Steam jet gas phase preparation of carbon-based composite fertilizer device

Abstract

The utility model relates to a kind of steam injection gas-phase preparation carbon-based compound fertilizer device, including carbon powder conveying mechanism, multiple chemical fertilizer conveying mechanism and mixing drying mechanism, carbon powder conveying mechanism includes hopper, the pneumatic mixer being communicated with the bottom of hopper and purge pipe, purge pipe penetrates pneumatic mixer;Chemical fertilizer conveying mechanism and carbon powder conveying mechanism structure are same, and the end of purge pipe in multiple chemical fertilizer conveying mechanism is respectively connected with the end of purge pipe in carbon powder conveying mechanism parallelly;Mixing drying mechanism includes cyclone dryer and cyclone separator, cyclone separator is coaxially arranged in cyclone dryer, the end of purge pipe of carbon powder conveying mechanism passes through cyclone dryer, and is communicated with the material inlet of cyclone separator, the material outlet of cyclone separator is downwardly communicated with cyclone dryer, and the gas outlet of cyclone separator is upwardly penetrated cyclone dryer.The utility model is prepared by steam injection preheating humidification, mixed material, utilizes high-temperature nitrogen drying carbon-based fertilizer, realizes carbon-based fertilizer preparation.

Description

Technical Field

[0001] This utility model relates to the field of carbon-based fertilizer preparation technology, and in particular to a steam jet gas phase preparation device for carbon-based compound fertilizer. Background Technology

[0002] Carbon-based compound fertilizer is a fertilizer composed of various components such as carbon-containing organic matter, urea, and diammonium phosphate. It is rich in carbon and possesses highly efficient and comprehensive nutrients. The preparation of carbon-based compound fertilizer requires mixing carbon powder with other types of fertilizer granules (including 45-55% fermented organic fertilizer) to promote the bonding between the carbon powder and the fertilizer. Conventional mixing methods are relatively simple, often using stirring rods or spiral mixers, which may not achieve thorough mixing. This can hinder the slow-release effect of the carbon-based compound fertilizer, resulting in excessively rapid nutrient release during application. Summary of the Invention

[0003] To address the problem of uneven mixing in conventional mixing equipment for preparing carbon-based fertilizers, this invention provides a steam jet gas phase preparation device for carbon-based compound fertilizers. The fertilizer undergoes preliminary and secondary mixing within a pipeline and a cyclone separator, improving the mixing effect and promoting better fixation of carbon powder on the fertilizer surface.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A steam jet gas phase preparation device for carbon-based compound fertilizer includes a carbon powder conveying mechanism, multiple fertilizer conveying mechanisms, and a mixing and drying mechanism. The carbon powder conveying mechanism includes a hopper, a pneumatic mixer connected to the bottom of the hopper, and a purge pipe. The purge pipe passes through the pneumatic mixer, and room temperature nitrogen and high temperature steam flow inside the purge pipe. The material is pneumatically conveyed through the mixture of the two gases. The fertilizer conveying mechanism and the charcoal powder conveying mechanism have the same structure, and the ends of the purge pipes in the multiple fertilizer conveying mechanisms are connected in parallel with the ends of the purge pipes in the charcoal powder conveying mechanism. The mixing and drying mechanism includes a cyclone dryer and a cyclone separator. The cyclone dryer is internally connected to a high-temperature nitrogen pipeline, and the top of the cyclone dryer is also connected to a nitrogen outlet to facilitate the flow of high-temperature nitrogen inside the cyclone dryer. The cyclone separator is coaxially installed inside the cyclone dryer. The end of the purge pipe of the carbon powder conveying mechanism passes through the cyclone dryer and is connected to the material inlet of the cyclone separator. The material outlet of the cyclone separator is downward and connected to the cyclone dryer. The gas outlet of the cyclone separator is upward and exits the cyclone dryer.

[0005] Furthermore, the pneumatic mixer includes a rotary feeder and a three-way pipe connected vertically. The rotary feeder is connected to the hopper at the top to facilitate the delivery of fertilizer from the hopper to the three-way pipe. The three-way pipe is connected to the purge pipe on both the left and right sides. The purge pipe is a "Y" shaped pipe, with a normal temperature nitrogen inlet section and a high temperature steam inlet section at the front end, and the purge pipe is connected to a tee pipe at the rear.

[0006] Furthermore, the hopper in the charcoal powder conveying mechanism is a charcoal powder hopper and the purging pipe is a charcoal powder purging pipe; the hopper in the fertilizer conveying mechanism is a fertilizer hopper and the purging pipe is a fertilizer purging pipe. The ends of the multiple fertilizer purge pipes are connected in parallel with the carbon powder purge pipes, and the carbon powder purge pipes pass through the cyclone dryer and are connected to the material inlet of the cyclone separator.

[0007] Furthermore, multiple adsorption tubes are connected in series on the carbon powder purge pipe, and the adsorption tubes correspond one-to-one with the fertilizer purge pipes. The adsorption tubes have large diameters at both ends and small diameters in the middle, with tapered transitions at the diameter changes. The airflow velocity inside the adsorption tubes increases.

[0008] The adsorption tube is connected to the diffuser tube in the middle. The diffuser tube is arranged around the periphery of the adsorption tube. Multiple elongated material discharge holes are evenly opened on the wall of the adsorption tube. The adsorption tube is connected to the diffuser tube through the material discharge holes to facilitate material dispersion. The diffuser tube is connected to the fertilizer purging pipe.

[0009] Furthermore, the material discharge holes on the multiple adsorption tubes are arranged in a staggered manner.

[0010] Furthermore, there are two high-temperature nitrogen pipelines, which are symmetrically arranged on both sides of the cyclone dryer. Each high-temperature nitrogen pipeline includes a main pipeline and multiple branch pipelines connected in parallel to the main pipeline. The multiple branch pipelines are arranged vertically at intervals along the height direction of the cyclone dryer. The branch pipelines are tangent to the cyclone dryer, and the nitrogen outlet is tangent to the cyclone dryer.

[0011] Furthermore, the bottom of the cyclone dryer is a collection bin, and a discharge valve is provided at the bottom of the collection bin. The material outlet of the cyclone separator is connected downward to the collection bin. The collection bin is equipped with an umbrella-shaped material distribution plate, which corresponds vertically to the material outlet of the hydrocyclone separator. Multiple support rods are provided on the edge of the material distribution plate, and the material distribution plate is connected and fixed to the inner wall of the collection bin through the support rods to facilitate the installation of the material distribution plate. The branch pipe located at the bottom corresponds to the material distribution plate to facilitate the re-drying of carbon-based fertilizer.

[0012] The beneficial effects of this utility model through the above technical solution are: This invention utilizes multiple fertilizer conveying mechanisms to store various fertilizer materials, including organic fertilizer, and to pneumatically convey them. A charcoal powder conveying mechanism is designed for storing and pneumatically conveying charcoal powder. Different types of fertilizers and charcoal powder are initially mixed in a charcoal powder purge pipe, and then sent to a hydrocyclone separator for further mixing in a rotating state. During the mixing process, the charcoal powder is fixed to the fertilizer surface, forming a slow-release layer that slows down the release of fertilizer nutrients.

[0013] In this invention, the gas and some dust of the mixed materials undergo gas-solid separation in a hydrocyclone separator, with nitrogen carrying water vapor out. High-temperature nitrogen gas is introduced into the hydrocyclone dryer through a high-temperature nitrogen pipeline. This high-temperature nitrogen heats the hydrocyclone separator, drying the rotating mixed materials within it. The dried carbon-based fertilizer then falls into a collection silo for temporary storage. The entire principle of carbon-based fertilizer preparation involves preheating and humidifying with steam injection, mixing carbon powder and fertilizer materials, and then drying the carbon-based fertilizer with high-temperature nitrogen gas. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a steam jet gas phase preparation device for carbon-based compound fertilizer according to this utility model.

[0015] Figure 2 This utility model relates to a steam jet gas-phase preparation device for carbon-based compound fertilizer. Figure 1 Schematic diagram of the medium-carbon powder conveying mechanism.

[0016] Figure 3 This is a schematic diagram of a steam jet gas phase preparation device for carbon-based compound fertilizer, according to this utility model, in which the diffusion tube is connected to the adsorption tube through the material discharge hole.

[0017] Figure 4 This is a schematic diagram of the mixing and drying mechanism of a steam jet gas phase preparation device for carbon-based compound fertilizer according to this utility model.

[0018] Figure 5 This is a top view of the high-temperature nitrogen pipeline layout of a steam jet gas phase preparation device for carbon-based compound fertilizer according to this utility model.

[0019] The attached diagram is labeled as follows: 1. Carbon powder conveying mechanism; 2. Fertilizer conveying mechanism; 3. Mixing and drying mechanism; 31. Cyclone dryer; 32. Cyclone separator; 321. Material inlet; 322. Material outlet; 323. Gas outlet; 4. Pneumatic mixer; 41. Rotary feeder; 42. T-junction pipe; 5. Carbon powder hopper; 6. Carbon powder purging pipe; 7. Normal temperature nitrogen inlet section; 8. High temperature steam inlet section; 9. Fertilizer hopper; 10. Fertilizer purging pipe; 11. Adsorption pipe; 12. Diffuser pipe; 13. Material drop hole; 14. High temperature nitrogen pipeline; 141. Main pipeline; 142. Branch pipeline; 15. Nitrogen outlet; 16. Collection bin; 161. Discharge valve; 17. Material equalization plate; 171. Support rod. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings: like Figures 1-5 As shown, a steam jet gas phase preparation device for carbon-based compound fertilizer includes a carbon powder conveying mechanism 1, multiple fertilizer conveying mechanisms 2, and a mixing and drying mechanism 3. The carbon powder conveying mechanism 1 is used for pneumatic conveying of carbon powder. The carbon powder conveying mechanism 1 includes a hopper, a pneumatic mixer 4 connected to the bottom of the hopper, and a purge pipe. The lower end of the hopper is inverted conical to facilitate concentrated feeding. A vibrator is installed at the lower end of the hopper. Here, the hopper in the carbon powder conveying mechanism 1 is defined as a carbon powder hopper 5, and the purge pipe is defined as a carbon powder purge pipe 6.

[0021] The pneumatic mixer 4 includes a rotary feeder 41 and a three-way pipe 42 connected vertically. The rotary feeder 41 is connected to a hopper at the top and to the three-way pipe 42 at the bottom. A purge pipe runs through the pneumatic mixer 4; specifically, the three-way pipe 42 is connected to the purge pipe on both the left and right sides. Room temperature nitrogen and high temperature steam flow inside the purge pipe, and the mixed gas inside the purge pipe is used to purge the material.

[0022] To facilitate gas flow into the purge pipe, the purge pipe is approximately Y-shaped, with a room-temperature nitrogen inlet section 7 and a high-temperature steam inlet section 8 at its front ends. The purge pipe then connects to a tee pipe 42. This allows the room-temperature nitrogen source to be connected to the room-temperature nitrogen inlet section 7, and the high-temperature steam source to be connected to the high-temperature steam inlet section 8, thus enabling the delivery of a mixed gas into the purge pipe. The temperature of the high-temperature steam source is 100℃.

[0023] The fertilizer conveying mechanism 2 is used for pneumatic conveying of fertilizer. There are three fertilizer conveying mechanisms 2, which can convey three types of fertilizer granules, one of which is fermented organic fertilizer, accounting for 45-55%. Each fertilizer conveying mechanism 2 has the same structure and principle as the charcoal powder conveying mechanism 1. The hopper in the fertilizer conveying mechanism 2 is the fertilizer hopper 9, and the blowpipe is the fertilizer blowpipe 10.

[0024] The fertilizer conveying mechanism 2 is ultimately connected to the charcoal powder conveying mechanism 1, meaning that the ends of the purge pipes in the three fertilizer conveying mechanisms 2 are connected in parallel to the ends of the purge pipes in the charcoal powder conveying mechanism 1. Specifically, the ends of the three fertilizer purge pipes 10 are connected in parallel to the charcoal powder purge pipe 6. The three types of fertilizer granules conveyed pneumatically are ultimately concentrated in the charcoal powder purge pipe 6 and mixed with the charcoal powder.

[0025] To improve the uniformity of mixing of charcoal powder and fertilizer granules, three adsorption tubes 11 are connected in series on the charcoal powder purge pipe 6. Each adsorption tube 11 corresponds to a fertilizer purge pipe 10. The adsorption tubes 11 have larger diameters at both ends and smaller diameters in the middle, with tapered tubes used for transitions at the diameter changes. As a result, the flow velocity of the mixed gas increases when it flows through the adsorption tubes 11, which promotes the feeding speed of the fertilizer purge pipe 10, allowing the fertilizer granules to enter the charcoal powder purge pipe 6 quickly.

[0026] Meanwhile, a diffuser 12 is connected to the middle of the adsorption tube 11. The diffuser 12 is circular and surrounds the adsorption tube 11. Three elongated material discharge holes 13 are evenly opened on the wall of the adsorption tube 11. The adsorption tube 11 is connected to the diffuser 12 through the material discharge holes 13, and the diffuser 12 is connected to the fertilizer purging pipe 10. The fertilizer particles in the fertilizer purging pipe 10 first enter the diffuser 12, and then are evenly dispersed and fall into the adsorption tube 11 through the material discharge holes 13, flowing backward along the carbon powder purging pipe 6.

[0027] It should be noted that the discharge holes 13 on the three adsorption tubes 11 are staggered. The dispersing effect of the discharge holes 13 prevents the fertilizer particles from being concentrated and causes them to be dispersed into multiple streams, thus promoting the mixing of fertilizer and charcoal powder.

[0028] After the fertilizer granules and charcoal powder are initially mixed in the charcoal powder purge pipe 6, they enter the mixing and drying mechanism 3 for further mixing. The mixing and drying mechanism 3 includes a cyclone dryer 31 and a cyclone separator 32. The cyclone dryer 31 is connected to a high-temperature nitrogen pipeline 14, and the top of the cyclone dryer 31 is also connected to a nitrogen outlet 15. The bottom of the cyclone dryer 31 is a collection bin 16, and a discharge valve 161 is provided at the bottom of the collection bin 16.

[0029] In this embodiment, there are two high-temperature nitrogen pipelines 14, symmetrically arranged on both sides of the cyclone dryer 31. Each high-temperature nitrogen pipeline 14 includes a main pipeline 141 and at least three branch pipelines 142 connected in parallel to the main pipeline 141. The branch pipelines 142 are arranged vertically at intervals along the height of the cyclone dryer 31 and are tangential to the cyclone dryer 31. The high-temperature nitrogen source is connected to the main pipeline 141 and then distributed to the three branch pipelines 142. The branch pipelines 142 are tangentially connected to the cyclone dryer 31, allowing high-temperature nitrogen to be introduced into the cyclone dryer 31. The high-temperature nitrogen exists in a swirling form within the cyclone dryer 31.

[0030] Three branch pipes 142 are designed to form a three-stage cyclone drying process within the cyclone dryer 31, ensuring thorough drying. More branch pipes 142 can be added as needed, or the height of the cyclone separator 32 can be increased to extend the residence time of the carbon-based fertilizer in the equipment, further promoting thorough drying. The temperature of the high-temperature nitrogen source is 150 degrees Celsius. The high-temperature nitrogen gradually rises and flows out through nitrogen outlet 15, which is tangential to the cyclone dryer 31.

[0031] The hydrocyclone separator 32 is coaxially arranged inside the hydrocyclone dryer 31, meaning the hydrocyclone dryer 31 encloses the hydrocyclone separator 32. The end of the purge pipe of the charcoal powder conveying mechanism 1 passes through the hydrocyclone dryer 31 and connects to the material inlet 321 of the hydrocyclone separator 32. Specifically, the charcoal powder purge pipe 6 passes through the hydrocyclone dryer 31 and connects to the material inlet 321 of the hydrocyclone separator 32. The mixture of fertilizer granules and charcoal powder enters the hydrocyclone separator 32 for further mixing.

[0032] The material outlet 322 of the cyclone separator 32 is connected downwards to the cyclone dryer 31, that is, the material outlet 322 of the cyclone separator 32 is connected downwards to the collection bin 16. The gas outlet 323 of the cyclone separator 32 extends upwards out of the cyclone dryer 31.

[0033] The principle of this invention is as follows: When preparing carbon-based compound fertilizer, the carbon powder conveying mechanism 1, multiple fertilizer conveying mechanisms 2, and mixing and drying mechanism 3 are all activated. The pneumatic mixer 4 conveys the carbon powder into the carbon powder purge pipe 6, and at the same time, the pneumatic mixer 4 conveys the fertilizer granules into the fertilizer purge pipe 10. Through the conveying of a mixture of ambient temperature nitrogen and high temperature steam, the fertilizer granules in the fertilizer purge pipe 10 can be conveyed into the carbon powder purge pipe 6. The flowing carbon powder and the three types of fertilizer granules are initially mixed in the carbon powder purge pipe 6, and then enter the cyclone separator 32. During this process, the carbon powder is fixed on the fertilizer surface and forms a slow-release layer.

[0034] High-temperature nitrogen gas is supplied to the cyclone dryer 31 through the high-temperature nitrogen pipeline 14, which in turn heats the cyclone separator 32. Fins can be installed on the outer side wall of the cyclone separator 32 to increase the heat exchange area. The mixture is remixed and dried as it gradually rotates and moves downward within the cyclone separator 32. Gas and some dust undergo gas-solid separation in the cyclone separator 32. Nitrogen carrying water vapor is discharged through the gas outlet 323, and the dried carbon-based fertilizer falls into the collection silo 16 through the material outlet 322 for temporary storage. A vibrator is also installed on the side wall of the collection silo 16.

[0035] To achieve uniform material distribution, an umbrella-shaped material distribution plate 17 is installed inside the collection silo 16. The material distribution plate 17 corresponds vertically to the material outlet 322 of the hydrocyclone 32, and its diameter is smaller than that of the hydrocyclone dryer 31. During installation, the material distribution plate 17 is equipped with three support rods 171 along its edge, and is connected and fixed to the inner wall of the collection silo 16 via these support rods. The prepared carbon-based fertilizer first falls onto the material distribution plate 17, is dispersed, and then falls into the collection silo 16. The lowest branch pipe 142 corresponds to the material distribution plate 17, allowing high-temperature nitrogen gas to surround the plate 17 for better drying of the carbon-based fertilizer.

[0036] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A steam jet gas-phase preparation device for carbon-based compound fertilizer, characterized in that, It includes a carbon powder conveying mechanism (1), multiple fertilizer conveying mechanisms (2) and a mixing and drying mechanism (3). The carbon powder conveying mechanism (1) includes a hopper, a pneumatic mixer (4) connected to the bottom of the hopper and a purge pipe. The purge pipe passes through the pneumatic mixer (4). The purge pipe is a "Y" shaped pipe. The front end of the purge pipe is a normal temperature nitrogen inlet section (7) and a high temperature steam inlet section (8). The normal temperature nitrogen source is connected to the normal temperature nitrogen inlet section (7), and the high temperature steam source is connected to the high temperature steam inlet section (8) to deliver mixed gas into the purge pipe. The fertilizer conveying mechanism (2) has the same structure as the charcoal powder conveying mechanism (1), and the ends of the purge pipes in the multiple fertilizer conveying mechanisms (2) are connected in parallel with the ends of the purge pipes in the charcoal powder conveying mechanism (1); The mixing and drying mechanism (3) includes a cyclone dryer (31) and a cyclone separator (32). The cyclone dryer (31) is internally connected to a high-temperature nitrogen pipeline (14), and the top of the cyclone dryer (31) is also connected to a nitrogen outlet (15). The cyclone separator (32) is coaxially arranged inside the cyclone dryer (31). The end of the purge pipe of the carbon powder conveying mechanism (1) passes through the cyclone dryer (31) and is connected to the material inlet (321) of the cyclone separator (32). The material outlet (322) of the cyclone separator (32) is connected downward to the cyclone dryer (31), and the gas outlet (323) of the cyclone separator (32) is connected upward to the cyclone dryer (31).

2. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 1, characterized in that, The pneumatic mixer (4) includes a rotary feeder (41) and a three-way pipe (42) that are connected vertically. The rotary feeder (41) is connected to the hopper at the top, and the three-way pipe (42) is connected to the purge pipe on both the left and right sides. The purge pipe connects to the tee pipe (42) at the rear.

3. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 1, characterized in that, The hopper in the charcoal powder conveying mechanism (1) is a charcoal powder hopper (5) and the purging pipe is a charcoal powder purging pipe (6). The hopper in the fertilizer conveying mechanism (2) is a fertilizer hopper (9) and the purging pipe is a fertilizer purging pipe (10). The ends of the multiple fertilizer purge pipes (10) are connected in parallel with the carbon powder purge pipe (6), and the carbon powder purge pipe (6) passes through the cyclone dryer (31) and is connected to the material inlet (321) of the cyclone separator (32).

4. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 3, characterized in that, Multiple adsorption tubes (11) are connected in series on the carbon powder purge pipe (6). The adsorption tubes (11) correspond one-to-one with the fertilizer purge pipe (10). The adsorption tubes (11) have large diameters at both ends and small diameters in the middle. The diameter of the adsorption tubes (11) changes at the point where the diameter changes. The adsorption tube (11) is connected to the diffuser tube (12) in the middle. The diffuser tube (12) is arranged around the adsorption tube (11). Multiple long strip-shaped material discharge holes (13) are evenly opened on the wall of the adsorption tube (11). The adsorption tube (11) is connected to the diffuser tube (12) through the material discharge holes (13). The diffuser tube (12) is connected to the fertilizer purging pipe (10).

5. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 4, characterized in that, The material discharge holes (13) on the multiple adsorption tubes (11) are arranged in a staggered manner.

6. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 1, characterized in that, The high-temperature nitrogen pipeline (14) consists of two lines, which are symmetrically arranged on both sides of the cyclone dryer (31). Each high-temperature nitrogen pipeline (14) includes a main pipeline (141) and multiple branch pipelines (142) connected in parallel to the main pipeline (141). The multiple branch pipelines (142) are arranged vertically at intervals along the height direction of the cyclone dryer (31). The branch pipelines (142) are tangent to the cyclone dryer (31), and the nitrogen outlet (15) is tangent to the cyclone dryer (31).

7. The steam jet gas-phase preparation device for carbon-based compound fertilizer according to claim 6, characterized in that, The bottom of the cyclone dryer (31) is a collection bin (16), and a discharge valve (161) is provided at the bottom of the collection bin (16). The material outlet (322) of the cyclone separator (32) is connected downward to the collection bin (16). The material collection bin (16) is provided with an umbrella-shaped material distribution plate (17). The material distribution plate (17) corresponds vertically to the material outlet (322) of the hydrocyclone separator (32). Multiple support rods (171) are provided on the edge of the material distribution plate (17). The material distribution plate (17) is connected and fixed to the inner wall of the material collection bin (16) through the support rods (171). The lowest branch pipe (142) corresponds to the material distribution plate (17).

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