Method and device for preparing online round particle ammonium chloride

Abstract

The invention belongs to the technical field of agricultural fertilizers, and particularly relates to an on-line preparation method and device of round granular ammonium chloride, and the method comprises the following steps: S1, adding urea and formalin solution into a special reaction kettle on line, heating to 60-100 DEG C, and reacting for 30-90 minutes to generate a reaction solution; s2, carrying out a condensation reaction on the reaction solution under an acidic condition, spraying the reaction solution into a granulator, setting the granulation temperature to be 40-65 DEG C, adding powdery ammonium chloride and a granulation auxiliary agent, and carrying out mixing granulation, so that a reaction product is cured into spherical particles with different sizes; and S3, drying the spherical particles at the drying air temperature of 70-140 DEG C until the moisture content of the material is less than 1.0%, cooling, screening, and selecting 2-4mm particles to obtain the spherical ammonium chloride. According to the invention, the material is easier to balling, the liquid phase required by granulation is obviously reduced, the water content of granulation is reduced, and the drying difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural fertilizers, in particular to an online manufacturing method and device for round granular ammonium chloride. Background Art

[0002] At present, the domestic ammonium chloride production capacity is about 15 million tons / year, most of which is used in agriculture. As a quick-acting nitrogen fertilizer, the nitrogen content is above 25%, suitable for neutral and alkaline soils, and wheat, corn, cotton, and most other crops also have obvious yield increase and quality effects. However, agricultural ammonium chloride fertilizers are generally in powder or small granular form, and are rarely used alone in agriculture. Most of them can only be used for compound fertilizer production, not for BB fertilizer (blended fertilizer). Therefore, granulating powdered ammonium chloride can solve the problem of using it for BB fertilizer. In the future, the country will advocate green agriculture and zero growth of chemical fertilizers, and will develop around fertilizer efficiency, microorganisms, and soil improvement. Relying on this direction, more functional products can continue to be developed and extended.

[0003] With the development of agricultural mechanization, the amount of granular ammonium chloride used in the production of BB fertilizer has gradually increased. However, the existing production process of granular ammonium chloride is generally an extrusion process, and its shortcomings have gradually been exposed. The particles are irregular and uneven, and the particles are angular. During the production and storage of BB fertilizer, friction and extrusion will produce debris and powder, which is not conducive to uniform mixing in BB fertilizer and mechanical fertilization of BB fertilizer. At the same time, the edges and corners of the extruded ammonium chloride particles can easily scratch the controlled-release coating of the urea coated in the BB fertilizer, resulting in a reduction in the controlled-release effect.

[0004] To this end, the present invention provides a method and device for producing online round granular ammonium chloride. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: the method for producing an online round granular ammonium chloride according to the present invention comprises the following steps:

[0007] S1: Add urea and formalin solution into a special reactor online, heat to 60-100°C for reaction, the reaction time is 30-90 minutes, and generate a reaction solution;

[0008] S2: The reaction solution is subjected to condensation reaction under acidic conditions and sprayed into a granulator. The granulation temperature is set at 40-65°C, and powdered ammonium chloride and a granulation aid are added for mixing and granulation, so that the reaction product is solidified into spherical particles of different sizes;

[0009] S3: drying the spherical particles at a drying air temperature of 70-140°C until the moisture content of the material is less than 1.0%, cooling and screening the particles to select 2-4 mm particles, thus obtaining round granular ammonium chloride.

[0010] Preferably, the specific operating steps of the granulator in step S2 are:

[0011] W1: Powdered ammonium chloride and granulation aids are added into the granulation bin through the feed port, the reaction solution is transported by a metering pump and a feed pipe, and sprayed into the granulation bin through an atomizing nozzle, and then the material is driven to tumble and roll in the granulation bin through the stirring component to gradually form ammonium chloride particles;

[0012] W2: Turn on the switch assembly, and the material inside the granulation bin enters the particle path of the spiral path and continues to roll down on the surface of the spiral plate;

[0013] W3: The motor drives the rotating shaft and the magnetic rod to rotate, and the magnetic attraction and the spring are used to make the induction block and the elastic part move back and forth continuously inside the particle channel;

[0014] W4: Ammonium chloride powder enters the powder channel through the separation holes on the surface of the spiral plate to separate the particles from the powder. Two containers are used to receive the ammonium chloride particles and powder at the bottom of the spiral channel respectively.

[0015] Preferably, the amount of raw materials added in steps S1 and S2 is 90-150 kg / t of urea, 15-30 kg / t of formalin solution, 0-15 kg / t of water, 10-100 kg / t of granulation aid, and 600-900 kg / t of powdered ammonium chloride; the granulation aid is any one of clay, attapulgite, bentonite, and travertine powder, or a mixture thereof.

[0016] Preferably, trace elements are added in step S1; the trace elements are boron, zinc and potassium humate, and the added amounts are 10-30 kg / t of boron, 5-15 kg / t of zinc, and 1.5-5 kg / t of potassium humate.

[0017] Preferably, an anti-caking agent is added to the round granular ammonium chloride obtained in step S3 for anti-caking treatment; the anti-caking agent is anti-caking oil and anti-caking powder, and the added amount is 2-4 kg / t for anti-caking oil and 6-12 kg / t for anti-caking powder.

[0018] A device for manufacturing online round granular ammonium chloride, which is applied to the above-mentioned method for manufacturing online round granular ammonium chloride, wherein the granulator in step S2 includes a granulation bin; a stand is fixedly connected to the outside of the granulation bin; a feed port and a feed pipe are arranged on the top of the granulation bin; a stirring assembly and an atomizing nozzle are arranged inside the granulation bin, and the atomizing nozzle is connected to the feed pipe; a spiral path is fixedly connected to the lower side of the granulation bin; a switch assembly is connected between the top of the spiral path and the granulation bin; a spiral plate is fixedly connected to the inside of the spiral path; a group of separation holes are evenly distributed on the surface of the spiral plate; the spiral plate divides the spiral path into a particle path at the top and a powder path at the bottom.

[0019] Preferably, a guide trough plate is fixedly connected to the bottom of the spiral channel at a position corresponding to the particle channel; and the cross-section of the guide trough plate is designed in a "U" shape.

[0020] Preferably, a mounting seat is provided under the spiral path, and the mounting seat is fixedly connected to the stand through a bracket; a motor is fixedly connected to the surface of the mounting seat; a rotating shaft is rotatably connected between the mounting seat and the granulation bin, and the rotating shaft is driven by the motor; a group of magnetic rods are evenly fixedly connected to the surface of the rotating shaft through a connecting rod; a group of interference components are evenly distributed inside the particle path; the interference components include a pair of mounting blocks; guide rods are fixedly connected between the mounting blocks; guide blocks are slidably connected to the surface of the guide rods; a spring is fixedly connected between the guide block and the mounting block; an induction block is fixedly connected to the lower side of the guide block, and the induction block and the magnetic rod attract each other when they are close to each other; plate-shaped elastic parts are fixedly connected to both sides of the induction block.

[0021] Preferably, the interior of the elastic member is hollow in design; a second spring is fixedly connected to the interior of the elastic member; and a group of air holes are evenly distributed on the lower side of the elastic member.

[0022] Preferably, the spiral plate is elastic; a paddle is fixedly connected to the lower side of the induction block; and a spring is fixedly connected to the upper side of the spiral plate at a position corresponding to the paddle.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The present invention uses powdered ammonium chloride as the main raw material, uses urea formalin reaction granulation to prepare spherical ammonium chloride particles, and the content of slow-release nitrogen is 1.5% to 2%.

[0025] 2. The present invention improves the ball formation rate of the product, and the manufacturing method is efficient, energy-saving, and environmentally friendly. The ammonium chloride particles produced have high strength, a smooth appearance, and uniform particle size.

[0026] 3. The present invention improves the granulation temperature through online quantitative control, so that the material balling rate is greatly improved, the liquid phase required for granulation is significantly reduced, the granulation moisture is low, the drying difficulty is reduced, the drying consumption is reduced, the production cost is reduced, and it is suitable for large-scale production with significant economic benefits.

[0027] 4. The round granular ammonium chloride produced by the present invention solves the problem that it is difficult to add trace elements to traditional BB fertilizers. Trace elements and other nutritional additives can be added to BB fertilizers, thereby enhancing the fertilizer effect of the product.

[0028] 5. After granulation by the granulator, the present invention allows the material to enter the particle channel of the spiral channel and further roll and shape on the surface of the spiral plate. Due to the special shape design of the spiral channel, the rolling time of the material inside the particle channel can be extended as much as possible, so that some irregularly shaped ammonium chloride particles tend to be spherical, and unformed powdered ammonium chloride is inevitably present in the particles exported from the granulation bin. Therefore, during the movement of the material inside the particle channel, the ammonium chloride powder can enter the powder channel through the separation holes on the surface of the spiral plate to achieve separation of particles and powder. Two containers are used to receive the ammonium chloride particles and powder at the bottom of the spiral channel, respectively, which not only reduces the residue content of the finished ammonium chloride particles, but also facilitates the extraction of the unformed ammonium chloride powder, which is subsequently returned to the granulation bin for secondary granulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a flow chart of the method for producing round granular ammonium chloride in the present invention;

[0031] Figure 2 It is a flow chart of the operating steps of the granulator in the present invention;

[0032] Figure 3 It is a structural schematic diagram of a granulator in the present invention;

[0033] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0034] Figure 5 It is a schematic diagram of the structure of the spiral track in the present invention;

[0035] Figure 6 It is a structural schematic diagram of the spiral plate in the present invention;

[0036] Figure 7 It is a front view of the granulator in the present invention;

[0037] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0038] Fig. 9 yes Figure 8 A partial enlarged view of point C in the middle.

[0039] In the figure: granulation bin 1, stand 2, feed port 3, feed pipe 4, spiral channel 5, switch assembly 6, spiral plate 7, separation hole 8, particle channel 9, powder channel 10, guide channel plate 11, mounting seat 12, motor 13, rotating shaft 14, magnetic rod 15, mounting block 16, guide rod 17, guide block 18, spring 1 19, induction block 20, elastic member 21, spring 2 22, air hole 23, paddle 24, spring 25. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figure 1 to Figure 2 As shown, the method for producing an online round granular ammonium chloride according to the present invention comprises the following steps:

[0042] S1: Add urea and formalin solution into a special reactor online, heat to 60-100°C for reaction, the reaction time is 30-90 minutes, and generate a reaction solution;

[0043] S2: The reaction solution is subjected to condensation reaction under acidic conditions, sprayed into a granulator, a granulation aid is added, the granulation temperature is set at 40-65°C, powdered ammonium chloride is added with an electronic belt scale for mixing and granulation, and the reaction product is solidified into spherical particles of different sizes;

[0044] S3: drying the spherical particles at a drying air temperature of 70-140°C until the moisture content of the material is less than 1.0%, cooling and screening the particles to select 2-4 mm particles, thus obtaining round granular ammonium chloride.

[0045] The specific operation steps of the granulator described in step S2 are:

[0046] W1: Powdered ammonium chloride and granulation aids are added into the granulation bin 1 through the feed port 3, the reaction solution is transported by the metering pump and the feed pipe 4, and sprayed into the granulation bin 1 through the atomizing nozzle, and then the material is driven to tumble and roll in the granulation bin 1 through the stirring component to gradually form ammonium chloride particles;

[0047] W2: The switch assembly 6 is turned on, and the material inside the granulation bin 1 enters the particle path 9 of the spiral path 5 and continues to roll downward on the surface of the spiral plate 7;

[0048] W3: The motor 13 drives the rotating shaft 14 and the magnetic rod 15 to rotate, and the magnetic attraction and the spring 19 cooperate to cause the induction block 20 and the elastic member 21 to continuously reciprocate inside the particle channel 9;

[0049] W4: The ammonium chloride powder enters the powder channel 10 through the separation hole 8 on the surface of the spiral plate 7 to separate the particles from the powder. Two containers are used to receive the ammonium chloride particles and the powder at the bottom of the spiral channel 5 respectively.

[0050] The raw materials added in steps S1 and S2 are 90-150 kg / t of urea, 15-30 kg / t of formalin solution, 0-15 kg / t of water, 10-100 kg / t of granulation aid, and 600-900 kg / t of powdered ammonium chloride; the concentration of the formalin solution is 36.5%; the granulation aid is any one of clay, attapulgite, bentonite, and travertine powder, or a mixture thereof.

[0051] In step S1, trace elements are added; the trace elements are boron, zinc and potassium humate, and the added amounts are 10-30 kg / t of boron, 5-15 kg / t of zinc, and 1.5-5 kg / t of potassium humate.

[0052] An anti-caking agent is added to the round granular ammonium chloride obtained in step S3 to perform anti-caking treatment; the anti-caking agent is an anti-oil and anti-powder agent, and the added amount is 2-4 kg / t for anti-oil and 6-12 kg / t for anti-powder; the added anti-caking agent can improve the anti-moisture absorption and anti-caking properties of the granular ammonium chloride product.

[0053] The invention is beneficial to improving the material balling rate and the continuous stability of production and processing by online reaction, stable supply by a metering pump and control of the granulation temperature. In order to cope with the problem of softening of granules in the production process of ammonium chloride round particles, the invention utilizes the viscosity promoting effect of the reaction liquid to synergistically increase the granulation temperature and the strength of the granules, so that the material is easier to be balled, the liquid phase required for granulation is significantly reduced, the moisture content of granulation is reduced, the difficulty of drying is reduced, and the obtained finished ammonium chloride particles are smoother.

[0054] There is a lack of similar production of round granular ammonium chloride in the market, and the cost is not much different from that of extruded granular ammonium chloride. The addition of round granular ammonium chloride to BB fertilizer improves the shape of the particles from irregular to spherical, and ammonium chloride contains both slow-release nitrogen and fast-acting nitrogen. After being put on the market, the quality of the product has been improved, making the product highly differentiated.

[0055] Compared with the traditional process, in the traditional process, the moisture content of the particles is as high as 5% to 7% during the production process, and a high energy consumption is required during the drying process. The particles obtained by this production process have a moisture content of less than 2.5%. During the drying process, a low drying temperature can be used for drying, which effectively reduces energy consumption and reduces production costs.

[0056] When adding trace elements to traditional BB fertilizer, it is difficult to mix due to the small amount, easy stratification and unevenness, and it is not easy to achieve uniform mixing. However, the present invention adds trace elements during the batching process to fully generate a reaction solution, so that the trace elements can be evenly distributed in the round ammonium chloride particles during the granulation process.

[0057] After the ammonium chloride granules are transported to the drying equipment, they are dried with drying air at 70-140℃ to reduce moisture. The drying air passes through dust removal and deodorization equipment and is purified before being discharged into the atmosphere. The dried material enters the cooling and screening equipment, where 2-4mm particles are screened out as qualified finished product particles. After anti-caking treatment, they are transported to the finished product warehouse and packaged for storage.

[0058] The unqualified particles after screening are crushed and returned to the granulator for secondary granulation.

[0059] like Figures 3 to 9 As shown, an online round granular ammonium chloride manufacturing device described in the present invention is applied to the above-mentioned online round granular ammonium chloride manufacturing method, and the granulator in step S2 includes a granulation bin 1; a stand 2 is fixedly connected to the outside of the granulation bin 1; a feed port 3 and a feed pipe 4 are arranged on the top of the granulation bin 1; a stirring assembly and an atomizing nozzle are arranged inside the granulation bin 1, and the atomizing nozzle is connected to the feed pipe 4, and the stirring assembly and the atomizing nozzle are prior art, not shown in the figure; a spiral path 5 is fixedly connected to the lower side of the granulation bin 1; a switch assembly 6 is connected between the top of the spiral path 5 and the granulation bin 1; a spiral plate 7 is fixedly connected to the inside of the spiral path 5; a group of separation holes 8 are evenly distributed on the surface of the spiral plate 7, and the size of the separation holes 8 is smaller than that of normal finished ammonium chloride particles; the spiral plate 7 divides the spiral path 5 into a particle path 9 at the top and a powder path 10 at the bottom.

[0060] When in use, powdered ammonium chloride and granulation aids are added into the granulation bin 1 through the feed port 3, the reaction solution is transported by the metering pump and the feed pipe 4, and sprayed into the granulation bin 1 through the atomizing nozzle, and then the material is driven to tumble and roll in the granulation bin 1 through the stirring component to gradually form ammonium chloride particles, and then the switch component 6 is opened, and the material in the granulation bin 1 enters the particle channel 9 of the spiral channel 5, and is further rolled and formed on the surface of the spiral plate 7. Due to the special shape design of the spiral channel 5, the rolling time of the material in the particle channel 9 can be prolonged as much as possible, so that part of the material can be rolled into the particle channel 9. The irregularly shaped ammonium chloride particles tend to be spherical, and unformed powdered ammonium chloride is inevitably present in the particles discharged from the granulation bin 1. Therefore, during the movement of the material inside the particle channel 9, the ammonium chloride powder can enter the powder channel 10 through the separation holes 8 on the surface of the spiral plate 7 to achieve separation of particles and powder. Two containers are used to receive the ammonium chloride particles and powder at the bottom of the spiral channel 5 respectively, which not only reduces the residue content of the finished ammonium chloride particles, but also facilitates the extraction of the unformed ammonium chloride powder, which is then returned to the granulation bin 1 for secondary granulation.

[0061] The bottom of the spiral channel 5 is fixedly connected with a guide groove plate 11 at a position corresponding to the particle channel 9; the cross section of the guide groove plate 11 is designed in a "U" shape. The guide groove plate 11 is provided to guide the ammonium chloride particles in the particle channel 9, so that the materials discharged from the particle channel 9 and the powder channel 10 can fall at different positions, so that the ammonium chloride particles and powder can be received by containers respectively, thereby improving the practicality of the device.

[0062] A mounting seat 12 is provided below the spiral path 5, and the mounting seat 12 is fixedly connected to the stand 2 through a bracket; a motor 13 is fixedly connected to the surface of the mounting seat 12; a rotating shaft 14 is rotatably connected between the mounting seat 12 and the granulation bin 1, and the rotating shaft 14 is driven by the motor 13; a group of magnetic rods 15 are evenly and fixedly connected to the surface of the rotating shaft 14 through a connecting rod; a group of interference components are evenly distributed at intervals inside the particle path 9; the interference components include a pair of mounting blocks 16; a guide rod 17 is fixedly connected between the mounting blocks 16; a guide block 18 is slidably connected to the surface of the guide rod 17; a spring 19 is fixedly connected between the guide block 18 and the mounting block 16; an induction block 20 is fixedly connected to the lower side of the guide block 18, and the induction block 20 and the magnetic rod 15 attract each other when they are close; plate-shaped elastic members 21 are fixedly connected to both sides of the induction block 20.

[0063] After the switch assembly 6 is turned on, the motor 13 drives the rotating shaft 14 and multiple magnetic rods 15 to rotate. When the magnetic rod 15 passes over the interference assembly, the magnetic rod 15 can attract the induction block 20 and drive the elastic member 21 to move toward the center of the spiral path 5 through the induction block 20. When the magnetic rod 15 moves away, the spring 19 drives the induction block 20 to reset to the outside of the spiral path 5, so that the elastic member 21 can continue to move along the width direction inside the particle path 9. On the one hand, the ammonium chloride particles inside the particle path 9 are interfered with and the falling process is slowed down, thereby achieving full separation of particles and powder. On the other hand, the elastic member 21 can continuously rub the particles on its lower side during the lateral movement, promote the particles to form a spherical shape, and further improve the roundness of the particles. Third, the elastic member 21 can disperse and flatten the material on the surface of the spiral plate 7 to both sides to prevent the material from being concentrated and accumulated at a certain place on the spiral plate 7, thereby fully improving the utilization of the spiral plate 7 and the separation efficiency between particles and powder.

[0064] During the movement of the induction block 20 , the guide block 18 slides synchronously on the surface of the guide rod 17 to guide and limit the movement of the induction block 20 , thereby improving the stability of the interference component during operation.

[0065] The elastic member 21 is hollow in design; a spring 22 is fixedly connected to the elastic member 21; and a group of air holes 23 are evenly distributed on the lower side of the elastic member 21. The elastic member 21 will hit the side wall surface of the particle channel 9 during movement, and then the air inside the elastic member 21 is squeezed out through the air holes 23 at the bottom, blowing the material on the surface of the spiral plate 7, blowing off the powder adhering to the surface of the ammonium chloride particles, and impacting the particles with airflows at multiple angles, increasing the randomness of the direction of the particles when rolling, improving the uniformity and consistency of the particle forming, and further ensuring the granulation quality of the ammonium chloride.

[0066] The spiral plate 7 is elastic; a paddle 24 is fixedly connected to the lower side of the induction block 20; and a spring 25 is fixedly connected to the upper side of the spiral plate 7 at a position corresponding to the paddle 24. During the movement, the induction block 20 intermittently paddles the spring 25 through the paddle 24, and the spring 25 drives the spiral plate 7 to vibrate, thereby driving the material on its surface to vibrate and bounce continuously. On the one hand, the separation efficiency between the ammonium chloride particles and the powder can be improved, and the adhesion between the two can be further prevented. On the other hand, the vibration can prevent the material from being blocked at a certain place in the particle channel 9 or the powder from blocking the separation hole 8, thereby ensuring the operation stability of the device.

[0067] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0068] Example 1

[0069] 90kg / t urea measured by a belt scale, 15kg / t formalin solution measured by a flow meter and 0-5kg / t water are transported to a special reactor in turn, heated to 60-75℃ for reaction, the reaction time is 60min, a reaction solution is generated, and then it is transported through a special pipeline and sprayed into a granulator, 70kg / t granulation aid measured by a belt scale is added for granulation, the granulation temperature is 50℃, 800kg / t powdered ammonium chloride measured by a belt scale is added to the granulator, and the reaction product is solidified into round particles of different sizes; the round ammonium chloride particles are transported to a drying device, dried at 90℃ to reduce the moisture, and then sent to a cooling and screening device, 2-4mm particles are screened and selected as qualified finished particles, that is, round ammonium chloride particles are obtained, an anti-caking agent is added, 2kg / t of anti-caking oil and 6kg / t of anti-caking powder are added through a wrapping device, and after anti-caking treatment, they are transported to a finished product warehouse for packaging and storage.

[0070] Example 2

[0071] The measured 100kg / t urea, 20kg / t formalin solution and 0-10kg / t water are transported to a special reactor in turn, heated to 70-80℃ for reaction, the reaction time is 50-60min, a reaction solution is generated, and then it is transported through a special pipeline and sprayed into a granulator, 80kg / t granulation aid is added for granulation, the granulation temperature is 50℃, 750kg / t powdered ammonium chloride is added to the granulator, and the reaction product is solidified into round particles of different sizes; the round ammonium chloride particles are transported to a drying device, dried at 95℃ to reduce the moisture, and then sent to a cooling and screening device, 2-4mm particles are screened and selected as qualified finished product particles, that is, ammonium chloride round particles are obtained, an anti-caking agent is added, 3kg / t of anti-caking oil and 9kg / t of anti-caking powder are added through a wrapping device, and after anti-caking treatment, they are transported to a finished product storage warehouse for packaging and storage.

[0072] Example 3

[0073] The measured 120kg / t urea, 25kg / t formalin solution and 0-12kg / t water are transported to a special reactor in turn, heated to 80-85℃ for reaction, the reaction time is 40-55min, a reaction solution is generated, and then it is transported through a special pipeline and sprayed into a granulator, 90kg / t granulation aid is added for granulation, the granulation temperature is 50℃, 650kg / t powdered ammonium chloride is added to the granulator, and the reaction product is solidified into round particles of different sizes; the round ammonium chloride particles are transported to a drying device, dried at 100℃ to reduce the moisture, and then sent to a cooling and screening device, 2-4mm particles are screened and selected as qualified finished product particles, that is, ammonium chloride round particles are obtained, anti-caking agent anti-caking oil 4kg / t anti-caking powder 12kg / t are added, and after anti-caking treatment, they are transported to the finished product warehouse for packaging and storage.

[0074] Example 4

[0075] The measured 150kg / t urea, 30kg / t formalin solution and 0-15kg / t water are transported to a special reactor in turn, heated to 90-95℃ for reaction, the reaction time is 30-50min, a reaction solution is generated, and then it is transported through a special pipeline and sprayed into a granulator, 100kg / t granulation aid is added for granulation, the granulation temperature is 50℃, 600kg / t powdered ammonium chloride is added to the granulator, and the reaction product is solidified into round particles of different sizes; the round ammonium chloride particles are transported to a drying device, dried at 110-140℃ to reduce the moisture, and then sent to a cooling and screening device, 2-4mm particles are screened and selected as qualified finished product particles, that is, ammonium chloride round particles are obtained, anti-caking agent anti-caking oil 4kg / t anti-caking powder 12kg / t are added, and after anti-caking treatment, they are transported to the finished product warehouse for packaging and storage.

[0076] The characteristics of the finished product of round granular ammonium chloride prepared in the embodiment of the present invention were tested according to the experimental methods in the national standard GB15063. The results are as follows:

[0077]

[0078] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for producing online round granular ammonium chloride, characterized in that: The following steps are involved: S1: Add urea and formalin solution into a special reactor online, heat to 60-100°C for reaction, the reaction time is 30-90 minutes, and generate a reaction solution; S2: The reaction solution is subjected to condensation reaction under acidic conditions and sprayed into a granulator. The granulation temperature is set at 40-65°C, and powdered ammonium chloride and a granulation aid are added for mixing and granulation, so that the reaction product is solidified into spherical particles of different sizes; S3: drying the spherical particles at a drying air temperature of 70-140°C until the moisture content of the material is less than 1.0%, cooling and screening the particles to select 2-4 mm particles, thus obtaining round granular ammonium chloride.

2. The method for producing online round granular ammonium chloride according to claim 1, characterized in that: The specific operation steps of the granulator described in step S2 are: W1: Powdered ammonium chloride and granulation aids are added into the granulation bin (1) through the feed port (3), the reaction solution is transported by a metering pump and a feed pipe (4), and sprayed into the granulation bin (1) through an atomizing nozzle, and then the material is driven to tumble and roll in the granulation bin (1) through a stirring component, gradually forming ammonium chloride particles; W2: The switch assembly (6) is opened, and the material inside the granulation bin (1) enters the particle path (9) of the spiral path (5), and continues to roll downward on the surface of the spiral plate (7); W3: The motor (13) drives the rotating shaft (14) and the magnetic rod (15) to rotate, and the magnetic attraction and the spring (19) cooperate to cause the induction block (20) and the elastic member (21) to continuously reciprocate inside the particle channel (9); W4: The ammonium chloride powder enters the powder channel (10) through the separation hole (8) on the surface of the spiral plate (7), so that the particles and the powder are separated. Two containers are used at the bottom of the spiral channel (5) to receive the ammonium chloride particles and the powder respectively.

3. The method for producing online round granular ammonium chloride according to claim 1, characterized in that: The raw materials added in steps S1 and S2 are 90-150 kg / t of urea, 15-30 kg / t of formalin solution, 0-15 kg / t of water, 10-100 kg / t of granulation aid, and 600-900 kg / t of powdered ammonium chloride; the granulation aid is any one of clay, attapulgite, bentonite, and travertine powder, or a mixture thereof.

4. The method for producing online round granular ammonium chloride according to claim 1, characterized in that: In step S1, trace elements are added; the trace elements are boron, zinc and potassium humate, and the added amounts are 10-30 kg / t of boron, 5-15 kg / t of zinc, and 1.5-5 kg / t of potassium humate.

5. The method for producing online round granular ammonium chloride according to claim 1, characterized in that: An anti-caking agent is added to the round granular ammonium chloride obtained in step S3 to perform an anti-caking treatment; the anti-caking agent is an anti-caking oil and an anti-caking powder, and the addition amount thereof is 2-4 kg / t for anti-caking oil and 6-12 kg / t for anti-caking powder.

6. An online round granular ammonium chloride manufacturing device, which is applied to the online round granular ammonium chloride manufacturing method according to claim 2, characterized in that: The granulator in step S2 comprises a granulation bin (1); a stand (2) is fixedly connected to the outside of the granulation bin (1); a feed port (3) and a feed pipe (4) are arranged on the top of the granulation bin (1); a stirring assembly and an atomizing nozzle are arranged inside the granulation bin (1), and the atomizing nozzle is connected to the feed pipe (4); a spiral path (5) is fixedly connected to the lower side of the granulation bin (1); a switch assembly (6) is connected between the top of the spiral path (5) and the granulation bin (1); a spiral plate (7) is fixedly connected to the inside of the spiral path (5); a group of separation holes (8) are evenly distributed on the surface of the spiral plate (7); the spiral plate (7) divides the spiral path (5) into a particle path (9) at the top and a powder path (10) at the bottom.

7. The device for producing online round granular ammonium chloride according to claim 6, characterized in that: A guide channel plate (11) is fixedly connected to the bottom of the spiral channel (5) at a position corresponding to the particle channel (9); the cross section of the guide channel plate (11) is designed in a "U" shape.

8. The device for producing online round granular ammonium chloride according to claim 6, characterized in that: A mounting seat (12) is provided below the spiral path (5), and the mounting seat (12) is fixedly connected to the stand (2) via a bracket; a motor (13) is fixedly connected to the surface of the mounting seat (12); a rotating shaft (14) is rotatably connected between the mounting seat (12) and the granulation bin (1), and the rotating shaft (14) is driven by the motor (13); a group of magnetic rods (15) are evenly fixedly connected to the surface of the rotating shaft (14) via a connecting rod; a group of interference components are evenly distributed inside the particle path (9); The interference component comprises a pair of mounting blocks (16); a guide rod (17) is fixedly connected between the mounting blocks (16); a guide block (18) is slidably connected to the surface of the guide rod (17); a spring (19) is fixedly connected between the guide block (18) and the mounting block (16); a sensing block (20) is fixedly connected to the lower side of the guide block (18), and the sensing block (20) and the magnetic rod (15) attract each other when they are close to each other; and plate-shaped elastic members (21) are fixedly connected to both sides of the sensing block (20).

9. The device for producing online round granular ammonium chloride according to claim 8, characterized in that: The interior of the elastic member (21) is hollow in design; a second spring (22) is fixedly connected to the interior of the elastic member (21); and a group of air holes (23) are evenly distributed on the lower side of the elastic member (21).

10. The device for producing online round granular ammonium chloride according to claim 8, characterized in that: The spiral plate (7) is elastic; a paddle (24) is fixedly connected to the lower side of the induction block (20); and a spring (25) is fixedly connected to the upper side of the spiral plate (7) at a position corresponding to the paddle (24).

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