which affects the ventilation of the system, leading to the reduction of kiln output, and the reduction of production reaches 15% in severe cases, which greatly increases the coal consumption and power consumption of clinker;

[0006] (4) high chloride ion content in the system increases the corrosion rate of downstream equipment, which affects the service life of the rotary kiln cylinder, refractory bricks and preheater lining, etc.

[0007] Therefore, in order to assist in the disposal of municipal solid waste, to create a good ecological environment together, to release a large amount of mine reserves, to successfully implement the municipal solid waste resource treatment project, to ensure the stable operation of the collaborative disposal of municipal solid waste system, and to reduce the cyclic enrichment of harmful elements such as chloride ions in the system, it is currently a key problem to be solved.

[0008] Among them, the traditional bypass air release process releases 5% of air, and the hot gas of about 1100℃ is extracted and cooled to 200℃ or even lower in the vertical quenching chamber, and the dust with low chlorine content is collected by the cyclone dust collector and returned to the preheater system. The high-chlorine dust is cooled again by the multi-tube cooler, and the exhaust gas is discharged into the high-temperature fan outlet pipeline by the exhaust fan after purification by the bag dust collector. The high-chlorine dust collected by the bag dust collector is transported to the clinker store or the cement grinding mill for use as a mixing material. The equipment installed power is about 300KW, the chloride ion content in the high-chlorine ash is about 15%, and it is difficult to dispose.

[0009] In view of the problems in the related art, no effective solution has been proposed so far. CONTENT OF THE UTILITY MODEL

[0010] In view of the problems in the related art, the utility model proposes a kind of purification device for potassium chloride raw material to overcome the above technical problems existing in the prior art.

[0011] To this end, the specific technical solutions of the utility model are as follows:

[0012] A kind of for potassium chloride raw material's purification device, including support frame, the top of support frame is provided with potassium chloride purification tank, the bottom of potassium chloride purification tank is provided with discharge pipe, one end of discharge pipe is provided with screening mechanism;The top middle part of potassium chloride purification tank is provided with exhaust cylinder, the outside top of potassium chloride purification tank is provided with feed pipe, one end of feed pipe is provided with material mixing mechanism;The side of screening mechanism is provided with fan.

[0013] Further, in order to realize the screening of potassium chloride particles, through the cooperation of the screening shell and the screening cylinder, efficient particle size separation can be realized, and larger potassium chloride crystal particles can be effectively screened out. The auger can smoothly discharge the screened material, reducing accumulation and blockage. The screening mechanism includes a screening shell provided at one end of the discharge pipe. The inside of the screening shell is provided with a screening cylinder. One end of the screening shell is provided with an extension cylinder. The outside bottom of the extension cylinder is provided with a discharge pipe. One end of the extension cylinder is provided with a drive motor. The output shaft of the drive motor penetrates the inner wall of the screening cylinder and is provided with an auger. The bottom end of the screening shell is conical in structure. The bottom end of the screening shell is connected to the fan through a connecting pipe.

[0014] Further, in order to effectively discharge the excess gas flow in the potassium chloride purification tank, the spiral guide vane can effectively control the flow direction of the gas flow, making the gas flow inside the purification tank more uniform, allowing the potassium chloride to crystallize quickly and form potassium chloride particles, thereby improving the purification efficiency of potassium chloride. The bottom end of the exhaust cylinder is located inside the potassium chloride purification tank, and the bottom outside of the exhaust cylinder is provided with a plurality of spiral guide vanes.

[0015] Further, in order to realize the supercooling degree of potassium chloride gas flow, the high-temperature potassium chloride gas flow inside the mixing pipe can be driven to mix with cold air under the drive of the mixing motor, achieving temperature reduction. This can make the potassium chloride vapor obtain crystallization supercooling degree, facilitating subsequent crystallization of potassium chloride. One end of the material mixing mechanism is provided with a mixing pipe. The outside of the mixing pipe is provided with gear one. The bottom end of the gear one is provided with a mixing motor. One end of the output shaft of the mixing motor is provided with gear two engaged with gear one. The bottom end of the mixing motor is provided with a support plate connected to the potassium chloride purification tank. One end of the mixing pipe is provided with a material inlet pipe. One end of the material inlet pipe is provided with a potassium chloride gas flow inlet pipe. The bottom end of the material inlet pipe is provided with an air outlet pipe connected to the fan. The outside of the air outlet pipe is provided with a gas supplement pipe. The inner wall of the mixing pipe is provided with a plurality of spoiler plates, and the cross section of the spoiler plate is spiral.

[0016] Further, in order to realize the rotation of the mixing pipe, the end of the mixing pipe is connected to the material inlet pipe and the feed pipe through a rotary joint.

[0017] The utility model discloses the beneficial effect is:

[0018] 1, the utility model discloses reasonable and reliable structure, the purification device of potassium chloride raw material passes through the temperature control and the crystallization supercooling degree of introduction to potassium chloride airflow, has optimized the purification process of potassium chloride, can promote the efficiency and product quality of crystallization.

[0019] 2, by setting up screening mechanism, to realize the screening of potassium chloride particle, can realize efficient granularity separation through the cooperation of screening shell and screening cylinder, and the large potassium chloride crystalline particle can be effectively screened out, and the auger can smoothly discharge the screened material, reduces the accumulation and blockage.

[0020] 3, by setting up exhaust cylinder, can effectively discharge the excess airflow of potassium chloride purification tank, can effectively control airflow direction through spiral guide vane, make the gas flow in the purification tank more uniform, can make potassium chloride can crystallize fast, form potassium chloride particle, and then realized the purification efficiency of potassium chloride.

[0021] 4, by setting up the feeding mixing mechanism, to realize the supercooling degree of potassium chloride airflow, whether under the drive of mixing motor can drive the high-temperature potassium chloride airflow in the mixing pipe and cold air mixed flow, realize the reduction of temperature, can make potassium chloride steam obtain crystallization supercooling degree, be convenient for the crystallization of subsequent potassium chloride. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is a structure schematic view of a kind of purification device for potassium chloride raw material according to the utility model embodiment;

[0024] Figure 2 It is a structure schematic view of potassium chloride purification tank in a kind of purification device for potassium chloride raw material according to the utility model embodiment;

[0025] Figure 3 It is another angle structure schematic view of a kind of purification device for potassium chloride raw material according to the utility model embodiment;

[0026] Figure 4 It is Figure 3 Local enlarged view in A of Fig.

[0027] Figure 5It is a screen mechanism sectional view of a purification device for potassium chloride raw materials according to the embodiment of the utility model.

[0028] Figure 6 It is a structure schematic view of a mixing pipe in a purification device for potassium chloride raw materials according to the embodiment of the utility model.

[0029] In the drawing,

[0030] 1, support frame, 2, potassium chloride purification tank, 3, discharge pipe, 4, screening mechanism, 401, screening shell, 402, screening cylinder, 403, extension cylinder, 404, discharge pipe, 405, drive motor, 406, auger, 407, connecting pipe, 5, exhaust cylinder, 501, spiral guide vane, 6, feed pipe, 7, feed mixing mechanism, 701, mixing pipe, 7011, spoiler, 702, gear one, 703, mixing motor, 704, gear two, 705, support plate, 706, feed pipe, 707, potassium chloride gas flow discharge pipe, 708, exhaust pipe, 709, air supplement pipe, 710, rotary joint, 8, fan. DETAILED DESCRIPTION

[0031] To further illustrate the embodiments, the utility model provides drawings, these drawings are part of the utility model disclosure, mainly used to illustrate the embodiment, and can cooperate with the relevant description of the specification to explain the operation principle of the embodiment, cooperating with reference to these contents, the person skilled in the art should understand other possible implementation modes and the advantages of the utility model, the components in the drawing are not drawn according to scale, and similar component symbols are usually used to indicate similar components.

[0032] According to the embodiment of the utility model, a purification device for potassium chloride raw materials is provided.

[0033] The utility model is further illustrated in conjunction with the drawings and specific embodiments, as Figures 1-6 The purification device for potassium chloride raw materials according to the embodiment of the utility model, as shown in the drawing, includes support frame 1, the top of support frame 1 is provided with potassium chloride purification tank 2, the bottom of potassium chloride purification tank 2 is provided with discharge pipe 3, one end of discharge pipe 3 is provided with screening mechanism 4, the top middle of potassium chloride purification tank 2 is provided with exhaust cylinder 5, the outside top of potassium chloride purification tank 2 is provided with feed pipe 6, one end of feed pipe 6 is provided with feed mixing mechanism 7, one side of screening mechanism 4 is provided with fan 8.

[0034] It needs to be explained that the bypass air blowing process is used in the utility model, the hot gas of about 1100 DEG C is extracted and filtered twice at high temperature to remove dust, the high-temperature gas with dust content lower than 1000 ppm enters the purification device of the potassium chloride raw material, first, the high-temperature gas containing potassium chloride crystal nucleus is mixed with cold air outside and is blown into the high-temperature gas passage, so that the ambient temperature is reduced to about 300 DEG C, at this time, the potassium chloride vapor obtains a crystallization supercooling degree of more than 450 DEG C and preferentially crystallizes and grows on the potassium chloride crystal nucleus, due to the difference in surface area and lattice constant; the probability and growth rate of the potassium chloride vapor crystallizing on the potassium chloride crystal nucleus are three orders of magnitude greater than that of calcium oxide, with the incubation and growth of the potassium chloride in the air duct and the crystallization cavity, the particle size of the potassium chloride particles is more than 100 times different from that of the calcium oxide particles; the millimeter-level potassium chloride particles are separated from the micron-level calcium oxide particles by using a conventional method (sieving and filtering), and high-purity potassium chloride crystalline particles are obtained.

[0035] Among them, the bypass air blowing technology adopts two-stage dust removal treatment, the first-stage cyclone collects about 70% of the dust in the bypass air blowing. At this time, the chloride ions are in a gaseous state and have not attached to the dust, and only about 20% of the chloride ions are collected here. Therefore, the kiln dust collected by the first-stage cyclone can be recycled to the kiln to reduce the loss of materials and energy. The flue gas at the outlet of the first-stage cyclone enters the subsequent fine powder cyclone, at this time, as the temperature decreases, most of the chloride ions have attached to the kiln dust, and the second-stage cyclone collects about 30% of the remaining dust and about 80% of the chloride in the bypass air blowing. This part of the kiln dust is less and contains a large amount of chloride ions and heavy metals.

[0036] By means of the above technical scheme of the utility model, the utility model is reasonable and reliable in structure, the purification device of the potassium chloride raw material optimizes the purification process of the potassium chloride by controlling the temperature of the potassium chloride gas flow and introducing the crystallization supercooling degree, and can improve the efficiency of crystallization and product quality.

[0037] In one embodiment, for the above-mentioned screening mechanism 4, the screening mechanism 4 comprises a screening shell 401 arranged at one end of the discharge pipe 3, a screening cylinder 402 is arranged in the screening shell 401, one end of the screening shell 401 is provided with an extension cylinder 403, and a discharge pipe 404 is arranged at the outer bottom of the extension cylinder 403; one end of the extension cylinder 403 is provided with a driving motor 405, the output shaft of the driving motor 405 penetrates the inner wall of the screening cylinder 402 and is provided with an auger 406; the bottom end of the screening shell 401 is arranged in a conical structure, and the bottom end of the screening shell 401 is connected with the fan 8 through a connecting pipe 407.

[0038] The working principle of the screening mechanism 4 is that the formed potassium chloride particles enter the inside of the screening shell 401 through the discharge pipe 3, then the formed potassium chloride particles are gradually conveyed to one end of the discharge pipe 404 by driving the auger 406 to rotate by the driving motor 405, then the potassium chloride particles can be recycled, at the same time, part of the unremoved gas and the smaller particles of the potassium chloride particles fall into the connecting pipe 407 through the screening cylinder 402, then part of the unremoved gas and the smaller particles of the potassium chloride particles can be sent into the feeding mixing mechanism 7 by the fan 8.

[0039] In one embodiment, for the above-mentioned exhaust cylinder 5, the bottom end of the exhaust cylinder 5 is located in the inside of the potassium chloride purification tank 2, and a plurality of spiral guide vanes 501 are arranged on the outside of the bottom of the exhaust cylinder 5.

[0040] In one embodiment, for the above-mentioned feeding mixing mechanism 7, one end of the feeding mixing mechanism 7 is provided with a mixing pipe 701, the outside of the mixing pipe 701 is provided with a gear one 702, the bottom end of the gear one 702 is provided with a mixing motor 703, one end of the output shaft of the mixing motor 703 is provided with a gear two 704 engaged with the gear one 702, the bottom end of the mixing motor 703 is provided with a support plate 705 connected with the potassium chloride purification tank 2; one end of the mixing pipe 701 is provided with a feeding pipe 706, one end of the feeding pipe 706 is provided with a potassium chloride gas flow discharge pipe 707, the bottom end of the feeding pipe 706 is provided with an air outlet pipe 708 connected with the fan 8, the outside of the air outlet pipe 708 is provided with a gas supplement pipe 709; the inner wall of the mixing pipe 701 is provided with a plurality of spoiler plates 7011, and the cross section of the spoiler plates 7011 is spiral; the end of the mixing pipe 701 is connected with the feeding pipe 706 and the feeding pipe 6 through a rotary joint 710.

[0041] The working principle of the feeding mixing mechanism 7 is that after part of the unremoved gas and the smaller particles of the potassium chloride particles are sent into the air outlet pipe 708 by the fan 8, the external air is also introduced into the air outlet pipe 708 through the gas supplement pipe 709 and sent into the feeding pipe 706, then the high-temperature gas containing potassium chloride after two-stage dust removal treatment is sent into the potassium chloride gas flow discharge pipe 707, the high-temperature gas containing potassium chloride after two-stage dust removal treatment is preliminarily mixed with the external air and part of the unremoved gas and the smaller particles of the potassium chloride particles, then the high-temperature gas is cooled by driving the gear two 704 to rotate by the mixing motor 703, the mixing pipe 701 is driven to rotate under the engagement of the gear one 702 and the gear two 704, and the spoiler plates 7011 preliminarily mix the gas in the mixing pipe 701, then the high-temperature gas is cooled and enters the potassium chloride purification tank 2 through the feeding pipe 6 for potassium chloride purification treatment.

[0042] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process is explained in detail.

[0043] In actual application, firstly, the high-temperature gas containing potassium chloride after two-stage dust removal treatment is introduced into the material mixing mechanism 7, then the fan 8 introduces the cold air in the air into the material mixing mechanism 7, and the high-temperature gas containing potassium chloride after two-stage dust removal treatment is preliminarily mixed with the cold air gas through the material mixing mechanism 7, which reduces the ambient temperature, at this time, the potassium chloride in the high-temperature gas obtains crystallization supercooling degree, so that the potassium chloride is crystallized and forms potassium chloride particles, therefore, the potassium chloride gradually nucleates and grows in the inside of the potassium chloride purification tank 2, and the particle size of the potassium chloride particles is more than 100 times different from that of the calcium oxide particles, then the gas is introduced into the potassium chloride purification tank 2 through cyclone, and under the action of the spiral guide vane 501, the gas forms the potassium chloride particles to perform centrifugal motion, therefore, the potassium chloride particles gradually sink and enter the screening mechanism 4 through the discharge pipe 3, and the excess gas is discharged through the exhaust cylinder 5, and the potassium chloride particles are screened through the screening mechanism 4, part of the gas not discharged and the smaller particles of the potassium chloride particles are re-sent to the material mixing mechanism 7 through the fan 8 to be treated again.

[0044] In summary, by means of the above technical scheme of the utility model, the utility model has reasonable and reliable structure, the purification device for the potassium chloride raw material optimizes the purification process of the potassium chloride by controlling the temperature of the potassium chloride gas flow and introducing the crystallization supercooling degree, and can improve the crystallization efficiency and product quality. By arranging the screening mechanism 4, the screening of the potassium chloride particles is realized, and efficient particle size separation can be realized through the cooperation of the screening shell 401 and the screening cylinder 402, the larger potassium chloride crystalline particles can be effectively screened out, the auger 406 can smoothly discharge the screened material, and the accumulation and blockage are reduced. By arranging the exhaust cylinder 5, the excess gas flow in the potassium chloride purification tank 2 can be effectively discharged, and the gas flow direction can be effectively controlled through the spiral guide vane 501, so that the gas flow in the inside of the purification tank is more uniform, the potassium chloride can be quickly crystallized to form potassium chloride particles, and the purification efficiency of the potassium chloride is realized. By arranging the material mixing mechanism 7, the supercooling degree of the potassium chloride gas flow is realized, the high-temperature potassium chloride gas flow in the inside of the mixing pipe 701 can be mixed with the cold air under the drive of the mixing motor 703, the temperature is reduced, the potassium chloride vapor can obtain the crystallization supercooling degree, and the crystallization of the potassium chloride is facilitated.

[0045] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "screw connection" and so on term should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication or the interaction relationship of two elements inside two elements, unless another definite limitation, for the ordinary skill in the art, can understand the specific meaning of the above-mentioned term in the utility model according to the specific situation.

[0046] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A purification device for potassium chloride raw material comprising a support frame (1), characterized in that, The top end of the support frame (1) is provided with a potassium chloride purification tank (2), the bottom end of the potassium chloride purification tank (2) is provided with a discharge pipe (3), one end of the discharge pipe (3) is provided with a screening mechanism (4); The middle of the top end of the potassium chloride purification tank (2) is provided with an exhaust cylinder (5), the outside top of the potassium chloride purification tank (2) is provided with a feeding pipe (6), one end of the feeding pipe (6) is provided with a feeding mixing mechanism (7); One side of the screening mechanism (4) is provided with a fan (8).

2. The purification device for potassium chloride raw material according to claim 1, characterized by The screening mechanism (4) comprises a screening shell (401) provided at one end of the discharge pipe (3), the inside of the screening shell (401) is provided with a screening cylinder (402), one end of the screening shell (401) is provided with an extension cylinder (403), the outside bottom of the extension cylinder (403) is provided with a discharge pipe (404); One end of the extension cylinder (403) is provided with a driving motor (405), the output shaft of the driving motor (405) penetrates the inner wall of the screening cylinder (402) and is provided with an auger (406).

3. The purification device for potassium chloride raw material according to claim 2, characterized by The bottom end of the screening shell (401) is provided in a conical structure, and the bottom end of the screening shell (401) is connected with the fan (8) through a connecting pipe (407).

4. The purification device for potassium chloride raw material according to claim 1, characterized by The bottom end of the exhaust cylinder (5) is located inside the potassium chloride purification tank (2), and the bottom outside of the exhaust cylinder (5) is provided with a plurality of spiral guide vanes (501).

5. The apparatus for purifying potassium chloride raw material according to claim 1, characterized by One end of the feeding mixing mechanism (7) is provided with a mixing pipe (701), the outside of the mixing pipe (701) is provided with a gear one (702), the bottom end of the gear one (702) is provided with a mixing motor (703), one end of the output shaft of the mixing motor (703) is provided with a gear two (704) engaged with the gear one (702), the bottom end of the mixing motor (703) is provided with a support plate (705) connected with the potassium chloride purification tank (2); One end of the mixing pipe (701) is provided with a feeding pipe (706), one end of the feeding pipe (706) is provided with a potassium chloride gas flow discharge pipe (707), the bottom end of the feeding pipe (706) is provided with an air outlet pipe (708) connected with the fan (8), the outside of the air outlet pipe (708) is provided with a gas supplement pipe (709).

6. The apparatus for purifying potassium chloride raw material according to claim 5, wherein The inner wall of the mixing pipe (701) is provided with a plurality of spoiler plates (7011), and the cross section of the spoiler plates (7011) is spiral.

7. The apparatus for purifying potassium chloride raw material according to claim 6, characterized by The end of the mixing pipe (701) is connected with the feeding pipe (706) and the feeding pipe (6) through a rotary joint (710).

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