Production device for improving quality of granular ammonium sulfate

Abstract

The utility model discloses a production device for improving the quality of granular ammonium sulfate, which comprises an air blower, the air blower is communicated with a hot blast stove through a pipeline, the hot blast stove is communicated with a feed port of a fluidized bed through a pipeline, and a solid discharge port of the fluidized bed is communicated with a feed port at the top of a mixing tank. A discharging opening in the bottom of the mixing tank is sequentially communicated with the double-roller type granulator and the particle shaping machine through pipelines, a discharging opening of the particle shaping machine is communicated with the belt conveyor through a pipeline, a discharging opening in the lower portion of a screen of the particle shaping machine is communicated with the mixing tank through a pipeline, and the mixing tank is provided with a binder feeding pipe. According to the utility model, organic impurities in ammonium sulfate are removed, and double-roller granulation is adopted, so that the granular ammonium sulfate is granulated, the moisture and the strength meet the requirements, and the device can stably run for a long period.

Description

Technical Field

[0001] This utility model relates to the field of agricultural granular ammonium sulfate production, specifically to a production device for improving the quality of granular ammonium sulfate. Background Technology

[0002] The caprolactam plant generates a large amount of unused ammonium sulfate byproduct, leading to a devaluation of ammonia resources. Furthermore, with the continuous rise in sulfur prices and the surge in sulfuric acid prices, the inability to utilize the byproduct ammonium sulfate at a high value results in significant economic losses. The high caprolactam content, unreasonable particle size distribution, and high moisture content in caprolactam-produced ammonium sulfate lead to low strength in the granular ammonium sulfate, affecting product quality. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a production device for improving the quality of granular ammonium sulfate. It adopts a double-roller extrusion granulation method, and after high-temperature dehydration to remove organic impurities, it is extruded and granulated together with binders to obtain high-strength granular ammonium sulfate products. This is of great significance for improving the quality and efficiency of ammonium sulfate by-products in the caprolactam production industry.

[0004] The technical solution of this utility model:

[0005] A production apparatus for improving the quality of granulated ammonium sulfate includes a blower connected to a hot air furnace via a pipeline, the hot air furnace connected to a fluidized bed inlet via a pipeline, an ammonium sulfate feed pipe in the fluidized bed, a solid discharge port in the fluidized bed connected to a top feed port in a mixing tank, a bottom discharge port in the mixing tank connected to a double-roll granulator and a granule shaper via pipelines, a discharge port in the granule shaper connected to packaging equipment via a belt conveyor, and a binder feeding pipe in the mixing tank.

[0006] Preferably, the waste discharge outlet at the top of the fluidized bed is connected in sequence to the primary tailings scrubber, the secondary tailings scrubber, and the tertiary tailings scrubber via pipelines, and the tertiary tailings scrubber is equipped with a primary water inlet pipeline.

[0007] Preferably, the lower part of the secondary tailings washing tower is connected to the top of the primary tailings washing tower via a pipe, the lower part of the tertiary tailings washing tower is connected to the top of the secondary tailings washing tower via a pipe, and the top of the tertiary tailings washing tower is provided with an exhaust port.

[0008] Preferably, the bottom of the primary tailwash tower is also provided with a sewage discharge pipe.

[0009] Preferably, a screen is provided at the bottom of the inside of the particle shaping machine, and the discharge port of the screen is connected to the feed port of the mixing tank through a pipe.

[0010] Preferably, the blower is equipped with a vibration detector, and the blower's air volume is 50,000 Nm³. 3It is made of 20# steel. The DCS remote control is mainly used to provide air for the combustion of the hot blast stove.

[0011] Preferably, the hot blast stove is a dual-fuel combustion furnace capable of simultaneously burning natural gas and water gas, equipped with online temperature and pressure detectors and DCS remote transmission, primarily providing 350°C hot air to the fluidized bed for drying ammonium sulfate. The hot blast stove is made of 316L stainless steel; the fluidized bed is a hot air-heated vibrating fluidized bed.

[0012] Preferably, the double-roller granulator is a double-roller extrusion granulator, an extrusion granulation granulator, and is made of 316L stainless steel; the rollers of the double-roller granulator have fine circular holes with a diameter of 3-6mm to facilitate the extrusion production of granulated ammonium sulfate; the rollers are made of 316L stainless steel and are equipped with steam inlet pipes and steam outlet pipes, which are heated by steam to maintain the temperature above 130℃, and the granulated ammonium sulfate is dried simultaneously during extrusion granulation; the mixing tank is equipped with a double-layer stirring paddle tank and a material level detector, and is made of 316L stainless steel.

[0013] Preferably, the primary tailings scrubbing tower, the secondary tailings scrubbing tower, and the tertiary tailings scrubbing tower are environmentally friendly packed towers for tail dust washing. The primary tailings scrubbing tower, the secondary tailings scrubbing tower, and the tertiary tailings scrubbing tower are equipped with sulfate ion detectors, and all are made of FRPP reinforced polypropylene.

[0014] This utility model has the following beneficial effects:

[0015] 1. By adopting a continuous process reaction device and granulation device, the production of granular ammonium sulfate has been achieved to meet the standards and continuous production, and the high-strength granular ammonium sulfate obtained has good economic benefits.

[0016] 2. All equipment in the unit is made of special corrosion-resistant materials, which can withstand the corrosion of materials to the greatest extent and achieve long-term stable operation of the unit.

[0017] 3. This invention enables the high-value utilization of ammonium sulfate, a byproduct of the caprolactam industry, resulting in significant economic benefits. The removal of organic impurities from the ammonium sulfate and the use of a double-roller granulation process achieve the granulation of granular ammonium sulfate, ensuring that moisture content and strength meet requirements, and allowing the equipment to operate stably for extended periods. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the roller structure;

[0020] In the diagram: 1. Blower; 2. Hot air furnace; 3. Fluidized bed; 4. Mixing tank; 5. Double roller granulator; 6. Granule shaping machine; 7. Belt conveyor; 8. Binder feed pipe; 9. Primary tailings washing tower; 10. Secondary tailings washing tower; 11. Tertiary tailings washing tower; 12. Primary water inlet pipe; 13. Ammonium sulfate feed pipe; 14. Sewage discharge pipe; 15. Screen; 16. Steam inlet pipe; 17. Steam outlet pipe. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1

[0023] A production apparatus for improving the quality of granulated ammonium sulfate includes a blower 1, which is connected to a hot air furnace 2 via a pipeline. The hot air furnace 2 is connected to the feed inlet of a fluidized bed 3 via a pipeline. The solid discharge outlet of the fluidized bed 3 is connected to the top feed inlet of a mixing tank 4. The bottom discharge outlet of the mixing tank 4 is connected to a double-roller granulator 5 and a granule shaper 6 in sequence via a pipeline. The discharge outlet of the granule shaper 6 is connected to a belt conveyor 7 via a pipeline. The discharge outlet at the bottom of the screen of the granule shaper 6 is connected to the mixing tank 4 via a pipeline. The mixing tank is equipped with a binder feeding pipe 8.

[0024] Preferably, the waste discharge outlet at the top of the fluidized bed 3 is connected in sequence to the primary tailings scrubbing tower 9, the secondary tailings scrubbing tower 10 and the tertiary tailings scrubbing tower 11 via pipelines, and the tertiary tailings scrubbing tower 11 is provided with a primary water inlet pipeline 12.

[0025] Preferably, the lower part of the secondary tailings scrubbing tower 10 is connected to the top of the primary tailings scrubbing tower 9 via a pipe, and the lower part of the tertiary tailings scrubbing tower 11 is connected to the top of the secondary tailings scrubbing tower 10 via a pipe. The top of the tertiary tailings scrubbing tower 11 is provided with an exhaust port.

[0026] Preferably, the fluidized bed 3 is provided with an ammonium sulfate feed pipe 13.

[0027] Preferably, the blower 1 is equipped with an online vibration detector and remotely transmitted via DCS. Its main function is to provide air for combustion in the hot blast stove, and the blower's airflow is 50,000 Nm³. 3 The material is 20# steel;

[0028] Preferably, a screen 15 is provided at the bottom inside the particle shaping machine 6, and the discharge port of the screen 15 is connected to the inlet of the mixing tank 4 through a pipe.

[0029] The hot blast furnace 2 is a dual-fuel combustion furnace that can simultaneously burn natural gas and water gas. It is equipped with online temperature and pressure detectors and remote data transmission via DCS. Its main function is to provide 350°C hot air to the fluidized bed for drying ammonium sulfate. The hot blast furnace is made of 316L stainless steel.

[0030] Preferably, the fluidized bed 3 is a hot air heated vibrating fluidized bed, which is mainly used to dry and remove impurities from ammonium sulfate to obtain ammonium sulfate with a water content of about 0.3%. At the same time, the hot air carries away the organic matter in the ammonium sulfate, reducing it to below 20 ppm.

[0031] Preferably, the primary tailings scrubbing tower 9, the secondary tailings scrubbing tower 10, and the tertiary tailings scrubbing tower 11 are environmentally friendly packed towers for tail dust washing. They mainly wash the ammonium sulfate dust in the tail gas through countercurrent spray washing. The scrubbing towers are equipped with online sulfate ion detectors and DCS remote transmission. The primary tailings scrubbing tower, the secondary tailings scrubbing tower, and the tertiary tailings scrubbing tower are all made of FRPP reinforced polypropylene.

[0032] The mixing tank 4 is equipped with a double-layer stirring paddle, an online material level detector, and DCS remote transmission. It is mainly used to mix the dried ammonium sulfate granules from the previous stage with a binder added in a certain proportion. The mixing tank is made of 316L stainless steel.

[0033] Preferably, the double-roller granulator 5 is a double-roller extrusion granulator, i.e., an extrusion molding granulator, and is made of 316L stainless steel. The rollers of the double-roller granulator 5 have fine circular holes with a diameter of 3.5mm to facilitate the extrusion production of granulated ammonium sulfate. The rollers are made of 316L stainless steel and are equipped with a steam inlet pipe 16 and a steam outlet pipe 17. The temperature is maintained above 130℃ by steam heating, and the granulated ammonium sulfate is dried during extrusion granulation. The mixing tank 4 is equipped with a double-layer stirring paddle and a material level detector, and is made of 316L stainless steel.

[0034] The granulator 6 is a granulator screener that includes a screen and a return system. It primarily screens the granulated ammonium sulfate, packaging qualified products to obtain granulated ammonium sulfate with a moisture content of approximately 0.3%, while unqualified fine materials are returned to the mixing tank for re-granulation. The core of the entire device lies in the removal of organic impurities from the ammonium sulfate and the double-roller granulation process, achieving granulation of ammonium sulfate with required moisture and strength, and enabling the device to operate stably for extended periods.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A production apparatus for improving the quality of granular ammonium sulfate, comprising a blower (1), characterized in that, The blower (1) is connected to the hot air furnace (2) through a pipe. The hot air furnace (2) is connected to the air inlet of the fluidized bed (3) through a pipe. The fluidized bed (3) is provided with an ammonium sulfate feed pipe (13). The solid discharge port of the fluidized bed (3) is connected to the top feed port of the mixing tank (4). The bottom discharge port of the mixing tank (4) is connected to the double roller granulator (5) and the granule shaping machine (6) in sequence through a pipe. The discharge port of the granule shaping machine (6) is connected to the packaging equipment through a belt conveyor (7). The mixing tank is provided with an adhesive feeding pipe (8).

2. The production apparatus for improving the quality of granular ammonium sulfate according to claim 1, characterized in that, The waste outlet at the top of the fluidized bed (3) is connected in sequence to the primary tailings scrubbing tower (9), the secondary tailings scrubbing tower (10) and the tertiary tailings scrubbing tower (11) through a pipeline. The tertiary tailings scrubbing tower (11) is equipped with a primary water inlet pipeline (12).

3. The production apparatus for improving the quality of granular ammonium sulfate according to claim 2, characterized in that, The lower part of the secondary tailings washing tower (10) is connected to the top of the primary tailings washing tower (9) through a pipe, and the lower part of the tertiary tailings washing tower (11) is connected to the top of the secondary tailings washing tower (10) through a pipe. The top of the tertiary tailings washing tower (11) is provided with an exhaust port.

4. The production apparatus for improving the quality of granular ammonium sulfate according to claim 2, characterized in that, The bottom of the primary tailwash tower (9) is also equipped with a sewage discharge pipe (14).

5. The production apparatus for improving the quality of granular ammonium sulfate according to claim 4, characterized in that, The particle shaping machine (6) has a screen (15) at the bottom inside, and the discharge port of the screen (15) is connected to the inlet of the mixing tank (4) through a pipe.

6. The production apparatus for improving the quality of granular ammonium sulfate according to claim 1, characterized in that, The blower (1) is equipped with a vibration detector.

7. The production apparatus for improving the quality of granular ammonium sulfate according to claim 1, characterized in that, The hot air furnace (2) is a dual-fuel combustion furnace equipped with temperature and pressure detectors; the fluidized bed (3) is a hot air heated vibrating fluidized bed.

8. The production apparatus for improving the quality of granular ammonium sulfate according to claim 1, characterized in that, The double-roll granulator (5) is a double-roll extrusion granulator; the rollers of the double-roll granulator (5) have circular holes with a diameter of 3-6 mm.

9. The production apparatus for improving the quality of granular ammonium sulfate according to claim 8, characterized in that, The roller is made of 316L stainless steel and is equipped with a steam inlet pipe (16) and a steam outlet pipe (17). The mixing tank (4) is equipped with a double-layer stirring paddle and a material level detector.

10. The production apparatus for improving the quality of granular ammonium sulfate according to claim 2, characterized in that, The primary tailings scrubbing tower (9), the secondary tailings scrubbing tower (10), and the tertiary tailings scrubbing tower (11) are environmentally friendly packed towers for tail dust washing. The primary tailings scrubbing tower (9), the secondary tailings scrubbing tower (10), and the tertiary tailings scrubbing tower (11) are equipped with sulfate ion detectors.

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