Dedusting, purifying and recycling device for compound fertilizer production

Abstract

The invention relates to the technical field of dust filtration and recovery, and provides a dust removal, purification and recovery device for compound fertilizer production, the dust removal, purification and recovery device comprises a conical top, dew formation discharge mechanisms and a heating component, the conical top protrudes upwards, a plurality of dew formation discharge mechanisms are fixedly arranged on the conical top, and an air inlet pipe is communicated with the side of a filter cavity; the filter cartridge is obliquely arranged in the filter cavity, gas in the filter cavity enters the gas purification cavity after passing through the filter cartridge, gas in the gas inlet pipe transversely flows in the filter cavity, the dewing discharging mechanism is arranged above the filter cartridge, and the heating components are fixedly connected to the bottom of the filter cavity and can heat the gas in the filter cavity. And the condensation discharging mechanism can condense water vapor collected in the conical top and guide water to flow out of the filtering cavity, so that the technical problem that in the prior art, when gas is heated by using a dry method for recycling, the water vapor may be left in the dust remover to cause caking is solved.

Description

Technical Field

[0001] This invention relates to the field of dust filtration and recovery technology, specifically to a dust removal, purification, and recovery device for compound fertilizer production. Background Technology

[0002] The production process of fertilizer generates a large amount of dust, including raw materials or fertilizer products. The main components are nutrients such as nitrogen, phosphorus, and potassium, which have high recycling value. After collecting the dust, it will be recycled to improve resource utilization and reduce costs. Depending on the nature of the fertilizer components, recycling can be carried out through dry recycling, wet recycling, or a combination of methods.

[0003] Dry dust collection typically involves using air filtration equipment such as bag filters or cartridge filters to collect and recover dust. During filtration, moisture in the air may accumulate on the filter bags, causing dust agglomeration and affecting filtration efficiency. Current technologies often heat the gas before it enters the dust collector to reduce condensation on the filter bags, thus reducing the probability of agglomeration. However, when temperature control is inaccurate or there are large temperature fluctuations, water vapor is very likely to remain inside the dust collector and condense on the filter bags, causing a large amount of agglomeration and significantly impacting the dust filtration effect. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a dust removal, purification and recycling device for compound fertilizer production, which solves the technical problem that water vapor may remain inside the dust collector and cause agglomeration when heating gas using dry recycling in the prior art.

[0005] A dust removal, purification, and recovery device for compound fertilizer production includes a dust collector housing and multiple filter cartridges. The filter cartridges are detachably connected to the dust collector housing. The dust collector housing contains a filtration chamber and a clean air chamber. An inlet pipe and an outlet are connected to the filtration chamber, and an exhaust pipe and a pulse pipe are connected to the clean air chamber. The pulse pipe is connected to the filter cartridges. The device also includes a conical top, a condensation discharge mechanism, and a heating component. The conical top is located at the top of the filtration chamber and protrudes upwards. Multiple condensation discharge points are fixedly mounted on the conical top. The mechanism includes an air inlet pipe connected to the side of the filter chamber, an inclined filter cartridge positioned within the filter chamber, and gas passing through the filter cartridge into the clean air chamber. Gas from the air inlet pipe flows laterally within the filter chamber. A condensation discharge mechanism is positioned above the filter cartridge. Multiple heating components are fixedly connected to the bottom of the filter chamber, enabling the heating of the gas within the filter chamber. The condensation discharge mechanism condenses water vapor collected at the conical top and guides the water out of the filter chamber.

[0006] The conical top is inclined, and the condensation discharge mechanism is also inclined. A drain outlet is provided at a lower position on the filter chamber, and the drain outlet is aligned with the condensation discharge mechanism. The condensation discharge mechanism is inclined as a whole, which allows hot air to collect upwards and condensate and cold air to collect downwards.

[0007] The condensation discharge mechanism includes condenser bars, a heat exchanger, a condensation mesh, a receiving plate, and a gas diversion assembly. Multiple condenser bars are fixedly connected to the conical top, with both ends of the condenser bars facing the higher and lower sides of the conical top, respectively. The heat exchanger is fixedly installed on the conical top, located outside the filter chamber, with both ends of the heat exchanger connected to the two ends of the condenser bars. The condensation mesh is fixedly connected below the condenser bars. The receiving plate is fixedly connected inside the filter chamber, located below the lower end of the condensation mesh. The drain outlet is aligned with the receiving plate. The gas diversion assembly is fixedly connected inside the filter chamber, located below the receiving plate, and is used to guide the flow of water vapor.

[0008] The condenser strip cools the water vapor through the heat exchanger, maintaining a low temperature for condensation. The condensed water droplets collect at the bottom of the condenser strip. The condensation screen catches the water droplets that do not fall onto the receiving plate, preventing them from falling back into the filter chamber. After falling onto the condensation screen, the water droplets collect along the screen at the receiving plate and are discharged through the drain outlet.

[0009] Water vapor moves upward in the filter chamber, contacts the condenser bar, and condenses into water droplets. These droplets fall onto the condensation net, and then flow to the lower end before dripping onto the receiving plate. The gas flow assembly includes multiple guide plates, which are staggered and spaced apart. Gaps exist between the higher and lower ends of the conical apex and adjacent guide plates.

[0010] High-temperature water vapor in the filter chamber can move upward to the cone top. After the water vapor comes into contact with the guide plate, it flows along the guide plate to the higher end of the cone top. After the water vapor comes into contact with the condenser strip and cools down, the low-temperature gas flows along the guide plate to the receiving plate.

[0011] Multiple filter cartridges are arranged in groups, with gaps between adjacent groups. A conical apex is positioned between two groups of filter cartridges, and each group has an outlet at its bottom. A heating element is positioned between two adjacent outlets. The heating element, located below the conical apex, maintains a high temperature between the two groups of filter cartridges. Water vapor remains gaseous in this high-temperature environment, and the rising heat causes the free water vapor in the filtration chamber to gather at the conical apex for condensation.

[0012] Multiple flow equalization plates are fixedly connected to the top of the filter chamber, and the flow equalization plates are arranged on both sides of the conical top, perpendicular to the filter cylinder. Water vapor that does not pass through the filter bag and leaves the filter chamber can move towards the conical top. The flow equalization plates make the water vapor move relatively stably at the top of the filter chamber, gradually flowing towards the conical top, thus achieving better condensation and collection.

[0013] A heating ring is installed at the connection point between the air inlet pipe and the dust collector housing to heat the gas entering the filter chamber. The heating ring initially heats the gas entering the filter chamber, while the heating element maintains the temperature inside the filter chamber to prevent temperature fluctuations from causing water vapor to condense on the dust collector housing or condense on the filter bag surface, leading to dust agglomeration.

[0014] The beneficial effects of this invention are as follows: In this invention, by setting multiple sets of filter cartridges in the filter chamber, the gaps between adjacent sets can reduce the gas flow velocity at the gaps, reducing the impact of airflow near the filter cartridges on water vapor. By setting multiple conical tops at the top of the filter chamber, water vapor can accumulate in the conical tops as it converges towards the top. The condensation discharge mechanism can condense and discharge the water vapor. The inclined arrangement facilitates the flow of hot air and the collection of condensate. By changing the direction of gas entry in the filter chamber, this application can make more water vapor converge upwards. At the same time, by setting conical tops and condensation discharge mechanisms, it facilitates the condensation and collection of water vapor, reducing the chance of water vapor coming into contact with dust on the filter bag, thereby reducing the possibility of agglomeration on the filter bag. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0016] Figure 1This is a schematic diagram of the overall structure of a dust removal, purification and recycling device for compound fertilizer production according to one embodiment of the present invention; Figure 2 This is a structural schematic diagram of the invention from another perspective; Figure 3 This is a cross-sectional internal structural diagram showing the combination of the filter chamber and the air purification chamber in this invention. Figure 4 This is a partial cross-sectional internal structural diagram of the combination of the flow equalization plate and the conical top in this invention; Figure 5 This is a partial cross-sectional internal structural diagram of the flow equalization plate and condensation discharge mechanism in this invention. Figure 6 This is a cross-sectional internal structural diagram of the condensation discharge mechanism in this invention; Figure 7 This is a partial cross-sectional view of the internal structure of the conical top and heating component in this invention.

[0017] In the diagram: 1. Dust collector shell; 2. Filter cartridge; 3. Filter chamber; 4. Clean air chamber; 5. Inlet pipe; 6. Outlet; 7. Exhaust pipe; 8. Pulse pipe; 9. Conical top; 10. Heating component; 11. Drain outlet; 12. Condensing bar; 13. Heat exchanger; 14. Condensation screen; 15. Receiving plate; 16. Guide plate; 17. Flow equalization plate; 18. Heating ring. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-7 The diagram illustrates a dust removal, purification, and recovery device for compound fertilizer production according to an embodiment of the present invention. It includes a dust collector housing 1 and multiple filter cartridges 2 detachably connected to the dust collector housing 1. The dust collector housing 1 contains a filter chamber 3 and a clean air chamber 4. An inlet pipe 5 and an outlet 6 are connected to the filter chamber 3. An exhaust pipe 7 and a pulse pipe 8 are connected to the clean air chamber 4. The pulse pipe 8 is connected to the filter cartridges 2. The device also includes a conical top 9, a condensation discharge mechanism, and a heating element 10. The conical top 9 is located at the top of the filter chamber 3 and protrudes upwards. Multiple condensation discharge mechanisms are fixedly mounted on the conical top 9. The inlet pipe 5 is connected to the side of the filter chamber 3. The filter cartridges 2 are inclined within the filter chamber 3. Gas in the filter chamber 3 passes through... After the filter cartridge 2 enters the clean air chamber 4, the gas in the inlet pipe 5 flows laterally in the filter chamber 3. The condensation discharge mechanism is set above the filter cartridge 2. Multiple heating components 10 are fixedly connected to the bottom of the filter chamber 3, which can heat the gas in the filter chamber 3. The condensation discharge mechanism can condense the water vapor collected in the conical top 9 and guide the water out of the filter chamber 3. In this application, by improving the top of the filter cartridge 2 dust collector, the inlet pipe 5 is connected to the side of the dust collector shell 1, so that the gas at the top of the filter chamber 3 is relatively stable when the gas is filtered. The water vapor can move upward to the conical top 9 under high temperature environment and be discharged through the condensation discharge mechanism, reducing the possibility of water vapor remaining in the filter chamber 3 and causing dust agglomeration.

[0025] like Figures 1-6As shown, the conical top 9 is inclined, and the condensation discharge mechanism is also inclined. A drain outlet 11 is provided at a lower position on the filter chamber 3. The drain outlet 11 is aligned with the condensation discharge mechanism. The condensation discharge mechanism is inclined as a whole, which allows hot air to gather upwards and condensate and cold air to gather downwards. The hot air rises naturally and falls naturally after condensation. It is separated by the guide plate 16 to prevent the hot and cold air from contacting each other too early, which would cause the water vapor to cool down and make it difficult to continue to move upwards.

[0026] like Figures 3-6 As shown, the condensation discharge mechanism includes condenser bars 12, heat exchanger 13, condensation mesh 14, receiving plate 15, and gas diversion assembly. Multiple condenser bars 12 are fixedly connected to the conical top 9, with both ends of the condenser bars 12 facing the higher and lower sides of the conical top 9, respectively. The heat exchanger 13 is fixedly installed on the conical top 9 and located outside the filter chamber 3. Both ends of the heat exchanger 13 are connected to both ends of the condenser bars 12. The condensation mesh 14 is fixedly connected below the condenser bars 12, and the receiving plate 15 is fixedly connected inside the filter chamber 3. The receiving plate 15 is located below the lower end of the condensation net 14. The drain outlet 11 is aligned with the receiving plate 15. The gas diversion assembly is fixedly connected in the filter chamber 3 and located below the receiving plate 15. The gas diversion assembly is used to guide the flow of water vapor. The upper end of the condensation strip 12 abuts against the edge of the conical top 9 to avoid contact with water vapor. There is a gap between the end of the condensation strip 12 near the receiving plate 15 and the conical top 9, so that condensed water droplets can drip onto the receiving plate 15 at the edge of the condensation strip 12.

[0027] like Figures 4-6 As shown, the condenser bar 12 is cooled by the heat exchanger 13 to maintain a low temperature for condensing water vapor. The water droplets formed after condensation collect at the bottom of the condenser bar 12. The condensation net 14 collects the water droplets that do not fall onto the receiving plate 15, preventing the water droplets from falling back into the filter chamber 3. After the water droplets fall onto the condensation net 14, they will collect along the condensation net 14 at the receiving plate 15 and be discharged through the drain outlet 11. A one-way valve can be installed at the drain outlet 11 to allow only water to pass through without exchanging gas, or a water storage tank can be installed to prevent gas from flowing through the drain outlet 11.

[0028] like Figures 5-6As shown, water vapor moves upward in the filter chamber 3, contacts the condenser bar 12, and condenses into water droplets. The water droplets on the condenser bar 12 can drip onto the condensation net 14. The water droplets on the condensation net 14 can flow to the lower end and drip onto the receiving plate 15. The gas flow assembly includes multiple guide plates 16, which are staggered and have gaps between them. There are gaps between the higher and lower ends of the conical top 9 and the adjacent guide plates 16. High-temperature water vapor in the filter chamber 3 can move upward into the conical top 9. After contacting the guide plates 16, the water vapor flows along the guide plates 16 towards the higher end of the conical top 9. After cooling down upon contact with the condenser strip 12, the low-temperature gas flows along the guide plate 16 to the receiving plate 15. The guide plates 16 overlap each other in a stepped manner. Water vapor flows below the multiple guide plates 16 and comes into contact with the condenser strip 12 through the gap between the guide plate 16 and the cone top 9 near the upper end of the cone top 9. The water vapor condenses into water droplets, the gas temperature decreases, and it flows downward above the guide plates 16, and flows downward out of the cone top 9 near the receiving plate 15. The multiple guide plates 16 are not set as a single piece; the multiple gaps between them can enhance the gas flow. When there is a lot of water vapor and the pressure is high, it can also move upward through the gaps between the guide plates 16 and come into contact with the condenser strip 12.

[0029] like Figure 1 and Figure 7 As shown, multiple filter cartridges 2 are arranged in groups, with gaps between adjacent groups of filter cartridges 2. A conical top 9 is positioned between two groups of filter cartridges 2. Each group of filter cartridges 2 has an outlet 6 below it. A heating element 10 is positioned between two adjacent outlets 6 and below the conical top 9. The heating effect of the heating element 10 maintains a high temperature between the two groups of filter cartridges 2. Water vapor remains gaseous in the high-temperature environment, and the high-temperature gas moves upward, allowing the free water vapor in the filter chamber 3 to gather in the conical top 9 for easy condensation. The heating element 10 is positioned below the conical top 9, and the heating maintains a high temperature in the vertical space. This helps to keep the water vapor in a gaseous state and allows the water vapor to flow upward. The heating element 10 positioned between the outlets 6 also avoids affecting the dust discharge.

[0030] like Figures 4-7As shown, multiple flow equalization plates 17 are fixedly connected to the top of the filter chamber 3. The flow equalization plates 17 are arranged on both sides of the conical top 9 and are perpendicular to the filter cartridge 2. Water vapor that has not passed through the filter bag and left the filter chamber 3 can move towards the conical top 9. The flow equalization plates 17 make the water vapor move relatively stably at the top of the filter chamber 3 and gradually flow towards the conical top 9 for better condensation and collection. When the water vapor moves upward and contacts the top of the filter chamber 3, it can continue to flow towards the conical top 9 through the flow equalization plates 17. Since the gas flows around the filter cartridge 2 in the filter chamber 3, the flow between the flow equalization plates 17 can reduce the influence of the filtered gas carrying the water vapor.

[0031] like Figures 1-2 As shown, a heating ring 18 is provided at the position where the air inlet pipe 5 connects to the dust collector housing 1. It is used to heat the gas entering the filter chamber 3. The heating ring 18 initially heats the gas entering the filter chamber 3, while the heating component 10 is used to maintain the temperature inside the filter chamber 3 to prevent temperature fluctuations from causing water vapor to come into contact with the dust collector housing 1 and condense, or to condense on the surface of the filter bag and cause dust to clump together.

[0032] In this embodiment, dust-laden gas is introduced into the filter chamber 3 from the side through the air inlet pipe 5. The dust-laden gas flows around the filter cartridge 2. The exhaust pipe 7 extracts the gas through the clean air chamber 4. The filter cartridge 2 filters the fertilizer or raw material powder. The heating ring 18 and the heating component 10 heat the gas. Water in the gas forms water vapor. The water vapor in the gas that did not pass through the filter bag with the gas moves towards the top of the filter chamber 3 under the action of high temperature. After the water vapor comes into contact with the flow equalization plate 17, it flows towards the conical top 9. It flows towards the condensation bar 12 along the guide plate 16. The water vapor condenses into water droplets. The water droplets flow along the condensation bar 12 and the condensation net 14 to the receiving plate 15 and are discharged through the drain port 11, thus completing the separation of water vapor in the filter chamber 3.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dust removal, purification and recovery device for compound fertilizer production, comprising a dust remover shell (1), a plurality of filter cartridges (2), a plurality of the filter cartridges (2) being detachably connected to the dust remover shell (1), a filter cavity (3) and a clean gas cavity (4) being arranged in the dust remover shell (1), the filter cavity (3) being communicated with an air inlet pipe (5) and a discharge port (6), the clean gas cavity (4) being communicated with an exhaust pipe (7) and a pulse pipe (8), the pulse pipe (8) being communicated with the filter cartridge (2), characterized in that, Also include: Conical top (9) is arranged at the top of the filter cavity (3), the conical top (9) protrudes upwards, a plurality of dew discharge mechanisms are fixedly arranged on the conical top (9); The air inlet pipe (5) is communicated with the side of the filter cavity (3), the filter cartridge (2) is arranged in the filter cavity (3) in an inclined manner, the gas in the filter cavity (3) enters the clean gas cavity (4) after passing through the filter cartridge (2), the gas in the air inlet pipe (5) flows horizontally in the filter cavity (3), and the dew discharge mechanism is arranged above the filter cartridge (2); A plurality of heating components (10) are fixedly connected to the bottom of the filter cavity (3) and can heat the gas in the filter cavity (3); The dew discharge mechanism can condense water vapor collected in the conical top (9) and guide water to flow out of the filter cavity (3).

2. The dust removal, purification and recovery device for compound fertilizer production according to claim 1, characterized in that, The conical top (9) is arranged in an inclined manner, the dew discharge mechanism is also arranged in an inclined manner, a drain port (11) is arranged at a lower position of the filter cavity (3), and the drain port (11) is aligned with the dew discharge mechanism.

3. The dust removal, purification and recovery device for compound fertilizer production according to claim 2, characterized in that, The dew discharge mechanism comprises: A plurality of condensation strips (12) are fixedly connected to the conical top (9), and the two ends of the condensation strip (12) are respectively directed to the higher and lower sides of the conical top (9); A heat exchanger (13) is fixedly installed on the conical top (9) and arranged outside the filter cavity (3), and the two ends of the heat exchanger (13) are respectively communicated with the two ends of the condensation strip (12); A dew net (14) is fixedly connected below the condensation strip (12); A receiving plate (15) is fixedly connected in the filter cavity (3), the receiving plate (15) is arranged below the lower end of the dew net (14), and the drain port (11) is aligned with the receiving plate (15); A gas shunt assembly is fixedly connected in the filter cavity (3) and arranged below the receiving plate (15), and the gas shunt assembly is used to guide the flow of water vapor.

4. The dust removal, purification and recovery device for compound fertilizer production according to claim 3, characterized in that, Water vapor moving upwards in the filter cavity (3) can contact the condensation strip (12) and condense into water droplets, the water droplets on the condensation strip (12) can drop onto the dew net (14), and the water droplets on the dew net (14) can flow to the lower end and drop onto the receiving plate (15).

5. The dust removal, purification and recovery device for compound fertilizer production according to claim 3, characterized in that, The gas flow assembly comprises a plurality of guide plates (16), adjacent guide plates (16) are arranged in an interlaced manner, and gaps exist between adjacent guide plates (16).

6. The dust removal, purification and recovery device for compound fertilizer production according to claim 5, characterized in that, Gaps exist between the higher end and the lower end of the conical top (9) and adjacent guide plates (16).

7. The dust removal, purification and recovery device for compound fertilizer production according to claim 6, characterized in that, High-temperature water vapor in the filter cavity (3) can move upwards into the conical top (9), after water vapor contacts the guide plate (16), the water vapor flows along the guide plate (16) to the higher end of the conical top (9), after the water vapor contacts the condensation strip (12) and is cooled, low-temperature gas flows along the guide plate (16) to the receiving plate (15).

8. The dust removal, purification and recovery device for compound fertilizer production according to claim 1, characterized in that, A plurality of filter cartridges (2) are arranged in groups, gaps are arranged between two adjacent groups of filter cartridges (2), the conical top (9) is arranged between the two groups of filter cartridges (2), each group of filter cartridges (2) is provided below with the discharge port (6), and the heating component (10) is arranged between two adjacent discharge ports (6).

9. The dust removal, purification and recovery device for compound fertilizer production according to claim 1, characterized in that, A plurality of flow uniformizing plates (17) are fixedly connected to the top of the filter cavity (3), the flow uniformizing plates (17) are arranged on both sides of the conical top (9), and the flow uniformizing plates (17) are perpendicular to the filter cartridges (2).

10. The dust removal, purification and recovery device for compound fertilizer production according to claim 1, characterized in that, A heating ring (18) is arranged at the position where the air inlet pipe (5) is connected to the dust remover shell (1), so as to heat the gas entering the filter cavity (3).

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