Nitrate slurry self-circulation system
The nitro slurry self-circulation system solves the problem of nitro slurry blockage during off-peak production, realizes efficient recycling of nitro slurry, and ensures normal system operation and product quality.
Patent Information
- Application Number
- CN202422821649.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-19
AI Technical Summary
During off-peak production, blockages in the nitrogen foot cause disruptions to the production system, affecting product quality and normal system operation. Existing technologies are unable to effectively solve this problem.
The system employs a self-circulating nitric slurry system, which uses a circulation loop consisting of a mother liquor storage tank, a circulation pump, an evaporation chamber, a jacket, and a nitric slurry pump to achieve self-circulation of the nitric slurry, preventing it from entering the separation tank. White water is used to dilute and rinse the crystals, ensuring smooth system operation.
During off-peak production, nitrogen slurry blockage was avoided, ensuring the normal operation of the system and product quality, reducing the generation of mechanical impurities, and realizing the efficient recycling of nitrogen slurry.
Smart Images
Figure CN223602041U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of mirabilite preparation, and particularly relates to a nitrate slurry self-circulation system. BACKGROUND
[0002] At present, mirabilite is produced by using nitrate water of salt associated ore, and needs to be evaporated, concentrated and crystallized through multi-effect evaporation tanks, and then is obtained after liquid-solid separation. The common method for the liquid-solid separation step is to discharge concentrated liquid with a temperature of 110 DEG C or above, sodium sulfate content of 50% or above and sodium chloride content of 250-280 g / L from the terminal evaporation tank, thicken through thickening equipment, and then separate liquid and solid, dry to obtain finished sodium sulfate. The thickening equipment and the mother liquor generated after the liquid-solid separation enter the upper-stage evaporation tank.
[0003] Before the nitrate slurry realizes self-circulation, serious influence on production may occur in staggered peak production in the power peak period, such as that the nitrate foot is seriously blocked due to the large amount of nitrate fine crystals separated and settled in the nitrate separator, the temperature of the whole system may be greatly reduced due to the large amount of white water entering for dredging the nitrate foot, so that the compressor may not normally operate, and the production is stopped, and mechanical impurities are generated during dredging the nitrate foot, and the product quality is affected. If the nitrate slurry is externally circulated, the settling barrel may be blocked or the heating pipe may be blocked due to the tube blockage. Therefore, it is necessary to reform the nitrate slurry self-circulation process to realize staggered peak production. CONTENT OF THE UTILITY MODEL
[0004] The application aims at solving the problem that the nitrate foot is blocked in the staggered peak production, the subsequent dredging is difficult, and the product quality is affected, and provides a nitrate slurry self-circulation system.
[0005] The technical scheme adopted by the application is as follows: the nitrate slurry self-circulation system comprises a mother liquor storage tank, the front end of the mother liquor storage tank is fixedly connected with a feeding pipe, the top end of the feeding pipe is fixedly connected with a circulating pipe, the top end of the circulating pipe is fixedly connected with a circulating pump, the top of the circulating pump is fixedly connected with a feeding pipe, the surface of the feeding pipe is installed with a heat exchange pipe, the top end of the feeding pipe is fixedly installed with an evaporation chamber, the lower end of the evaporation chamber is fixedly installed with a nitrate foot, the surface of the nitrate foot is sleeved with a jacket, the upper side end of the jacket is fixedly connected with a circulating pipe, the lower side end of the jacket is fixedly connected with a nitrate slurry pipe, the top end of the nitrate slurry pipe is fixedly connected with a nitrate slurry pump, the top end of the nitrate slurry pump is fixedly connected with a discharging pipe, the surface of the discharging pipe is installed with a first valve, the side end of the discharging pipe is fixedly connected with a second circulating pipe, the surface of the second circulating pipe is installed with a second valve, and the top end of the second circulating pipe is fixedly connected with the mother liquor storage tank.
[0006] The inside of the mother liquor storage tank is used for storing raw materials and subsequent circulating mother liquor, and the raw materials can be sent to the inside of the evaporation chamber for evaporation and purification through the heat exchange pipe by the circulating pump. The evaporated material in the evaporation chamber is discharged from the nitrate foot to the inside of the jacket, and the crystallization is carried out in the inside of the jacket, and the remaining nitrate slurry after crystallization can be backflowed through the circulating pipe. The nitrate slurry after multiple circulations can be sent to the nitrate slurry pump through the nitrate slurry pipe at the bottom of the jacket, and the nitrate slurry pump is used to extract and send to the inside of the separation barrel through the discharge pipe for separation. The liquid obtained by separation or sedimentation is backflowed to the inside of the mother liquor storage tank for recycling, and the remaining material is dried to obtain the product. When peak-shifting production occurs during production, the nitrate slurry self-circulation can be started. By closing the first valve and opening the second valve, the circulating nitrate slurry is prevented from being sent to the inside of the separation barrel, and the inside of the separation barrel is prevented from being blocked during peak-shifting production. The nitrate slurry is backflowed to the inside of the mother liquor storage tank through the second circulating pipe for storage.
[0007] In a preferred embodiment, the top end of the discharge pipe is provided with a separation barrel, the inside of the separation barrel is provided with an inner sleeve barrel, the surface of the inner sleeve barrel is provided with a leakage hole, the bottom of the separation barrel is fixedly connected with a backflow pipe, and the top end of the backflow pipe is fixedly connected with a mother liquor storage tank.
[0008] By adopting the above technical scheme, the inside of the inner sleeve barrel is used for separating or sedimenting the product.
[0009] In a preferred embodiment, the top of the separation barrel is fixedly connected with a rack, the top of the rack is fixedly provided with an electric lifting rod, and the lower end of the electric lifting rod is height-connected with a motor table.
[0010] By adopting the above technical scheme, when the electric lifting rod is started, the motor table can be driven to move up and down, and the motor can be driven to move up and down.
[0011] In a preferred embodiment, the side end of the motor table is slidingly connected with a rack, the bottom end of the motor table is fixedly provided with a motor, and the lower end of the motor is fixedly connected with a rotating rod.
[0012] By adopting the above technical scheme, the motor can drive the rotating rod to rotate.
[0013] In a preferred embodiment, the side end of the rotating rod is fixedly connected with a stirring blade, and the bottom end of the rotating rod is fixedly connected with a scraper.
[0014] By adopting the above technical scheme, when the rotating rod rotates, the stirring blade can be driven to rotate, and the slurry in the inner sleeve barrel can be stirred. When the electric lifting rod is started to drive the scraper to move upward, the raw materials on the side wall of the inner sleeve barrel can be scraped off.
[0015] In a preferred embodiment, the inner upper end of the jacket is provided with a circulating chamber, the side end of the circulating chamber is fixedly connected with a white water pipe, and the inner lower end of the jacket is provided with a crystallization chamber.
[0016] By using the above technical scheme, the white water pipe is used for adding white water, diluting and flushing the crystallized materials blocked in the nitrate foot and the jacket, and avoiding blocking the nitrate slurry outlet. The materials evaporated in the jacket are crystallized, and the crystallized materials are left in the crystallization chamber.
[0017] In a preferred embodiment, the front end of the heat exchange pipe is fixedly connected with a cold water outlet, and the rear end of the heat exchange pipe is fixedly connected with a steam inlet.
[0018] By using the above technical scheme, the circulating nitrate slurry can be heated by the steam inlet and the cold water outlet.
[0019] In a preferred embodiment, the top of the evaporation chamber is fixedly connected with an exhaust pipe.
[0020] By using the above technical scheme, the exhaust pipe is used for exhausting the gas during the purification evaporation.
[0021] In summary, due to the use of the above technical scheme, the beneficial effects of the present application are:
[0022] In the present application, when the peak-shaving production condition occurs, the nitrate slurry self-circulation can be started. By closing the first valve and opening the second valve, the circulating nitrate slurry is prevented from being sent to the inside of the separation bucket, and the inside of the separation bucket is prevented from being blocked during the peak-shaving production. The nitrate slurry is returned to the inside of the mother liquor storage tank through the circulating pipe for storage. The inside of the inner sleeve bucket is used for separating or settling the product, and the separated mother liquor is returned to the mother liquor storage tank through the leakage hole and the return pipe. The remaining raw materials are dried to produce the product. The materials evaporated in the jacket are crystallized, and the crystallized materials are left in the crystallization chamber. When the remaining nitrate slurry needs to be further purified, it can be returned and circulated for heating. When the self-circulation is not needed, only the nitrate slurry valve of the return unit is opened, and the nitrate foot is ensured to be unblocked, so that the system normal operation is not affected by the large amount of white water entering during the nitrate foot flushing, and the product quality is not affected by the mechanical impurities. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 FIG. 1 is a structure schematic diagram of an evaporation chamber in the present application;
[0024] Figure 2 FIG. 2 is a structure schematic diagram of a nitrate slurry self-circulation system in the present application;
[0025] Figure 3 FIG. 3 is a structure schematic diagram of a separation device in the present application.
[0026] Marked in the figure: 1, mother liquor storage tank; 2, feed pipe; 3, circulating pump; 4, feeding pipe; 5, heat exchange pipe; 6, steam inlet; 7, cold water outlet; 8, evaporation chamber; 9, exhaust pipe; 10, jacket; 11, nitrate foot; 12, circulating chamber; 13, crystallization chamber; 14, white water pipe; 15, circulating pipe; 16, nitrate slurry pipe; 17, nitrate slurry pump; 18, discharge pipe; 19, first valve; 20, second circulating pipe; 21, second valve; 22, separation bucket; 23, backflow pipe; 24, rack; 25, electric lifting rod; 26, motor base; 27, motor; 28, inner sleeve bucket; 29, leakage hole; 30, rotating rod; 31, stirring blade; 32, scraper. DETAILED DESCRIPTION
[0027] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0028] EMBODIMENT
[0029] Referring to Figures 1-3 , the mother liquor storage tank 1 is provided, the front end of the mother liquor storage tank 1 is fixedly connected with the feed pipe 2, the top end of the feed pipe 2 is fixedly connected with the circulating pipe 15, the top end of the circulating pipe 15 is fixedly connected with the circulating pump 3, the top of the circulating pump 3 is fixedly connected with the feeding pipe 4, the surface of the feeding pipe 4 is mounted with the heat exchange pipe 5, the top end of the feeding pipe 4 is fixedly mounted with the evaporation chamber 8, the lower end of the evaporation chamber 8 is fixedly mounted with the nitrate foot 11, the surface of the nitrate foot 11 is sleeved with the jacket 10, the upper side end of the jacket 10 is fixedly connected with the circulating pipe 15, the lower side end of the jacket 10 is fixedly connected with the nitrate slurry pipe 16, the top end of the nitrate slurry pipe 16 is fixedly connected with the nitrate slurry pump 17, the top end of the nitrate slurry pump 17 is fixedly connected with the discharge pipe 18, the surface of the discharge pipe 18 is mounted with the first valve 19, the side end of the discharge pipe 18 is fixedly connected with the second circulating pipe 20, the surface of the second circulating pipe 20 is mounted with the second valve 21, the top end of the second circulating pipe 20 is fixedly connected with the mother liquor storage tank 1. The inside of the mother liquor storage tank 1 is used to store raw materials and subsequent circulating mother liquor, the raw materials can be sent to the inside of the evaporation chamber 8 for evaporation purification after heat exchange at the heat exchange pipe 5 through the circulating pump 3. The evaporated materials in the evaporation chamber 8 will be discharged from the nitrate foot 11 to the inside of the jacket 10, and crystallization is carried out in the inside of the jacket 10, and the remaining nitrate slurry after crystallization can be backflowed through the circulating pipe 15.
[0030] The nitrate slurry after multiple cycles can be sent to the nitrate slurry pump 17 through the nitrate slurry pipe 16 at the bottom of the jacket 10, and extracted by the nitrate slurry pump 17 to the inside of the separation barrel 22 through the discharge pipe 18 for separation. The liquid separated or settled is returned to the inside of the mother liquor storage tank 1 for recycling, and the remaining material is dried to obtain the product. During production, when peak-shaving production is encountered, the nitrate slurry self-circulation can be started. By closing the first valve 19 and opening the second valve 21, the circulating nitrate slurry is prevented from entering the inside of the separation barrel 22, avoiding the situation of blocking the inside of the separation barrel during peak-shaving production. The nitrate slurry is returned to the inside of the mother liquor storage tank 1 through the second circulation pipe 20 for storage. The nitrate slurry self-circulation process installs a pipe back to the original production unit and a control valve at the outlet of the original nitrate slurry pump, and adds a shut-off valve to the original nitrate slurry pump outlet pipe. When self-circulation is needed, the valve to the separation and settling barrel is closed, so that the pump slurry does not enter the process pipe after the settling barrel, ensuring that the pipe after the settling barrel is not blocked, reducing production failures, and when self-circulation is not needed, only the nitrate slurry valve back to the original unit is opened, ensuring that the nitrate slurry is unblocked, so that a large amount of white water is not introduced when flushing the nitrate slurry, which affects the normal operation of the system or produces mechanical impurities that affect product quality.
[0031] With reference to Figure 2 and Figure 3 , the top end of the discharge pipe 18 is provided with the separation barrel 22, the inside of the separation barrel 22 is provided with the inner sleeve barrel 28, the surface of the inner sleeve barrel 28 is provided with the leakage hole 29, the bottom of the separation barrel 22 is fixedly connected with the return pipe 23, and the top end of the return pipe 23 is fixedly connected with the mother liquor storage tank 1. The inside of the inner sleeve barrel 28 is used for separating or settling the product, and the separated mother liquor is returned to the mother liquor storage tank 1 through the leakage hole 29 and the return pipe 23. The remaining raw materials are dried to produce the product.
[0032] With reference to Figure 3 , the top of the separation barrel 22 is fixedly connected with the rack 24, the top of the rack 24 is fixedly installed with the electric lifting rod 25, and the lower end of the electric lifting rod 25 is height-connected with the motor table 26. When the electric lifting rod 25 is started, the motor table 26 can be moved up and down, and then the motor 27 is moved up and down.
[0033] With reference to Figure 3 , the side end of the motor table 26 is slidably connected with the rack 24, the bottom end of the motor table 26 is fixedly installed with the motor 27, and the lower end of the motor 27 is fixedly connected with the rotating rod 30. Starting the motor 27 can drive the rotating rod 30 to rotate.
[0034] With reference to Figure 3The side end of the rotating rod 30 is fixedly connected with the stirring blade 31, and the bottom end of the rotating rod 30 is fixedly connected with the scraper 32. When the rotating rod 30 rotates, the stirring blade 31 can be driven to rotate, and the slurry in the inner barrel 28 can be stirred. When the electric lifting rod 25 is started to drive the scraper 32 to move upward, the raw materials on the side wall of the inner barrel 28 can be scraped off, and the raw materials are convenient to take out.
[0035] With reference to Figure 2 The inside upper end of the jacket 10 is provided with a circulating chamber 12, the side end of the circulating chamber 12 is fixedly connected with a white water pipe 14, and the inside lower end of the jacket 10 is provided with a crystallization chamber 13. The materials evaporated in the jacket 10 will be crystallized, and the crystallized materials will be left in the crystallization chamber 13. When the remaining nitrocellulose slurry needs to be continuously purified, it can be circulated and heated by the circulating pipe 15. When the subsequent process is needed, it can be sent to the inside of the separation barrel 22 through the nitrocellulose slurry pipe 16 and the nitrocellulose slurry pump 17. The white water pipe 14 is used to add white water, which is used to dilute and flush the blocked crystalline body in the nitro foot 11 and the jacket 10, so as to avoid blocking the nitrocellulose slurry outlet.
[0036] With reference to Figure 2 The front end of the heat exchange pipe 5 is fixedly connected with the cold water outlet 7, and the rear end of the heat exchange pipe 5 is fixedly connected with the steam inlet 6. The circulating nitrocellulose slurry can be heated by heat exchange through the steam inlet 6 and the cold water outlet 7, and sent to the inside of the evaporation chamber 8.
[0037] With reference to Figure 1 The top of the evaporation chamber 8 is fixedly connected with the exhaust pipe 9. The exhaust pipe 9 is used to exhaust the gas during the purification and evaporation.
[0038] The implementation principle of the nitrate slurry self-circulation system embodiment of the present application is as follows: the evaporated material in the evaporation chamber 8 is discharged from the nitrate foot 11 to the inside of the jacket 10, crystallization is carried out in the inside of the jacket 10, and the remaining nitrate slurry after crystallization can be returned through the circulation pipe 15. The nitrate slurry after multiple circulations can be sent to the nitrate slurry pump 17 through the nitrate slurry pipe 16 at the bottom of the jacket 10, and is extracted by the nitrate slurry pump 17 to the inside of the separation barrel 22 through the discharge pipe 18 for separation. The liquid obtained by separation or sedimentation is returned to the inside of the mother liquor storage tank 1 for recycling, and the remaining material is dried to obtain the product. During production, when peak-shaving production is encountered, the nitrate slurry self-circulation can be started. By closing the first valve 19 and opening the second valve 21, the circulating nitrate slurry is prevented from being sent to the inside of the separation barrel 22, and the inside of the separation barrel 22 is prevented from being blocked during peak-shaving production. The nitrate slurry is returned to the inside of the mother liquor storage tank 1 through the second circulation pipe 20 for storage. The inside of the inner sleeve barrel 28 is used for separating or sedimenting the product, the separated mother liquor is returned to the mother liquor storage tank 1 through the leakage hole 29 and the return pipe 23. The remaining raw material is dried to produce the product. The material evaporated in the inside of the jacket 10 is crystallized, the crystallized material is left in the crystallization chamber 13, and the remaining nitrate slurry can be returned for circulation and heating through the circulation pipe 15 when further purification is needed. When subsequent processes are needed, the nitrate slurry can be sent to the inside of the separation barrel 22 through the nitrate slurry pipe 16 and the nitrate slurry pump 17. The white water pipe 14 is used for adding white water, diluting and flushing the blocked crystalline in the nitrate foot 11 and the jacket 10, and preventing the nitrate slurry outlet from being blocked.
[0039] The nitrate slurry self-circulation process installs a pipeline and a control valve back to the production unit at the outlet of the original nitrate slurry pump, adds a shut-off valve to the original nitrate slurry pump outlet pipeline, closes the valve to the separation barrel when self-circulation is needed, and prevents the pump slurry from entering the pipeline after the separation and sedimentation barrel, so as to prevent the pipeline after the sedimentation barrel from being blocked, reduce production failures, and ensure that the nitrate foot is unblocked, so that a large amount of white water is not introduced to affect the normal operation of the system or cause mechanical impurities to affect product quality. The device can improve the nitrate slurry self-circulation process, meet the nitrate slurry circulation needs of some regions in response to peak-shaving production, and avoid blocking of the device during circulation and excessively low system temperature.
[0040] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A self-circulation system of nitro slurry, comprising a mother liquor storage tank (1), characterized in that: The front end of the mother liquor storage tank (1) is fixedly connected with a feeding pipe (2), the top end of the feeding pipe (2) is fixedly connected with a circulating pipe (15), the top end of the circulating pipe (15) is fixedly connected with a circulating pump (3), the top of the circulating pump (3) is fixedly connected with a feeding pipe (4), the surface of the feeding pipe (4) is mounted with a heat exchange pipe (5), the top end of the feeding pipe (4) is fixedly mounted with an evaporation chamber (8), the lower end of the evaporation chamber (8) is fixedly mounted with a nitration foot (11), the surface of the nitration foot (11) is sleeved with a jacket (10), the upper end of the jacket (10) is fixedly connected with a circulating pipe (15), the lower end of the jacket (10) is fixedly connected with a nitration slurry pipe (16), the top end of the nitration slurry pipe (16) is fixedly connected with a nitration slurry pump (17), the top end of the nitration slurry pump (17) is fixedly connected with a discharge pipe (18), the surface of the discharge pipe (18) is mounted with a first valve (19), the side end of the discharge pipe (18) is fixedly connected with a second circulating pipe (20), the surface of the second circulating pipe (20) is mounted with a second valve (21), the top end of the second circulating pipe (20) is fixedly connected with a mother liquor storage tank (1).
2. The self-circulation system of nitro slurry according to claim 1, wherein: The top end of the discharge pipe (18) is mounted with a separation barrel (22), the inside of the separation barrel (22) is mounted with an inner sleeve barrel (28), the surface of the inner sleeve barrel (28) is provided with a leakage hole (29), the bottom of the separation barrel (22) is fixedly connected with a reflux pipe (23), the top end of the reflux pipe (23) is fixedly connected with a mother liquor storage tank (1).
3. The self-circulation system of nitro slurry according to claim 2, characterized in that: The top of the separation barrel (22) is fixedly connected with a rack (24), the top of the rack (24) is fixedly mounted with an electric lifting rod (25).
4. The self-circulating nitrate slurry system of claim 3, wherein: The side end of the motor table (26) is slidingly connected with a rack (24), the bottom of the motor table (26) is fixedly mounted with a motor (27), the lower end of the motor (27) is fixedly connected with a rotating rod (30).
5. The self-circulating nitrate slurry system of claim 4, wherein: The side end of the rotating rod (30) is fixedly connected with a stirring blade (31), the bottom end of the rotating rod (30) is fixedly connected with a scraper (32).
6. The self-circulating nitrate slurry system of claim 1, wherein: The inside upper end of the jacket (10) is provided with a circulating chamber (12), the side end of the circulating chamber (12) is fixedly connected with a white water pipe (14), the inside lower end of the jacket (10) is provided with a crystallization chamber (13).
7. The self-circulating nitrate slurry system of claim 1, wherein: The front end of the heat exchange pipe (5) is fixedly connected with a cold water outlet (7), the rear end of the heat exchange pipe (5) is fixedly connected with a steam inlet (6).
8. The self-circulating nitrate slurry system of claim 1, wherein: The top of the evaporation chamber (8) is fixedly connected with an exhaust pipe (9).