An integrated treatment tank for ammonium nitrate condensate recovery

Abstract

This invention provides an integrated treatment tank for ammonium nitrate condensate recovery, comprising a lower tank assembly, an upper tank assembly fixedly connected to the upper end of the lower tank assembly, a ceramic filter plate and a support piece inside the lower tank assembly, and an installation plate inside the upper tank assembly. Below the ceramic filter plate is a stirring chamber, between the ceramic filter plate and the support piece is a temporary storage chamber, inside the support piece is a pressure chamber, between the support piece and the installation plate is a concentrated water chamber, and at the inner edge of the upper tank assembly is a clear water chamber. A suction device and a permeate membrane filter tube are interposed on the installation plate, with the lower ends of both the suction device and the permeate membrane filter tube overlapping the support piece. The input end of the suction device is connected to the temporary storage chamber, and the output end of the suction device is connected to the pressure chamber. This invention has the advantages of compact structure and miniaturization.

Description

Technical Field

[0001] This invention relates to the field of ammonium nitrate treatment tank technology, and more particularly to an integrated treatment tank for ammonium nitrate condensate recovery. Background Technology

[0002] The production process of ammonium nitrate involves neutralizing approximately 50% dilute nitric acid with gaseous ammonia. The reaction releases a large amount of heat, the magnitude of which is related to the concentration of nitric acid. Water in the neutralization solution absorbs heat and vaporizes, ultimately yielding a concentrated ammonium nitrate solution of approximately 75%. This solution is further evaporated to obtain the final ammonium nitrate product.

[0003] The steam generated during the production of ammonium nitrate is condensed into condensate wastewater. This wastewater contains usable ammonium nitrate and free acid or free ammonia. Direct discharge of this wastewater would severely pollute the environment and waste recyclable substances.

[0004] In existing ammonium nitrate treatment systems, each treatment step usually requires its own equipment, making the entire system not compact enough and unsuitable for treating small batches of condensate wastewater. For example, the patent titled "Method for Recycling and Treating Ammonium Nitrate Calcium and Ammonium Nitrate Condensate Wastewater" with application number "CN202211295255.6" includes neutralization treatment, temporary storage tanks, heat exchangers, filters, and permeation filtration. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses an integrated treatment tank for ammonium nitrate condensate recovery, comprising a lower tank assembly, an upper tank assembly fixedly connected to the upper end of the lower tank assembly, a ceramic filter plate and a support member inside the lower tank assembly, an installation plate inside the upper tank assembly, a stirring chamber below the ceramic filter plate, a temporary storage chamber between the ceramic filter plate and the support member, a pressure chamber inside the support member, a concentrated water chamber between the support member and the installation plate, and a clear water chamber at the inner edge of the upper tank assembly. This division of the treatment tank into different chambers enables different functions and achieves miniaturization compared to existing ammonium nitrate condensate treatment systems.

[0006] A suction device and a permeate membrane filter tube are interspersed on the mounting plate, with their lower ends resting on a support. The input end of the suction device is connected to a storage chamber, and its output end is connected to a pressure chamber. The input end of the permeate membrane filter tube is connected to the pressure chamber, and its clear water outlet is connected to a clear water chamber, while its concentrated water outlet is connected to a concentrated water chamber. The permeate membrane filter tube is used for ion filtration to filter and recover ammonium nitrate. The suction device is used to pressurize the liquid, ensuring it passes through the permeate membrane filter tube for filtration.

[0007] Preferably, the lower tank component includes a first housing, the interior of which is provided with a mounting ring, and the ceramic filter plate is fixed on the mounting ring. That is, the ceramic filter plate is placed on the mounting ring and then fixed by a clamping component.

[0008] Preferably, a plurality of heat sinks are fixedly connected to the lower sidewall of the first housing, a bottom cover is fitted onto the lower part of the lower can, a drive motor is fixedly connected to the bottom of the first housing, a stirring rod is fixedly connected to the upper end of the drive motor's rotating shaft, and a fan blade is fixedly connected to the lower end of the drive motor's rotating shaft. That is, the drive motor coaxially drives the stirring rod and fan blade to rotate. Simultaneously, the bottom cover is provided at the lower part of the lower can, and the arrangement of the heat sinks forms an air duct, ensuring that air passes through the gaps between the heat sinks and is exhausted from the top, facilitating heat dissipation from the lower part of the lower can.

[0009] Preferably, a conveying pipe is fixedly connected to the lower part of the lower tank. One end of the conveying pipe is connected to the stirring chamber, and the other end is fixedly connected to a premixing pipe. Both the upper and lower ends of the premixing pipe are provided with openings. The upper and lower ends of the premixing pipe are respectively connected to pipelines containing ammonium nitrate condensate and acid-base regulator, and then the mixture is fed into the interior of the lower tank.

[0010] Preferably, the support member is provided with a first mounting hole and a second mounting hole. The lower end of the suction device fits into the first mounting hole, and the lower end of the permeate membrane filter tube fits into the second mounting hole. The first mounting hole and the second mounting hole respectively support the suction device and the permeate membrane filter tube.

[0011] Preferably, the mounting plate has several threaded holes, and a pressure cap is threaded into each of the threaded holes. Several protrusions are fixedly connected to the lower end of the pressure cap, and these protrusions press against the upper end of the permeate membrane filter tube. An overflow groove is formed on the lower side wall of the threaded holes, and the clear water outlet of the permeate membrane filter tube extends upward through the pressure cap. That is, the concentrated water generated during the filtration process enters the space below the pressure cap and flows into the concentrated water chamber through the overflow groove.

[0012] Preferably, the suction device includes a tube body divided into two chambers. The upper chamber extends downward and has an inlet, with a first one-way valve connecting to the upper chamber inside the inlet. The lower chamber has a second one-way valve connected to the upper chamber, and an outlet is located on the side wall of the lower chamber. Specifically, the ammonium nitrate condensate enters through the first one-way valve into the upper chamber, then passes through the second one-way valve and the outlet into the pressure chamber.

[0013] Preferably, an electric cylinder is fixedly connected inside the upper chamber, and a piston is fixedly connected to the output end of the electric cylinder. The movement of the electric cylinder realizes the up-and-down movement of the piston.

[0014] Preferably, the side wall of the upper tank is provided with a concentrated water outlet pipe and a clean water outlet pipe, the concentrated water outlet pipe being connected to the concentrated water chamber, and the clean water outlet pipe being connected to the clean water chamber. The concentrated water outlet pipe and the clean water outlet pipe respectively discharge water.

[0015] Preferably, a top cover is fixedly connected to the upper end of the upper can. The top cover is used to seal the upper end of the upper can.

[0016] The beneficial effects of this invention are as follows: the condensate generated during the production of ammonium nitrate is sent into this tank for treatment, and the tank is equipped with a stirring chamber, a ceramic filter plate, a temporary storage chamber, a permeation membrane filter tube, and a suction device to meet the operation of the permeation membrane filter tube. That is, this tank has the advantages of compact structure and miniaturization. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional schematic diagram of the present invention; Figure 4 This is a cross-sectional schematic diagram of the upper can part of the present invention; Figure 5 This is a cross-sectional schematic diagram of the support component of the present invention; Figure 6 This is a cross-sectional schematic diagram of the lower can of the present invention. Figure 7 for Figure 3 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional schematic diagram of the suction device of the present invention.

[0018] List of reference numerals in the attached diagram: 1. Bottom cover; 2. Premixing pipe; 3. Lower tank component; 4. Upper tank component; 5. Concentrate outlet pipe; 6. Clean water outlet pipe; 7. Top cover; 8. Drive motor; 9. Fan blade; 10. Stirring rod; 11. Ceramic filter plate; 12. Mounting plate; 13. Suction device; 14. Permeate membrane filter tube; 15. Support component; 16. Conveying pipe; 17. Stirring chamber; 18. Temporary storage chamber; 19. Concentrate chamber; 20. Overflow trough; 21. Protrusion; 22. Pressure cap; 31. Heat sink; 32. Mounting ring; 33. First housing; 41. Second housing; 42. Clear water chamber; 131. Inlet; 132. Outlet; 133. First check valve; 134. Second check valve; 135. Pipe body; 136. Piston; 137. Electric cylinder; 151. First mounting hole; 152. Pressure chamber; 153. Second mounting hole. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] like Figures 1 to 8 As shown, an integrated treatment tank for ammonium nitrate condensate recovery includes a lower tank 3, the lower part of which is tapered and formed into a hemispherical shape. An upper tank 4 is fixedly connected to the upper end of the lower tank 3. The lower tank 3 and the upper tank 4 are fixedly connected by a flange. A ceramic filter plate 11 and a support 15 are provided inside the lower tank 3. An installation plate 12 is provided inside the upper tank 4. Below the ceramic filter plate 11 is a stirring chamber 17, which is a chamber used for acid-base balance. A temporary storage chamber 18 is located between the ceramic filter plate 11 and the support 15. The liquid after stirring passes through the ceramic filter plate 11 and enters the temporary storage chamber 18. The support 15 is configured with a pressure chamber 152 inside. A concentrated water chamber 19 is located between the support 15 and the installation plate 12. A clear water chamber 42 is provided on the inner edge of the upper tank 4. The upper tank 4 includes a second shell 41, which is double-layered, with the clear water chamber 42 located on the outer side.

[0021] A suction device 13 and a permeation membrane filter tube 14 are interspersed on the mounting plate 12, with the lower ends of both the suction device 13 and the permeation membrane filter tube 14 overlapping the support 15. The input end of the suction device 13 is connected to the temporary storage chamber 18, and the output end of the suction device 13 is connected to the pressure chamber 152. The input end of the permeation membrane filter tube 14 is also connected to the pressure chamber 152. The suction device 13 pressurizes the liquid in the temporary storage chamber 18 into the pressure chamber 152. The clean water outlet of the permeation membrane filter tube 14 is connected to the clean water chamber 42, and the concentrated water outlet of the permeation membrane filter tube 14 is connected to the concentrated water chamber 19. Only the water in the pressure chamber 152 enters the permeation membrane filter tube 14, and the filtered water enters the clean water chamber 42.

[0022] The lower tank component 3 includes a first housing 33, an installation ring 32 is provided inside the first housing 33, and the ceramic filter plate 11 is fixed on the installation ring 32. Furthermore, a clamping component is provided on the upper edge of the ceramic filter plate 11, and the clamping component is fixedly connected to the installation ring 32 by bolts.

[0023] Several heat sinks 31 are fixedly connected to the lower side wall of the first housing 33. During the acid-base neutralization process, a large amount of heat is generated, which is cooled by the heat sinks 31. A bottom cover 1 is sleeved on the lower part of the lower tank 3. An opening is provided at the lower end of the bottom cover 1, and an air duct is formed between the bottom cover 1 and the heat sinks 31. The air flow carries away the heat. A drive motor 8 is fixedly connected to the bottom of the first housing 33. Similarly, the drive motor 8 is fixedly connected to the lower part of the first housing 33 by a farad connection. A stirring rod 10 is fixedly connected to the upper end of the drive motor 8. When the drive motor 8 is working, it drives the stirring rod 10 to rotate, thereby fully stirring the liquid in the stirring chamber 17. A fan blade 9 is fixedly connected to the lower end of the drive motor 8. When the drive motor 8 is working, the fan blade 9 rotates and draws in air from below, which is sent into the air duct to carry away the heat on the heat sinks 31.

[0024] The lower part of the lower tank 3 is fixedly connected to a conveying pipe 16. One end of the conveying pipe 16 is connected to the stirring chamber 17, and the other end is fixedly connected to a premixing pipe 2. Both the upper and lower ends of the premixing pipe 2 are provided with openings to send the condensate containing ammonium nitrate and the acid-base regulator into the stirring chamber 17.

[0025] The support 15 is provided with a first mounting hole 151 and a second mounting hole 153. Specifically, the support 15 is a hollow component. The first mounting hole 151 passes through the upper and lower ends of the support 15, while the second mounting hole 153 passes through the upper end of the support 15. The lower end of the suction device 13 fits into the first mounting hole 151, and the lower end of the permeate membrane filter tube 14 fits into the second mounting hole 153. Therefore, after the suction device 13 and the permeate membrane filter tube 14 are installed, the input end of the suction device 13 is connected to the temporary storage chamber 18, and the input end of the permeate membrane filter tube 14 is connected to the pressure chamber 152.

[0026] The mounting plate 12 has several threaded holes, and a pressure cap 22 is threaded into the threaded holes. Several protrusions 21 are fixedly connected to the lower end of the pressure cap 22, and the protrusions 21 are pressed against the upper end of the permeate membrane filter tube 14. That is, the pressure cap 22 presses down on the permeate membrane filter tube 14. The protrusions 21 ensure that there is a gap between the two. An overflow groove 20 is provided on the lower side wall of the threaded hole. That is, the concentrated water produced by filtration enters the concentrated water chamber 19 through the gap and the overflow groove 20. The clear water outlet of the permeate membrane filter tube 14 passes through the pressure cap 22 upward, and the clear water produced after filtration enters the clear water chamber 42.

[0027] The suction device 13 includes a tube body 135, which is divided into two chambers. The upper chamber extends downward and is provided with an inlet 131, which connects the suction device 13 to the storage chamber 18. The inlet 131 is provided with a first one-way valve 133 that leads to the upper chamber, allowing water to enter the upper chamber only through the inlet 131. The lower chamber is provided with a second one-way valve 134 that connects to the upper chamber. The second one-way valve 134 allows liquid from the upper chamber to flow directly into the lower chamber. The side wall of the lower chamber is provided with an outlet 132, through which liquid enters the pressure chamber 152.

[0028] An electric cylinder 137 is fixedly connected inside the upper chamber, and a piston 136 is fixedly connected to the output end of the electric cylinder 137. When the electric cylinder 137 is working, it realizes the up and down movement of the piston 136, that is, it realizes the sending of water in the temporary storage chamber 18 into the pressure chamber 152.

[0029] The side wall of the upper tank 4 is provided with a concentrated water outlet pipe 5 and a clean water outlet pipe 6. The concentrated water outlet pipe 5 is connected to the concentrated water chamber 19, and the clean water outlet pipe 6 is connected to the clean water chamber 42. The concentrated water outlet pipe 5 and the clean water outlet pipe 6 deliver the filtered liquid.

[0030] A top cover 7 is fixedly connected to the upper end of the upper tank component 4. The top cover 7 seals the upper end of the upper tank component 4.

[0031] Furthermore, the structures between the two adjacent chambers mentioned above are all equipped with sealing structures. For example, a sealing ring is provided on the edge of the ceramic filter plate 11 located between the stirring chamber 17 and the temporary storage chamber 18.

[0032] Working principle: When in use, condensed water containing ammonium nitrate and acid-base regulator are sent from the premixing pipe 2 and enter the mixing chamber 17. The drive motor 8 works, the stirring rod 10 and the fan blade 9 rotate. The stirring rod 10 rotates to mix the liquid in the mixing chamber 17, while the fan blade 9 rotates to draw in air from below and dissipate the generated heat through the heat sink 31. Then, under the pressure of the suction device 13 and the external pump, the liquid passes through the ceramic filter plate 11 and enters the temporary storage chamber 18, and is sent into the pressure chamber 152. Specifically, the piston 136 moves upward, the upper chamber is under negative pressure, the first one-way valve 133 in the inlet 131 opens and draws liquid from the temporary storage chamber 18, the piston 136 moves downward, the pressure in the upper chamber increases, the liquid passes through the second one-way valve 134 and enters the lower chamber, and at the same time the outlet is set so that the liquid enters the pressure chamber 152. Under the pressure of the suction device 13, the liquid is forced into the permeate membrane filter tube 14. The clean water produced in the process enters the clean water chamber 42, while the concentrated water produced enters the concentrated water chamber 19 from the gap below the pressure cap 22 and the overflow trough 20. The concentrated water can be recycled to generate benefits, while the clean water can be reused.

[0033] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. An integrated treatment tank for ammonium nitrate condensate recovery, characterized in that, The device includes a lower tank (3), an upper tank (4) is fixedly connected to the upper end of the lower tank (3), a ceramic filter plate (11) and a support (15) are provided inside the lower tank (3), an installation plate (12) is provided inside the upper tank (4), a stirring chamber (17) is located below the ceramic filter plate (11), a temporary storage chamber (18) is located between the ceramic filter plate (11) and the support (15), a pressure chamber (152) is located inside the support (15), a concentrated water chamber (19) is located between the support (15) and the installation plate (12), and a clear water chamber (42) is provided on the inner edge of the upper tank (4). A suction device (13) and a permeation membrane filter tube (14) are interspersed on the mounting plate (12), and the lower ends of the suction device (13) and the permeation membrane filter tube (14) are both attached to the support (15). The input end of the suction device (13) is connected to the storage chamber (18), and the output end of the suction device (13) is connected to the pressure chamber (152). The input end of the permeation membrane filter tube (14) is connected to the pressure chamber (152), and the clear water outlet of the permeation membrane filter tube (14) is connected to the clear water chamber (42). The concentrated water outlet of the permeation membrane filter tube (14) is connected to the concentrated water chamber (19).

2. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The lower tank component (3) includes a first housing (33), an installation ring (32) is provided inside the first housing (33), and a ceramic filter plate (11) is fixed on the installation ring (32).

3. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 2, characterized in that: A number of heat sinks (31) are fixedly connected to the lower side wall of the first housing (33), a bottom cover (1) is sleeved on the lower part of the lower tank (3), a drive motor (8) is fixedly connected to the bottom of the first housing (33), a stirring rod (10) is fixedly connected to the upper end of the drive motor (8), and a fan blade (9) is fixedly connected to the lower end of the drive motor (8).

4. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The lower tank (3) is fixedly connected to a conveying pipe (16). One end of the conveying pipe (16) is connected to the stirring chamber (17), and the other end is fixedly connected to a premixing pipe (2). Both the upper and lower ends of the premixing pipe (2) are provided with openings.

5. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The support (15) is provided with a first mounting hole (151) and a second mounting hole (153). The lower end of the suction device (13) is fitted in the first mounting hole (151), and the lower end of the permeation membrane filter tube (14) is fitted in the second mounting hole (153).

6. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The mounting plate (12) has several threaded holes, and a pressure cap (22) is threaded into the threaded holes. Several protrusions (21) are fixedly connected to the lower end of the pressure cap (22), and the protrusions (21) are pressed against the upper end of the permeation membrane filter tube (14). An overflow groove (20) is provided on the lower side wall of the threaded hole, and the clean water outlet of the permeation membrane filter tube (14) passes through the pressure cap (22) upward.

7. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The suction device (13) includes a tube body (135), which is divided into two chambers. The upper chamber extends downward and is provided with an inlet (131). The inlet (131) is provided with a first one-way valve (133) leading to the upper chamber. The lower chamber is provided with a second one-way valve (134) and is connected to the upper chamber. The side wall of the lower chamber is provided with an outlet (132).

8. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 7, characterized in that: An electric cylinder (137) is fixedly connected inside the upper chamber, and a piston (136) is fixedly connected to the output end of the electric cylinder (137).

9. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The side wall of the upper tank (4) is provided with a concentrated water outlet pipe (5) and a clean water outlet pipe (6). The concentrated water outlet pipe (5) is connected to the concentrated water chamber (19), and the clean water outlet pipe (6) is connected to the clean water chamber (42).

10. The integrated treatment tank for ammonium nitrate condensate recovery according to claim 1, characterized in that: The upper end of the upper tank (4) is fixedly connected to the upper cover (7).

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