A device for producing medium element fertilizer by using coal solid waste and nitric acid phosphorus solid waste

Abstract

The utility model belongs to the technical field of solid waste treatment, specifically relates to a device for producing medium element fertilizer by coal solid waste and nitrophosphate solid waste, including superfine grinder, the superfine grinder is connected agitator through the belt, nitrophosphate solid waste is connected agitator through the belt, and the agitator outlet is connected extruder through the belt, and the extruder carries out primary granulation forming to material, and the extruder outlet is connected comprehensive machine, and carries out primary screening through comprehensive machine, and the bottom of comprehensive machine is provided with return belt, and the agitator is connected through return belt of comprehensive machine;The outlet of comprehensive machine is connected granulator through the inclination belt, and the outlet of granulator is connected drying machine through the belt, and drying machine carries out drying through hot air, and the outlet of drying machine is connected screening machine through the belt;Screening machine is equipped with screening machine qualified particle outlet and screening machine unqualified particle outlet;The unqualified particle outlet of screening machine is connected crusher, and the return belt connected from the outlet of crusher is used to send back the agitator after being crushed by the crusher;The qualified particle outlet of screening machine is connected cooling machine through finished product belt, and the outlet of cooling machine is connected coating machine through the belt, and the outlet of coating machine is connected packing machine through the belt, and realizes finished product packing.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid waste treatment, specifically relating to a device for producing medium-element fertilizers using coal solid waste and nitrate phosphorus solid waste. Background Technology

[0002] In the production process of nitric acid phosphate fertilizer, phosphate rock powder is decomposed by nitric acid, and acid-insoluble substances are removed by sedimentation and filtration. The mother liquor is cooled to generate calcium nitrate tetrahydrate crystals. The separated and filtered calcium nitrate tetrahydrate reacts with ammonium carbonate from diammonium solution from the absorption tower to generate ammonium nitrate and calcium carbonate precipitate. Through filtration, calcium carbonate is filtered out as solid waste of nitric acid phosphate.

[0003] This byproduct, calcium carbonate, is produced by the chemical reaction of phosphate rock powder and excess nitric acid. The nitric acid decomposes the trace elements in the phosphate rock, resulting in some of these elements being incorporated into the main product, nitric acid phosphate fertilizer, while the remainder is stored in the calcium carbonate. Calcium carbonate contains a certain amount of trace elements and some ionic nutrients, which can be absorbed by crops.

[0004] Coal solid waste refers to the crystalline solid waste formed by the residue of coal after high-temperature combustion and calcination. It has a glass-like morphology, high strength, and its main component is silicon dioxide. After testing, the effective silicon content is greater than or equal to 18%, which is a relatively high usable content and can be used for agricultural production.

[0005] With the continuous expansion of production, the amount of solid waste generated is also increasing. Effectively utilizing the nutrients contained in two types of solid waste to produce medium-element fertilizers has become an important task in solid waste management and promoting green and environmentally friendly production and operation. This can help avoid the huge investments in solid waste treatment in recent years and serve as a profitable project in the future, promoting green and sustainable development. Summary of the Invention

[0006] To address the current challenge of effectively treating and reusing nitrate phosphorus solid waste and coal solid waste, this invention proposes a method for producing medium-element fertilizers using coal solid waste and nitrate phosphorus solid waste. Compared to traditional medium-element fertilizer production, this method directly utilizes existing solid waste as the main raw material, significantly reducing raw material costs and solid waste treatment costs. The resulting product has high nutrient content, lowering company operating costs and improving efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An apparatus for producing medium-element fertilizers from coal solid waste and nitrate phosphorus solid waste includes an ultrafine mill connected to a mixer via a belt, the nitrate phosphorus solid waste connected to the mixer via a belt, and an extruder connected to the mixer outlet via a belt. The extruder performs primary granulation of the material, and the extruder outlet is connected to a granulator for primary screening. A return belt is installed at the bottom of the granulator, which is connected to the mixer via the return belt. The granulator outlet is connected to a granulator via an inclined belt, and the granulator outlet is connected to a dryer via a belt. The dryer dries the material using hot air, and the dryer outlet is connected to a screening machine via a belt. The screening machine has outlets for qualified and unqualified particles. The unqualified particle outlet is connected to a crusher, and the crushed particles are returned to the mixer via a return belt connected to the crusher outlet. The qualified particle outlet is connected to a cooler via a finished product belt, the cooler outlet is connected to a coating machine via a belt, and the coating machine outlet is connected to a packaging machine via a belt for finished product packaging.

[0008] Furthermore, a screw conveyor is installed at the bottom inlet of the ultrafine mill as the feed inlet for coal solid waste, which is ground to 1000 mesh by the ultrafine mill. A screening machine is installed at the bottom outlet of the ultrafine mill, and finished product belt and return belt are set up. Material that does not reach 1000 mesh re-enters the ultrafine mill via the return belt. The end of the finished product belt is connected to a coal solid waste metering belt to measure the weight of the coal solid waste that has been processed to the qualified fineness.

[0009] Furthermore, a coal solid waste metering belt controller is installed to measure the weight of coal solid waste on the coal solid waste metering belt; a nitrate phosphorus solid waste metering belt controller is installed to measure the weight of nitrate phosphorus solid waste on the nitrate phosphorus solid waste metering belt.

[0010] Furthermore, an synergistic substance addition pipeline is connected to the top of the mixer, and a plunger pump and a storage tank are installed on the synergistic substance pipeline.

[0011] Furthermore, a granulation liquid phase addition pipeline is provided at the inlet of the granulator, and the granulation liquid phase addition pipeline is connected to a storage tank; a centrifugal pump and a flow meter are provided on the granulation liquid phase addition pipeline.

[0012] Furthermore, the hot air for the dryer is generated by blowing ambient air into the heat exchanger by a blower and heating it.

[0013] Furthermore, an exhaust duct is connected to the top of the dryer outlet, and an exhaust fan and a tail gas scrubbing tower are installed at the end of the exhaust duct.

[0014] Furthermore, thermometers are installed at both the inlet and outlet of the dryer.

[0015] Furthermore, the coating machine inlet is equipped with coating agent and coating powder addition pipelines, and the respective coating agent and coating powder pipelines are equipped with plunger pumps and storage tanks, as well as screw conveyors and storage tanks.

[0016] Furthermore, a flow meter is installed on the coating agent pipeline of the coating machine.

[0017] Compared with the prior art, the present invention has the following advantages: 1. This utility model utilizes nitrate phosphate solid waste and coal solid waste generated during the production of nitrate phosphate fertilizer, achieving the goals of local material sourcing, energy conservation, and emission reduction, thus significantly saving raw material costs. Therefore, the production process of medium-element fertilizer has the advantages of low production cost, promoting solid waste treatment, and efficient resource reuse. The produced medium-element fertilizer product is a non-fully water-soluble fertilizer. Furthermore, functional synergistic substances such as alginic acid, polyglutamic acid, amino acids, humic acid, and microbial agents can be added to the fertilizer through the additive feed line according to market demand to enhance its functionality. This achieves innovative and environmentally friendly goals that meet market demands.

[0018] 2. In the production of medium-element fertilizers, this utility model allows for the adjustment of the addition ratio at the metering belt, thereby changing the content of medium-element elements and adjusting the nutrient ratio of the fertilizer according to the crop's nutritional needs, thus improving the diversification of market demand.

[0019] 3. In the production of medium-element fertilizers, this utility model provides a tail gas scrubbing tower at the end of the air outlet of the dryer to solve the problem of dust in the production process. This dust can be collected and reused in the production process.

[0020] 4. In the production of medium-element fertilizers, the main raw material of this invention, phosphorus nitrate solid waste, contains a large amount of medium and trace elements, which promotes agricultural growth and has certain functions of acidification and soil reduction. It can also be used as a soil conditioner. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an apparatus for producing fertilizers containing medium-quantity elements.

[0022] Attached labels: 1 is a coal solid waste metering belt controller, 2 is a phosphorus nitrate solid waste metering belt controller, 3 is a flow meter, 4 is a flow meter, 5 is a thermometer, 6 is a thermometer, and 7 is a flow meter. Detailed Implementation

[0023] To gain a deeper understanding of this utility model, we will provide a comprehensive and detailed description. However, this utility model has multiple implementations and is not limited to the specific examples listed herein. The presentation of these examples is intended to enhance a comprehensive understanding of the disclosure of this utility model.

[0024] Example 1

[0025] A method for producing medium-element fertilizer using coal solid waste and nitrate phosphorus solid waste includes an ultrafine mill. A screw conveyor is installed at the bottom inlet of the ultrafine mill as the feed inlet for the coal solid waste, which is ground to 1000 mesh. A screening machine is installed at the bottom outlet of the ultrafine mill. A finished product belt and a return belt are also included. Coal solid waste that does not reach 1000 mesh is returned to the ultrafine mill via the return belt. A metering belt is connected to the end of the finished product belt to measure the weight of the processed coal solid waste. Another metering belt controls the metering of the nitrate phosphorus solid waste. After being metered by the two belts, the material enters a mixer. An synergistic substance addition pipeline is connected to the top of the mixer, and a plunger pump and storage tank are installed in the synergistic substance pipeline. The mixer outlet is connected to an extruder via a belt. The extruder performs initial granulation of the material. The extruder outlet is connected to a granulator for initial screening. A return belt is installed at the bottom of the granulator, and the return belt is connected to the mixer. The granulator outlet is connected to the granulator via an inclined belt. The granulator inlet is equipped with a granulation liquid phase addition pipeline, which includes a centrifugal pump and a storage tank. The granulator outlet is connected to a dryer via a belt. The dryer uses hot air for drying, generated by a blower drawing ambient air into a heat exchanger. An exhaust duct is connected to the top of the outlet, with an exhaust fan and a tail gas scrubbing tower at its end. The dryer outlet is connected to a screening machine via a belt. Unqualified particles from the screening machine are connected to a crusher, and the crusher outlet is connected to a belt returning the particles to the agitator. Qualified particles from the screening machine are connected to a cooler via a finished product belt. The cooler outlet is connected to a coating machine via a belt. The coating machine inlet is equipped with coating agent and coating powder addition pipelines, each with a plunger pump and storage tank, and a screw conveyor and storage tank. The coating machine outlet is connected to a packaging machine via a belt for finished product packaging.

[0026] As a further supplement to the above technical solution, a flow meter is provided on the liquid phase addition pipeline of the granulator.

[0027] As a further explanation of the above technical solution, thermometers are installed at the inlet and outlet of the dryer.

[0028] As a further explanation of the above technical solution, a controller is installed on the metering belt.

[0029] As a further supplement to the above technical solution, a flow meter is installed on the coating agent pipeline of the coating machine.

[0030] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of this utility model have been described above to facilitate understanding by those skilled in the art, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, various modifications are obvious as long as they fall within the spirit and scope of this utility model as defined and determined by the appended claims, and all inventions utilizing the concept of this utility model are protected.

Claims

1. An apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste, characterized in that: The system includes an ultrafine grinding mill, which is connected to a mixer via a belt. Nitrate phosphorus solid waste is also connected to the mixer via a belt. The mixer outlet is connected to an extruder via a belt. The extruder performs initial granulation of the material. The extruder outlet is connected to a granulator for initial screening. A return belt is installed at the bottom of the granulator, which is connected to the mixer via the return belt. The granulator outlet is connected to a granulator via an inclined belt. The granulator outlet is connected to a dryer via a belt. The dryer dries the material using hot air. The dryer outlet is connected to a screening machine via a belt. The screening machine has outlets for qualified and unqualified particles. The unqualified particle outlet is connected to a crusher, where the crushed particles are returned to the mixer via a return belt connected to the crusher outlet. The qualified particle outlet is connected to a cooler via a finished product belt. The cooler outlet is connected to a coating machine via a belt. The coating machine outlet is connected to a packaging machine via a belt for finished product packaging.

2. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: A screw conveyor is installed at the bottom inlet of the ultrafine mill as the feed inlet for coal solid waste. The coal solid waste is ground to 1000 mesh by the ultrafine mill. A screening machine is installed at the bottom outlet of the ultrafine mill, and finished product belt and return belt are set up. Material that does not reach 1000 mesh re-enters the ultrafine mill via the return belt. The end of the finished product belt is connected to a coal solid waste metering belt to measure the weight of the coal solid waste that has been processed to the qualified fineness.

3. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 2, characterized in that: A coal solid waste metering belt controller is set up to measure the weight of coal solid waste on the coal solid waste metering belt; a phosphorus nitrate solid waste metering belt controller is set up to measure the weight of phosphorus nitrate solid waste on the phosphorus nitrate solid waste metering belt.

4. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: An synergistic substance addition pipeline is connected to the top of the mixer, and a plunger pump and a storage tank are installed on the synergistic substance pipeline.

5. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: The granulator inlet is equipped with a granulation liquid phase addition pipeline, which is connected to a storage tank; a centrifugal pump and a flow meter are installed on the granulation liquid phase addition pipeline.

6. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: The hot air in the dryer is generated by blowing ambient air into the heat exchanger by a blower and heating it.

7. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: An exhaust duct is connected to the top of the dryer outlet, and an exhaust fan and a tail gas scrubbing tower are installed at the end of the exhaust duct.

8. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: Thermometers are installed at both the inlet and outlet of the dryer.

9. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 1, characterized in that: The coating machine inlet is equipped with coating agent and coating powder addition pipelines, and the coating agent and coating powder pipelines are respectively equipped with plunger pumps and storage tanks, as well as screw conveyors and storage tanks.

10. The apparatus for producing micronutrient fertilizers from coal solid waste and nitrate phosphorus solid waste according to claim 9, characterized in that: A flow meter is installed on the coating agent pipeline of the coating machine.

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