Efficient environment-friendly leaching and hot melting device in sodium sulfide production
By designing an efficient and environmentally friendly leaching hot melt device including air storage cavity, filler layer and cooling chamber, the explosion problem caused by excessive heat concentration during hot melting in the production of sulfide alkali is solved, and safety, labor saving, simplicity, Efficient production results.
Patent Information
- Application Number
- CN202421268641.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In the production of sulfide alkali, the heat is too concentrated during the hot melting process, which can easily lead to explosions, resulting in waste of materials, injury to personnel and environmental pollution.
An efficient and environmentally friendly leaching hot melt device is designed, including a cylinder cover, a hoist, a feeding plate, a leaching hot melt tank, a feeding machine, a semi-immersed screw discharger, a slag conveyor and an alkali mist absorber , through structures such as the gas storage cavity, filler layer and cooling chamber, avoid excessive heat concentration and prevent explosion.
It effectively prevents explosions during hot melting, reduces accident risks, saves costs, reduces the emission of harmful gases, and achieves a safe, labor-saving, simple and efficient production process.
Smart Images
Figure CN222489983U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sodium sulfide production, and is a high-efficiency, environment-friendly leaching and hot-melting device in sodium sulfide production. Background Art
[0002] The production process of sodium sulfide is to mix the raw nitrate and raw coal in a certain proportion, and use an automatic feeder to send the mixture to a reduction furnace for reaction. After the reaction is completed, the reaction product melt (sodium sulfide) is discharged from the reduction furnace and sent to a thermal device for leaching and melting, and finally a concentrated alkali solution is obtained.
[0003] At present, in the process of crude alkali reaction discharging of sodium sulfide produced in China, most manufacturers use the short converter (also known as intermittent reduction furnace). The charging and discharging of the short converter are intermittent processes, generally one charge per 2 hours, so the hot melting process after discharging is also intermittent. After discharging from the short converter, the crude alkali is broken into irregular pieces of about 150mm by a scraper (commonly known as a mace) and enters the leaching tank for hot melting.
[0004] However, each time the process is carried out, the billets are relatively concentrated and need to be dissolved in a short time. This will cause the heat released during the dissolution process to be too concentrated. On the other hand, the high-temperature heat released by the billets is not evenly exchanged with the water in the leaching tank, which will cause the steam and water to evaporate together. The accumulated heat is prone to produce a violent explosion, and a large amount of alkali liquid will overflow with the explosion. The alkali liquid and the undissolved billets will scald the on-site staff, pollute the environment, and cause a waste of raw materials. In serious cases, it may even cause equipment damage and casualties.
[0005] Therefore, developing a fast and safe leaching device is a difficult problem that has been expected to be solved in the alkali sulfide hot melt process. Summary of the invention
[0006] The utility model provides a high-efficiency and environmentally friendly leaching hot-melt device in the production of alkali sulfide, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the accumulated heat during hot melting in the existing alkali sulfide production is prone to explosion, thereby causing material waste and personal injury.
[0007] The technical scheme of the utility model is realized by the following measures: a high-efficiency and environmentally friendly leaching hot-melt device in the production of alkali sulfide, comprising a cylinder cover, a winch, a lifting plate, a leaching hot-melt tank, a scraper, a semi-immersed spiral feeder, a slag conveyor and an alkali mist absorption fan, a gas storage cavity is arranged at the upper part of the leaching hot-melt tank, an exhaust port and a feeder port are arranged at the top of the gas storage cavity, a cylinder cover is arranged at the exhaust port, a packing layer is arranged at the upper part of the cylinder cover, a cooling chamber is arranged at the top of the packing layer, an exhaust pipeline is fixedly connected between the top outlet of the cooling chamber and the alkali mist absorption fan, and the gas storage cavity is provided with a gas storage cavity. A lifting plate and a scraper are provided at the discharge port at the top of the cavity, the wire rope of the winch is hinged to one end of the lifting plate, the scraper is in contact with the other end of the lifting plate, a semi-immersed spiral discharger is provided in the leaching hot melt tank, a discharge port at the top of the gas storage cavity and the semi-immersed spiral discharger are fixedly connected with a discharge pipeline, a plurality of spreading ports are provided on the bottom surface of the discharge pipeline corresponding to the feeding end of the semi-immersed spiral discharger, an overflow port is provided in the middle of the leaching hot melt tank, a slag discharge port is provided at the bottom of the leaching hot melt tank, a slag lifting conveyor is provided at the slag discharge port, and the overflow port is fixedly connected with an overflow pipeline.
[0008] The following are further optimizations and / or improvements to the above utility model technical solution:
[0009] One end of the lifting plate is provided with a plurality of rope holes, and the steel wire rope of the hoist passes through the rope holes at one end of the lifting plate to lift one end of the lifting plate.
[0010] The stripping rod of the stripping machine is provided with a plurality of stripping pieces, and the plurality of stripping pieces of the stripping machine are in contact with the other end of the lifting plate.
[0011] The above-mentioned leaching hot melt tank is provided with a stirrer.
[0012] The above also includes a black ash bucket and a small rail car. The small rail car is provided with a black ash bucket, and the black ash bucket can be inverted at one end of the lifting plate.
[0013] Ceramic corrugated packing is arranged in the packing layer.
[0014] The utility model has a reasonable and compact structure and is easy to use. It avoids the rapid accumulation of gas when the blank is hot-melted, prevents the violent explosion caused by the co-evaporation of steam and water, reduces the occurrence of accidents, saves costs, and reduces the emission of harmful gases. It is safe, labor-saving, simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.
[0016] Attached Figure 2 It is a side view schematic diagram of the scraper in the utility model.
[0017] Attached Figure 1The codes are as follows: 1 for the cylinder cover, 2 for the winch, 3 for the lifting plate, 4 for the leaching hot melt tank, 5 for the scraper, 6 for the semi-immersed spiral feeder, 7 for the slag conveyor, 8 for the alkali mist absorption fan, 9 for the cooling chamber, 10 for the exhaust pipeline, 11 for the overflow pipeline, 12 for the agitator, 13 for the black ash hopper, 14 for the packing layer, 15 for the wire rope, 16 for the feed pipeline, 17 for the spreading port, and 18 for the gas storage cavity. DETAILED DESCRIPTION
[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.
[0019] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.
[0020] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.
[0021] The present invention is further described below in conjunction with the embodiments and drawings:
[0022] Embodiment 1: As attached Figure 1 As shown, the high-efficiency and environmentally friendly leaching hot-melt device in the production of alkali sulfide includes a cylinder cover 1, a hoist 2, a lifting plate 3, a leaching hot-melt tank 4, a scraper 5, a semi-immersed spiral feeder 6, a slag conveyor 7 and an alkali mist absorption fan 8. The leaching hot-melt tank 4 is provided with an air storage cavity 18 at the upper part, and an exhaust port and a feed port are respectively provided at the top of the air storage cavity 18. The cylinder cover 1 is provided at the exhaust port, and a packing layer 14 is provided at the upper part of the cylinder cover 1. A cooling chamber 9 is provided at the upper part of the packing layer 14. An exhaust pipeline 10 is fixedly connected between the top outlet of the cooling chamber 9 and the alkali mist absorption fan 8. The feed port at the top of the air storage cavity 18 is provided with a gas storage cavity 18. A lifting plate 3 and a scraper 5 are provided, the steel wire rope 15 of the winch 2 is hinged to one end of the lifting plate 3, the scraper 5 is in contact with the other end of the lifting plate 3, a semi-immersed screw feeder 6 is provided in the leaching hot melt tank 4, a feeding pipeline 16 is fixedly connected between the feeding port at the top of the gas storage cavity 18 and the semi-immersed screw feeder 6, a plurality of spreading ports 17 are provided on the bottom surface of the feeding pipeline 16 corresponding to the feeding end of the semi-immersed screw feeder 6, an overflow port is provided in the middle of the leaching hot melt tank 4, a slag discharge port is provided at the bottom of the leaching hot melt tank 4, a slag conveyor 7 is provided at the slag discharge port, and an overflow pipeline 11 is fixedly connected to the overflow port.
[0023] The utility model has a reasonable and compact structure and is easy to use. The scraper 5, the lifting plate 3 and the semi-immersed spiral feeder 6 are used in combination to uniformly drop the billet onto the semi-immersed spiral feeder 6. At the same time, the height and volume of the leaching hot melt tank 4 in the original process are increased, so that a larger gas storage cavity 18 capable of temporarily storing gas is formed on the upper part of the leaching hot melt tank 4, thereby avoiding the rapid accumulation of hydrogen sulfide gas generated in the hot melting of the billet, preventing the violent explosion caused by the co-evaporation of steam and water, and reducing the occurrence of accidents. The alkaline mist generated by the hot melting is condensed through the packing layer 14 and the cooling chamber 9 and then reused, which not only saves costs, but also reduces the emission of harmful gases, thereby achieving environmental protection, and has the characteristics of safety, labor saving, simplicity and high efficiency.
[0024] The semi-submerged screw feeder 6 is arranged in the middle and lower part of the leaching hot melt tank 4, and the feeding port of the semi-submerged screw feeder 6 is opposite to the feeding port at the top of the gas storage cavity 18. The scraper 5 crushes the billet on the lifting plate 3 and drops it into the feeding port of the semi-submerged screw feeder 6 through the feeding port at the top of the gas storage cavity 18, and then slowly immerses it into the liquid in the leaching hot melt tank 4 through the semi-submerged screw feeder 6.
[0025] According to actual needs, the above-mentioned high-efficiency and environmentally friendly leaching and hot-melting device in the production of sodium sulfide can be further optimized and / or improved:
[0026] Embodiment 2: It is different from Embodiment 1 in that: Figure 1 As shown, a plurality of rope holes are provided at one end of the lifting plate 3 , and the steel wire rope 15 of the hoist 2 passes through the rope holes at one end of the lifting plate 3 to lift one end of the lifting plate 3 .
[0027] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 , 2 As shown, a plurality of groups of stripping pieces are arranged on the stripping rod of the stripping machine 5 , and the plurality of groups of stripping pieces of the stripping machine 5 are in contact with the other end of the lifting plate 3 .
[0028] As needed, after the crude alkali is poured onto the lifting plate 3, the winch 2 lifts one end of the lifting plate 3 through the wire rope 15, so that the raw material on one end of the lifted lifting plate 3 slowly slides down, and the crude alkali raw material at the bottom is broken by the action of multiple groups of scraping pieces of the scraper 5 and falls into the discharge pipeline 16, and then is sent to the alkali solution in the leaching hot melt tank 4 for hot melting through the semi-immersed spiral discharger 6.
[0029] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1 As shown, a stirrer 12 is provided in the leaching hot melt tank 4 .
[0030] As needed, the stirring shaft of the stirrer 12 passes through the gas storage cavity 18, and the motor of the stirrer 12 is located on the top of the gas storage cavity 18. During the blanking process, sodium sulfide reacts with water to release heat and a small amount of hydrogen sulfide gas. The heat and gas are removed in time through the rotation of the stirrer 12 to prevent excessive concentration of heat and the occurrence of implosion.
[0031] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 As shown, it also includes a black ash hopper 13 and a small rail car. The small rail car is provided with a black ash hopper 13, and the black ash hopper 13 can be inverted on one end of the lifting plate 3.
[0032] According to needs, after the short converter is discharged, the crude alkali is poured into the black ash hopper 13 of the small rail car and cooled, and then the material in the black ash hopper 13 is turned upside down on the lifting plate 3. The winch 2 lifts the lifting plate 3, and the material is sent to the semi-immersed spiral discharger 6 through the discharge pipeline 16 under the action of multiple groups of scraping pieces of the scraper 5.
[0033] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 As shown, ceramic corrugated packing is arranged in the packing layer 14 .
[0034] In the utility model, the ceramic corrugated packing is a commonly used orifice plate corrugated packing, which has the characteristics of light weight, large flow rate, high specific surface area, etc. Its main material is aluminum silicate acid-resistant and chemical-resistant ceramic material, with a temperature resistance of up to 1300°C and a use temperature as low as -1000°C. It can resist strong acid gas and alkaline liquid. The use of ceramic corrugated packing helps to extend the service life of the packing.
[0035] As required, the pipelines and equipment of the efficient and environmentally friendly leaching hot-melt device in the production of sodium sulfide can also be equipped with conventional valves, thermometers and pressure gauges known in the art according to production needs.
[0036] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.
[0037] The use process of the embodiment of the utility model is as follows:
[0038] First, after the short converter (also known as the intermittent reduction furnace) discharges the material, the billet (crude alkali) is discharged into the black ash hopper 13 on the small rail car for natural cooling to about 700 degrees. The black ash hopper 13 is inverted on the lifting plate 3, and the hoist 2 is used to lift one end (top) of the lifting plate 3, and the billet slides down along the lifting plate 3 to the other end (bottom) of the lifting plate 3;
[0039] Next, the scraper 5 uses multiple groups of scraper blades to scrape the blanks at the bottom of the lifting plate 3 into pieces (about 150mm irregular pieces), and sends them to the semi-immersed screw feeder 6 through the feeding port 17 in the feeding pipeline 16. The semi-immersed screw feeder 6 slowly sends it into the liquid in the leaching hot melting tank 4 for hot melting;
[0040] Then, as the stirring starts, the heat and alkali mist generated during the hot melting process slowly escape into the gas storage cavity 18, and the alkali mist with small droplets enters the cylinder cover 1 from the exhaust port. After the small droplets are removed by the packing layer 14 provided with ceramic corrugated packing, the alkali mist condenses in the cooling chamber 9, and the condensed liquid phase falls into the packing layer 14 and returns to the leaching hot melting tank 4 for reuse, and the gas phase is discharged through the exhaust pipeline 10 under the action of the alkali mist absorption fan 8;
[0041] Finally, after the hot melt is extracted in the leaching hot melt tank 4, the obtained alkali solution is discharged to the downstream process through the drainage pipeline 11, and the mud residues such as insoluble matter and residual carbon are sent to the slag conveyor 7 from the slag outlet to the downstream process for treatment.
Claims
1. A highly efficient and environmentally friendly leaching hot melt device in the production of sodium sulfide, characterized in that It includes a cylinder cover, a hoist, a lifting plate, an leaching hot melt tank, a scraper, a semi-immersed spiral feeder, a slag conveyor and an alkali mist absorption fan. An air storage cavity is arranged at the upper part of the leaching hot melt tank, an exhaust port and a feed port are arranged at the top of the air storage cavity, a cylinder cover is arranged at the exhaust port, a packing layer is arranged at the upper part of the cylinder cover, a cooling chamber is arranged at the top of the packing layer, an exhaust pipeline is fixedly connected between the top outlet of the cooling chamber and the alkali mist absorption fan, a lifting plate and a scraper are arranged at the feed port on the top of the air storage cavity, and the lifting plate and the scraper are arranged at the feed port on the top of the air storage cavity. The steel wire rope of the winch is hinged to one end of the lifting plate, and the scraper is in contact with the other end of the lifting plate. A semi-immersed spiral feeder is arranged in the leaching hot melt tank, and a feeding pipeline is fixedly connected between the feeding port on the top of the gas storage cavity and the semi-immersed spiral feeder. A plurality of spreading ports are arranged on the bottom of the feeding pipeline corresponding to the feeding end of the semi-immersed spiral feeder. An overflow port is arranged in the middle of the leaching hot melt tank, a slag discharge port is arranged at the bottom of the leaching hot melt tank, a slag lifting conveyor is arranged at the slag discharge port, and the overflow port is fixedly connected with an overflow pipeline.
2. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 1 is characterized in that One end of the lifting plate is provided with a plurality of rope holes, and the steel wire rope of the hoist passes through the rope holes at one end of the lifting plate to lift one end of the lifting plate.
3. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 2 is characterized in that A plurality of groups of stripping pieces are arranged on the stripping rod of the stripping machine, and the plurality of groups of stripping pieces of the stripping machine are in contact with the other end of the lifting plate.
4. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 1, 2 or 3, characterized in that A stirrer is arranged in the leaching hot melt tank.
5. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 1, 2 or 3, characterized in that It also includes a black ash hopper and a small rail car. The small rail car is provided with a black ash hopper, and the black ash hopper can be inverted at one end of a lifting plate.
6. The high-efficiency and environmentally friendly leaching and hot-melting device in the production of sodium sulfide according to claim 4 is characterized in that It also includes a black ash hopper and a small rail car. The small rail car is provided with a black ash hopper, and the black ash hopper can be inverted at one end of a lifting plate.
7. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 1, 2, 3 or 6, characterized in that Ceramic corrugated packing is arranged in the packing layer.
8. The high-efficiency and environmentally friendly leaching hot-melt device in the production of sodium sulfide according to claim 4, characterized in that Ceramic corrugated packing is arranged in the packing layer.
9. The high-efficiency and environmentally friendly leaching and hot-melting device in the production of sodium sulfide according to claim 5, characterized in that Ceramic corrugated packing is arranged in the packing layer.