A quality upgrading device for by-product hydrochloric acid of sulfur-based compound fertilizer

Abstract

The utility model relates to the field of hydrochloric acid purification discloses a kind of sulphur-based compound fertilizer by-product hydrochloric acid's upgrading equipment, including coarse salt water tank and desalted water tank, the top of coarse salt water tank is equipped with absorption tower, the bottom and top of absorption tower outer surface are equipped with air inlet and exhaust port in sequence, the downside of absorption tower inner wall is equipped with atomizing tank, the inside of atomizing tank is provided with ultrasonic device, the outside of atomizing tank is provided with multiple groups of spray module.This device is discharged to the inner chamber of absorption tower by mist outlet after atomization desalted water, and the atomization contact area formed by the equidistant arrangement of multiple dispersion frames, when tail gas passes through this area, it can be fully contacted with the desalted water after atomization, and the gas mist will not produce obvious resistance to tail gas, and will not reduce the speed of tail gas rising, the design of the application can significantly improve the working efficiency of device.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid purification technology, and in particular to a quality improvement device for hydrochloric acid by-product of sulfur-based compound fertilizer. Background Technology

[0002] Sulfur-based compound fertilizers produce hydrochloric acid as a byproduct during their production process. This is mainly obtained by heating ammonium chloride to decompose it into hydrogen chloride gas, which is then absorbed by water. However, the hydrochloric acid produced at this stage is crude hydrochloric acid (gaseous HCl), which contains a large number of impurities. Therefore, its purity and appearance are not good enough to be sold as a byproduct and it cannot generate economic benefits.

[0003] To address this issue, Chinese Patent D1 with application number CN202122591649.3 discloses a quality improvement device for hydrochloric acid by-product of sulfur-based compound fertilizer. It designs a complete process for quality improvement of crude hydrochloric acid by-product of sulfur-based compound fertilizer: the core components include a condenser, an absorption tower, a filter, and a decolorization device, which are used for condensing, absorbing gaseous hydrochloric acid, filtering impurities, and decolorizing, respectively. The absorption tower, as the core equipment for upgrading crude hydrochloric acid, mainly uses demineralized water to absorb gaseous hydrochloric acid. D1 uses a falling film absorption tower, which uses packing to disperse the crude brine and allow it to fully contact and absorb other hydrochloric acids. However, this conventional absorption tower structure still has room for improvement. Combining existing technology with the upgrading of crude hydrochloric acid in D1, the demineralized water flows from top to bottom, while the tail gas (including hydrochloric acid and other impurities) generated by the reaction moves from bottom to top. The two flow counter-currently, thus making contact and absorption. However, the contact area between the demineralized water and gaseous hydrochloric acid after passing through the packing is limited, and the downward flow of water will cover the upward channel of the tail gas as much as possible, thereby increasing the contact and absorption area. But this will, to some extent, hinder the upward discharge speed of the treated tail gas (at which time HCl is absorbed), causing the overall tail gas to enter and exit the absorption tower to slow down, thereby reducing the treatment efficiency of gaseous hydrochloric acid, which urgently needs to be solved. Utility Model Content

[0004] This invention proposes an equipment for improving hydrochloric acid produced as a byproduct of sulfur-based compound fertilizer, which has the advantage of high processing efficiency and solves the problem of low processing efficiency in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an upgrading device for hydrochloric acid by-product of sulfur-based compound fertilizer, comprising a crude brine tank and a desalination tank, wherein an absorption tower is installed on the top of the crude brine tank, and an air inlet and an exhaust outlet are sequentially installed on the bottom and top of the outer surface of the absorption tower, an atomizing box is installed on the lower side of the inner wall of the absorption tower, an ultrasonic device is installed inside the atomizing box, multiple spray modules are installed on the outer side of the atomizing box, and a misalignment module is installed on the top of the inner wall of the absorption tower; The spray module includes a mist exhaust pipe fixedly connected to the outer surface of the atomizing box. One end of the mist exhaust pipe is fixedly connected to a dispersing frame. The inner cavity of the dispersing frame is provided with a mist storage chamber. Both the inner and outer sides of the dispersing frame are provided with mist exhaust ports. The inner cavity of the demineralized water tank is filled with demineralized water. A pump and a connecting pipe 1 are installed inside the demineralized water tank. A connecting pipe 2, which runs to the right through the inner wall of the absorption tower, is fixedly connected to the top of the atomizing box. The connecting pipe 2 is connected to the connecting pipe 1.

[0006] As a preferred embodiment of this utility model, the misaligned module includes a second blocking block and a first blocking block, which are distributed vertically and fixedly connected to the inner wall of the absorption tower. A guide ring is fixedly connected to the top of both the first blocking block and the second blocking block. Multiple sets of through holes extending downward to the bottom are opened on the top of both the first blocking block and the second blocking block. A gap is left between the first blocking block and the second blocking block, and the two are misaligned around their own axes.

[0007] As a preferred embodiment of this utility model, the axial cross-sectional shape of the guide ring is a right triangle, and the top of the guide ring is an inclined surface with a lower inner side and a higher outer side.

[0008] As a preferred embodiment of this utility model, a plurality of support columns are fixedly connected to the bottom of the outer surface of the atomizing box, and one end of the support column is fixedly connected to the inner wall of the absorption tower.

[0009] As a preferred embodiment of this utility model, the top of the atomizing box is conical, and the end of the exhaust pipe connected to the atomizing box is higher than the end connected to the dispersing frame.

[0010] As a preferred embodiment of this utility model, the dispersion frame is fan-shaped, the middle part of the dispersion frame is hollow, and the lowest height of the mist outlet is equal to the lowest point of the inner cavity of the mist storage chamber.

[0011] As a preferred embodiment of this utility model, a liquid level sensor is installed in the inner cavity of the atomizing box, and there are six sets of mist exhaust pipes and dispersion frames, which are all distributed equidistantly around the outer surface of the atomizing box.

[0012] The beneficial effects of this utility model are as follows: 1. This device has been redesigned to present the demineralized water used to absorb gaseous HCl in the exhaust gas as an aerosol via ultrasonic waves. The purpose is to increase the contact area between the demineralized water and the gaseous HCl, thereby significantly improving the device's absorption efficiency for gaseous HCl. The device uses an atomizing box to receive the demineralized water from the demineralized water tank, which is built inside the absorption tower. The ultrasonic device inside the atomizing box atomizes the demineralized water into an aerosol state, and then delivers the atomized demineralized water to the dispersion frame through the mist exhaust pipe. Finally, the atomized demineralized water is horizontally discharged into the inner cavity of the absorption tower through the mist exhaust port. The atomization contact area formed by multiple sets of dispersion frames arranged at equal intervals allows the exhaust gas to fully contact the atomized demineralized water as it passes through this area, and the aerosol does not create significant resistance to the exhaust gas or reduce its upward speed. The design of this application can significantly improve the working efficiency of the device.

[0013] 2. This device also includes a staggered module located at the top of the absorption tower's inner cavity. This module retains any unconsumed aerosol demineralized water around the dispersion frame and distributes it in liquid form across the surfaces of barrier blocks one and two. To ensure that the exhaust gas is completely absorbed by the aerosol demineralized water discharged from the mist outlet as it passes around the dispersion frame, the amount of aerosol demineralized water must exceed the maximum amount of gaseous HCl it can consume from the exhaust gas. This design maximizes the absorption efficiency of gaseous HCl through saturated absorption. The staggered module, through the vertical distribution of barrier blocks one and two and their staggered distribution around its own axis, allows the aerosol passing through this module to be retained by the solid parts that contact the surfaces of barrier blocks one and two, forming liquid demineralized water adhering to their surfaces, thus achieving secondary absorption of the exhaust gas. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention in a clear and understandable manner.

[0015] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a front sectional view of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A; Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point B; Figure 4 This is a front perspective view of the overall structure of this utility model; Figure 5This is a schematic diagram showing the separation of the connecting pipe II, support column, atomizing box, mist exhaust pipe and dispersion frame of this utility model; Figure 6 This is a top sectional view of the atomizing box and dispersing frame of this utility model; Figure 7 This is a top view of the misalignment module of this utility model.

[0016] The components are as follows: 1. Coarse brine tank; 2. Absorption tower; 3. Air inlet; 4. Demineralized water tank; 5. Pump; 6. Connecting pipe one; 7. Connecting pipe two; 8. Exhaust port; 9. Support column; 10. Atomizing box; 11. Ultrasonic device; 12. Liquid level sensor; 13. Mist exhaust pipe; 14. Dispersion frame; 15. Mist exhaust port; 16. Mist storage chamber; 17. Barrier block one; 18. Barrier block two; 19. Guide ring; 20. Through hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-7 This embodiment discloses an equipment for improving hydrochloric acid by-product of sulfur-based compound fertilizer, including a crude brine tank 1 and a desalination tank 4. An absorption tower 2 is installed on the top of the crude brine tank 1. An air inlet 3 and an exhaust port 8 are installed sequentially on the bottom and top of the outer surface of the absorption tower 2. An atomizing box 10 is installed on the lower side of the inner wall of the absorption tower 2. An ultrasonic device 11 is installed inside the atomizing box 10. Multiple spray modules are installed on the outer side of the atomizing box 10. A misalignment module is installed on the top of the inner wall of the absorption tower 2. The spray module includes a mist exhaust pipe 13 fixedly connected to the outer surface of the atomizing box 10. One end of the mist exhaust pipe 13 is fixedly connected to a dispersing frame 14. The inner cavity of the dispersing frame 14 is provided with a mist storage chamber 16. Both the inner and outer sides of the dispersing frame 14 are provided with mist exhaust ports 15. The inner cavity of the demineralized water tank 4 is filled with demineralized water. A pump 5 and a connecting pipe 6 are installed inside the demineralized water tank 4. The top of the atomizing box 10 is fixedly connected to a connecting pipe 7 that penetrates the inner wall of the absorption tower 2 to the right. The connecting pipe 7 and the connecting pipe 6 are connected. This device has been redesigned to present the demineralized water used to absorb gaseous HCl in the exhaust gas as an aerosol via ultrasonic waves. The purpose is to increase the contact area between the demineralized water and the gaseous HCl, thereby significantly improving the device's absorption efficiency for gaseous HCl. The device receives the demineralized water from the demineralized water tank 4 through an atomizing box 10, which is built inside the absorption tower 2. The ultrasonic device 11 inside the atomizing box 10 atomizes the demineralized water into an aerosol state, and the atomized demineralized water is transported to the dispersion frame 14 through the mist exhaust pipe 13. Finally, the atomized demineralized water is horizontally discharged into the inner cavity of the absorption tower 2 through the mist exhaust port 15. The atomization contact area formed by multiple sets of dispersion frames 14 arranged at equal intervals allows the exhaust gas to fully contact the atomized demineralized water when passing through this area, and the aerosol does not create significant resistance to the exhaust gas or reduce the speed of the exhaust gas rise. The design of this application can significantly improve the working efficiency of the device.

[0019] The misaligned module includes two blocking blocks 18 and one blocking block 17, which are distributed vertically and fixedly connected to the inner wall of the absorption tower 2. The top of both the first blocking block 17 and the second blocking block 18 is fixedly connected to a flow guide ring 19. The top of both the first blocking block 17 and the second blocking block 18 has multiple sets of through holes 20 that extend downward to the bottom. There is a gap between the first blocking block 17 and the second blocking block 18, and the two are misaligned around their own axes. Because the through-hole 20 reduces the space for the exhaust gas to rise, the exhaust gas rises faster, thus effectively increasing the efficiency of discharging the treated waste gas.

[0020] This device also includes a staggered module located at the top of the inner cavity of the absorption tower 2. The function of this module is to retain the unconsumed aerosol demineralized water around the dispersion frame 14 and to distribute it in liquid form on the surfaces of the first barrier block 17 and the second barrier block 18. To ensure that the exhaust gas can be completely absorbed by the aerosol demineralized water discharged from the mist outlet 15 when passing around the dispersion frame 14, the amount of aerosol demineralized water is greater than the maximum amount of gaseous HCl in the exhaust gas that it can consume. This design maximizes the absorption efficiency of gaseous HCl through saturated absorption. The staggered module, through the vertical distribution of the second barrier block 18 and the first barrier block 17, as well as their staggered distribution around their own axis, allows the aerosol passing through this module to be retained by the solid parts that come into contact with the surfaces of the first barrier block 17 and the second barrier block 18, forming liquid demineralized water that adheres to the surfaces of the first barrier block 17 and the second barrier block 18, thereby achieving secondary absorption of the exhaust gas.

[0021] Among them, the axial cross-sectional shape of the guide ring 19 is a right triangle, and the top of the guide ring 19 is an inclined surface with a lower inner side and a higher outer side; like Figure 2As shown, when the aerosol demineralized water comes into contact with the surfaces of the second barrier block 18 and the first barrier block 17, it will be retained to form liquid water. At this time, the guide ring 19 with the inclined surface can help guide the liquid demineralized water into the through hole 20 to prevent demineralized water residue.

[0022] Among them, multiple sets of support columns 9 are fixedly connected to the bottom of the outer surface of the atomizing box 10, and one end of the support column 9 is fixedly connected to the inner wall of the absorption tower 2. like Figure 1 As shown, the atomizing box 10 is fixedly installed on the lower side of the inside of the absorption tower 2 by the support column 9, and the axis of the atomizing box 10 and the absorption tower 2 are kept collinear, so that a standard annular area for the exhaust gas to rise is formed between the absorption tower 2 and the atomizing box 10.

[0023] The top of the atomizing box 10 is conical, and the end of the exhaust pipe 13 connected to the atomizing box 10 is higher than the end connected to the dispersing frame 14. When the liquid demineralized water adhering to the surfaces of the first barrier block 17 and the second barrier block 18 drips onto the surface of the atomizing box 10, the conical distribution at the top of the atomizing box 10 can guide the flow and prevent demineralized water residue.

[0024] The dispersion frame 14 is fan-shaped, and the middle part of the dispersion frame 14 is hollow. The lowest height of the mist outlet 15 is the same as the lowest point of the inner cavity of the mist storage chamber 16. like Figure 5 , Figure 6 As shown, the fan-shaped distribution of the dispersion frame 14, together with the multiple sets of mist exhaust ports 15 opened on its surface, enables the aerosol demineralized water to be dispersed to the maximum extent and efficiently around the dispersion frame 14. This design allows the exhaust gas and the demineralized water to form the largest contact area, while the mist exhaust port 15 at the lowest point can guide the liquid demineralized water in the mist storage chamber 16 downward to prevent residue.

[0025] The atomizing box 10 is equipped with a liquid level sensor 12, and there are six sets of mist exhaust pipes 13 and dispersion frames 14, which are all distributed equidistantly around the outer surface of the atomizing box 10. like Figure 6 As shown, exhaust gas can pass through the gaps between the six sets of dispersion frames 14 and the middle of each set of dispersion frames 14, and desalination water mist can be emitted. Therefore, a dead-angle absorption area can be generated around the dispersion frames 14 for absorbing gaseous HCl in the exhaust gas.

[0026] Working principle: When this device is in operation: First, start pump 5 and let the demineralized water in the demineralized water tank 4 enter the interior of the atomizing box 10 through connecting pipe 1 6 and connecting pipe 2 7. The liquid level sensor 12 is responsible for monitoring the liquid level of the demineralized water inside the liquid level sensor 12, so that it is lower than the opening of the atomizing box 10 connected to the mist exhaust pipe 13. At the same time, turn on the ultrasonic device 11, so that the demineralized water in the atomizing box 10 is gradually converted into mist. The mist enters the mist storage chamber 16 along the mist exhaust pipe 13. Then, the exhaust gas enters the inner cavity of the absorption tower 2 through the inlet 3, then moves upward and passes through the dispersion frame 14, such as... Figure 1 and Figure 6 As shown, when the exhaust gas passes through the space around the periphery and the middle of the multiple sets of dispersion frames 14, the mist spreads rapidly in the mist storage chamber 16 and is discharged horizontally from the dispersion frames 14 along the mist outlets 15 at various locations, and comes into contact with the exhaust gas passing through here. Since the mist is atomized droplets generated by the demineralized water through the ultrasonic device 11, it can significantly increase the contact area with the gaseous HCl in the exhaust gas. In the dispersion frame 14, a large amount of gaseous HCl in the exhaust gas comes into contact with the demineralized water mist and is absorbed, thereby forming a liquid and falling into the coarse brine tank 1. Finally, when the unabsorbed portion of the exhaust gas and aerosol moves upward into the first barrier block 17 and the second barrier block 18, it enters the narrow through-hole 20 together. During this process, the remaining gaseous HCl in the exhaust gas comes into full contact with the aerosol, forming a liquid that flows back into the coarse brine tank 1. When the mixture of aerosol and exhaust gas passes through the first barrier block 17 and enters the second barrier block 18, the aerosol comes into full contact with the surface of the second barrier block 18 due to the gap between the first barrier block 17 and the second barrier block 18, forming liquid demineralized water on its surface, which then further contacts and absorbs the exhaust gas passing through the through-hole 20.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for improving hydrochloric acid produced as a byproduct of sulfur-based compound fertilizer, comprising a crude brine tank (1) and a desalination tank (4), characterized in that, An absorption tower (2) is installed on the top of the crude salt water tank (1). An air inlet (3) and an exhaust outlet (8) are installed sequentially on the bottom and top of the outer surface of the absorption tower (2). An atomizing box (10) is installed on the lower side of the inner wall of the absorption tower (2). An ultrasonic device (11) is installed inside the atomizing box (10). Multiple spray modules are installed on the outer side of the atomizing box (10). A misalignment module is installed on the top of the inner wall of the absorption tower (2). The spray module includes a mist exhaust pipe (13) fixedly connected to the outer surface of the atomizing box (10). One end of the mist exhaust pipe (13) is fixedly connected to a dispersing frame (14). The inner cavity of the dispersing frame (14) is provided with a mist storage chamber (16). Both the inner and outer sides of the dispersing frame (14) are provided with mist exhaust ports (15). The inner cavity of the desalination tank (4) is filled with desalinated water. A pump (5) and a connecting pipe (6) are installed inside the desalination tank (4). The top of the atomizing box (10) is fixedly connected to a connecting pipe (7) that penetrates the inner wall of the absorption tower (2) to the right. The connecting pipe (7) and the connecting pipe (6) are connected.

2. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 1, characterized in that, The misaligned module includes two blocking blocks (18) and one blocking block (17) that are distributed vertically and fixedly connected to the inner wall of the absorption tower (2). Both the top of the first blocking block (17) and the second blocking block (18) are fixedly connected to a flow guide ring (19). Both the top of the first blocking block (17) and the second blocking block (18) have multiple sets of through holes (20) that extend downward to the bottom. There is a gap between the first blocking block (17) and the second blocking block (18), and they are misaligned around their own axes.

3. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 2, characterized in that, The axial cross-section of the guide ring (19) is a right triangle, and the top of the guide ring (19) is an inclined surface with a lower inner side and a higher outer side.

4. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 3, characterized in that, Multiple sets of support columns (9) are fixedly connected to the bottom of the outer surface of the atomizing box (10), and one end of the support column (9) is fixedly connected to the inner wall of the absorption tower (2).

5. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 4, characterized in that, The top of the atomizing box (10) is conical, and the end of the exhaust pipe (13) connected to the atomizing box (10) is higher than the end connected to the dispersing frame (14).

6. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 5, characterized in that, The dispersion frame (14) is fan-shaped, and the middle part of the dispersion frame (14) is hollow. The lowest height of the mist outlet (15) is the same as the lowest point of the inner cavity of the mist storage chamber (16).

7. The upgrading equipment for hydrochloric acid by-product of sulfur-based compound fertilizer according to claim 6, characterized in that, The atomizing box (10) is equipped with a liquid level sensor (12) in its inner cavity. The number of the mist exhaust pipe (13) and the dispersion frame (14) are six sets, and they are all distributed equidistantly around the outer surface of the atomizing box (10).

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