Tail gas treatment device for continuous leaching reaction kettle

Abstract

The utility model discloses a tail gas treatment device for a continuous leaching reaction kettle, which comprises a transfer tank for storing and transferring ore pulp raw materials; a steam leading-in pipe for supplying heat to the interior of the continuous leaching reaction kettle is arranged above the continuous leaching reaction kettle; the feeding pipe is arranged between the continuous leaching reaction kettle and the transfer tank; the flash tank is arranged at the rear end of the continuous leaching reaction kettle; the diluting tank is arranged on one side of the continuous leaching reaction kettle and is connected with the flash tank through a discharge pipe; the steam-water separator I is connected with the flash tank through a low-pressure exhaust pipe and is used for recycling low-pressure steam in the flash tank; and a steam-water separator II. The continuous leaching reaction kettle has the beneficial effects that through the split type tail gas treatment design, high-pressure steam and low-pressure steam in the continuous leaching reaction kettle can be subjected to targeted treatment, pressure reduction can be achieved, meanwhile, materials remaining in the steam can be recycled, the utilization rate of resources is remarkably increased, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting, in particular to a tail gas treatment device for a continuous leaching reactor. Background Technique

[0002] In the smelting process of non-ferrous metal raw materials such as tungsten, molybdenum or bismuth, high-temperature leaching is required to purify the target ore in the pulp. During the high-temperature leaching process, there is a large amount of steam in the reactor. When pressure is relieved and discharging materials, the steam will carry out some materials. If directly discharged, it will not only affect the surrounding environment, but also cause material loss. The traditional treatment method does not specifically deal with this problem, cannot meet the current essential environmental protection requirements, and also causes a certain degree of waste of resources. Content of the Utility Model

[0003] The purpose of the utility model is to provide a tail gas treatment device for a continuous leaching reactor to solve the technical problem that in the prior art, the treatment effect of steam discharge in the smelting process of non-ferrous metal raw materials such as tungsten, molybdenum or bismuth is insufficient, which often causes a certain degree of waste of resources and also affects the surrounding environment. Among the many technical solutions provided by the utility model, the preferred technical solution can respectively carry out targeted treatment on the high-pressure steam and low-pressure steam inside the continuous leaching reactor through a split-type tail gas treatment design. While achieving pressure reduction, it can recycle and process the materials remaining in the steam, significantly improving the utilization rate of resources and having strong practicability. For details, see the following description.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] The tail gas treatment device for a continuous leaching reactor provided by the utility model includes:

[0006] A transfer tank for storing and transferring pulp raw materials;

[0007] A continuous leaching reactor, with a steam inlet pipe for heating the reactor above it;

[0008] A feed pipe arranged between the continuous leaching reactor and the transfer tank;

[0009] A flash tank arranged at the end of the continuous leaching reactor;

[0010] A dilution tank arranged on one side of the continuous leaching reactor and connected to the flash tank through a discharge pipe;

[0011] A steam-water separator I connected to the flash tank through a low-pressure exhaust pipeline for recovering the low-pressure steam inside the flash tank;

[0012] The second steam-water separator is arranged above the dilution tank. The second steam-water separator is connected to the delivery fan through the second steam-water separation exhaust pipe and is connected to the absorption tower through the delivery fan.

[0013] The heat exchanger is arranged outside the first steam-water separator and is connected to the first steam-water separator through the first steam-water separation exhaust pipe.

[0014] The cooling tower is arranged outside the heat exchanger and is connected to the heat exchanger through the cooling water delivery pipe and the cooling water recovery pipe.

[0015] The delivery fan is connected to the second steam-water separator through the second steam-water separation exhaust pipe.

[0016] The absorption tower is arranged outside the cooling tower and is connected to the delivery fan through a pipe.

[0017] The first steam-water separator is connected to the flash tank through the low-pressure exhaust pipe.

[0018] Preferably, a buffer tank and a pre-flash tank are arranged between the flash tank and the continuous leaching reactor.

[0019] Preferably, a spray water recovery pipe and a cooling water recovery pipe connected to the absorption tower and the heat exchanger are respectively arranged at the feed end of the cooling tower, and a spray water delivery pipe and a cooling water delivery pipe connected to the absorption tower and the heat exchanger are respectively arranged at the discharge end of the cooling tower.

[0020] Preferably, a temperature detector is arranged inside the absorption tower for detecting the temperature state of the discharged flue gas.

[0021] Preferably, a pressure sensor is arranged inside the continuous leaching reactor for detecting the pressure state at the partition inside the continuous leaching reactor.

[0022] The beneficial effects are as follows:

[0023] Through the split-type tail gas treatment design, the high-pressure steam and low-pressure steam inside the continuous leaching reactor can be respectively treated specifically. While being able to achieve pressure reduction, the materials remaining in the steam can be recycled and processed, significantly improving the resource utilization rate and having strong practicability. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1is the three-dimensional structure view of the present utility model Figure I ;

[0026] Figure 2 is the three-dimensional structure view of the present utility model Figure II 。

[0027] The description of the reference numerals in the drawings is as follows:

[0028] 1. Pre-flash tank; 2. Flash tank; 3. Buffer tank; 4. Discharge pipe; 5. Dilution tank; 6. Low-pressure exhaust pipeline; 7. Second steam-water separation exhaust pipe; 8. Water tank; 9. Conveyor fan; 10. Absorption tower; 11. Spray water recovery pipeline; 12. Spray water delivery pipeline; 13. Cooling tower; 14. Cooling water recovery pipeline; 15. Cooling water delivery pipeline; 16. Heat exchanger; 17. First steam-water separation exhaust pipe; 18. First steam-water separator; 19. Condensate recovery pipeline; 20. Steam inlet pipe; 21. Feed pipe; 22. Transfer tank; 23. Transfer pump; 24. Second steam-water separator; 25. Continuous leaching reactor; 26. High-pressure exhaust pipe. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope protected by the present utility model.

[0030] See Figure 1 - Figure 2 As shown, the present utility model provides a tail gas treatment device for a continuous leaching reactor, including:

[0031] A transfer tank 22 for storing and transferring pulp raw materials, with a stirring structure inside, capable of fully stirring the pulp inside to facilitate the subsequent continuous leaching process;

[0032] A continuous leaching reactor 25, with a steam inlet pipe 20 for heating the reactor above the continuous leaching reactor 25. The steam inlet pipe 20 is used to provide steam from an external gas source to the continuous leaching reactor 25 for temperature adjustment, thereby controlling the temperature and pressure inside the device and facilitating the leaching reaction;

[0033] A feed pipe 21 is arranged between the continuous leaching reactor 25 and the transfer tank 22. The feed pipe 21 is used to feed the pulp material inside the transfer tank 22 into the continuous leaching reactor 25. A transfer pump 23 is arranged on the feed pipe 21 for driving the material to be transported and moved;

[0034] The flash evaporation tank 2 is arranged at the end of the continuous leaching reactor 25. When the materials inside the continuous leaching reactor 25 are exported to the flash evaporation tank 2, the final gas-solid separation treatment is carried out, and at the same time, the pressure reduction function is accompanied. During this process, the screened materials will be exported through the discharge pipe 4 for collection, while the air inside the flash evaporation tank 2 will be introduced into the first steam-water separator 18 through the low-pressure exhaust pipe 6 for further treatment;

[0035] The dilution tank 5 is arranged on one side of the continuous leaching reactor 25 and is connected to the flash evaporation tank 2 through the discharge pipe 4, and is used to collect the materials in the flash evaporation tank 2;

[0036] The first steam-water separator 18 is connected to the flash evaporation tank 2 through the low-pressure exhaust pipe 6, and is used to recover the low-pressure steam inside the flash evaporation tank 2 and re-introduce the condensed water into the dilution tank 5 for collection, while the separated gas will be exported to the heat exchanger 16. After being cooled by the heat exchanger 16, it is re-introduced into the dilution tank 5 to avoid material loss;

[0037] The second steam-water separator 24 is arranged above the dilution tank 5. The second steam-water separator 24 is connected to the delivery fan 9 through the second steam-water separation exhaust pipe 7, and is used to reduce the pressure of the steam exported from the inside of the dilution tank 5 to reduce the impact on the pipeline and subsequent equipment; The second steam-water separator 24 is directly arranged above the dilution tank 5 and is connected to the continuous leaching reactor 25 through the high-pressure exhaust pipe 26. The dilution tank 5 is used to store the recovered materials in the treated steam to avoid waste of raw materials;

[0038] The heat exchanger 16 is arranged outside the first steam-water separator 18 and is connected to the heat exchanger 16 through the first steam-water separation exhaust pipe 17. The heat exchanger 16 is used to cool the steam exported from the inside of the first steam-water separator 18, and at the same time, further recover the condensed water and the carried-out materials in the steam;

[0039] The cooling tower 13 is arranged outside the heat exchanger 16 and is connected to the heat exchanger 16 through the cooling water delivery pipe 15 and the cooling water recovery pipe 14. The cooling tower 13 can cool the circulating water inside the heat exchanger 16 to ensure the normal operation of the heat exchanger 16;

[0040] The delivery fan 9 is connected to the second steam-water separator 24 through the second steam-water separation exhaust pipe 7. The delivery fan 9 pressurizes and transports the gas processed by the steam-water separator, so that the gas can smoothly enter the absorption tower 10 for cooling spray, and at the same time, ensure that the processed gas will not pollute the plant;

[0041] The absorption tower 10 is arranged outside the cooling tower 13 and is connected to the delivery fan 9 through a pipeline. When the gas exported from the inside of the steam-water separator enters the inside of the absorption tower 10, the cooling water can be used to further cool down the gas, so as to achieve the purpose of eliminating white, reduce the visual impact during gas emission, and at the same time further recover the condensed water and the carried-out materials in the steam;

[0042] The first steam-water separator 18 is connected to the flash tank 2 through the low-pressure exhaust pipeline 6. The first steam-water separator 18 can separate the gas-liquid mixture inside the flash tank 2, so as to recover most of the condensed water and materials;

[0043] During use, the materials stored inside the transfer tank 22 will be fully stirred, pressurized by the delivery pump 23 and then introduced into the continuous leaching reactor 25 for leaching reaction. During this process, the external steam is introduced into each partition inside the continuous leaching reactor 25 through the steam inlet pipe 20, so as to adjust the temperature. Since the temperature of the steam inside the continuous leaching reactor 25 is relatively high, the inside of the reactor always maintains a positive pressure state. In order to adjust the pressure state inside the continuous leaching reactor 25, when the pressure of the high-temperature and high-pressure steam generated inside is too high, it will be directly introduced into the first steam-water separator 18 above the dilution tank 5 through the high-pressure exhaust pipe 26 in time. Since this part is high-pressure steam, it is necessary to use the first steam-water separator 18 for pressure reduction treatment. The gas with a lower temperature will be re-introduced into the dilution tank 5 for storage through the condensed water recovery pipeline 19, while the gas with a higher temperature will enter the heat exchanger 16 for cooling, and the liquid after cooling treatment will be re-introduced into the dilution tank 5 for storage;

[0044] The materials after being processed by the continuous leaching reactor 25 will be introduced into the buffer tank 3 for preliminary pressure reduction, and then introduced into the pre-flash tank 21 and the flash tank 2 for gas-liquid separation, so as to extract the target pulp and export it from the flash tank 2 through the discharge pipe 4. The steam inside the flash tank 2 will be introduced into the first steam-water separator 18 through the low-pressure exhaust pipeline 6 for treatment, and finally re-introduced into the dilution tank 5. At this time, the processed steam inside the dilution tank 5 is subjected to gas-liquid separation, and finally transported to the second steam-water separator 24 for secondary treatment, and as much as possible of the part containing materials in the gas is collected into the dilution tank 5, so as to improve the utilization rate of raw materials. Finally, the processed gas will be exported from the top of the second steam-water separator 24, and finally introduced into the absorption tower 10 under the action of the delivery fan 9. After being subjected to the white elimination treatment by cooling water spraying, the emission is finally realized. At the same time, the absorption tower 10 can also recover the water and some of the carried-out materials in the steam, so as to further improve the utilization rate of raw materials.

[0045] In another embodiment, a buffer tank 3 and a pre-flash tank 21 are arranged between the flash tank 2 and the continuous leaching reactor 25. The buffer tank 3 buffers the gas exported from the continuous leaching reactor 25, and the pre-flash tank 21 performs preliminary pressure reduction on the buffered gas, preventing materials from moving together with the steam in the flash tank 2 due to excessive gas pressure, causing material leakage, and also playing a protective role for the flash tank 2 and extending the service life of the equipment.

[0046] In another embodiment, a spray water recovery pipeline 11 and a cooling water recovery pipeline 14 connected to the absorption tower 10 and the heat exchanger 16 are respectively arranged at the feed end of the cooling tower 13, and a spray water delivery pipeline 12 and a cooling water delivery pipeline 15 connected to the absorption tower 10 and the heat exchanger 16 are respectively arranged at the discharge end of the cooling tower 13. By designing the above pipelines, the cooling tower 13 can provide cooling water to the interiors of the absorption tower 10 and the heat exchanger 16 simultaneously during use, improving the water flow circulation efficiency and accelerating the cooling speed.

[0047] In another embodiment, a temperature detector is arranged inside the absorption tower 10 to detect the temperature state of the discharged flue gas. The temperature detector is used to detect the temperature inside the absorption tower 10, so as to be able to adjust the spray water volume accordingly and thus ensure the effect of flue gas treatment.

[0048] In another embodiment, a pressure sensor is arranged inside the continuous leaching reactor 25 to detect the pressure state at the partition inside the continuous leaching reactor 25. The pressure sensor can detect the pressure state inside the continuous leaching reactor 25, thereby controlling the valve body on the high-pressure exhaust pipe 26 in a linkage manner and controlling its opening and closing to achieve the purpose of precise pressure control.

[0049] The above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A continuous leaching reactor tail gas treatment device, characterized in that: include: A transfer tank (22) is used for storing and transferring slurry raw materials; A continuous leaching reaction kettle (25), wherein a steam introduction pipe (20) for supplying heat to the kettle is provided above the continuous leaching reaction kettle (25); A feed pipe (21) is arranged between the continuous leaching reactor (25) and the transfer tank (22); A flash tank (2) is arranged at the end of the continuous leaching reactor (25); A dilution tank (5) is arranged on one side of the continuous leaching reactor (25) and is connected to the flash tank (2) via a discharge pipe (4); A steam-water separator (18) is connected to the flash tank (2) via a low-pressure exhaust pipe (6) and is used to recover the low-pressure steam inside the flash tank (2); A second steam-water separator (24) is arranged above the dilution tank (5); the second steam-water separator (24) is connected to the conveying fan (9) through a second steam-water separation exhaust pipe (7), and is connected to the absorption tower (10) through the conveying fan (9); The heat exchanger (16) is arranged outside the steam-water separator (18) and is connected to the steam-water separator (18) via the steam-water separation exhaust pipe (17); A cooling tower (13) is arranged outside the heat exchanger (16) and is connected to the heat exchanger (16) via a cooling water recovery pipe (14) and a cooling water delivery pipe (15); A conveying fan (9) is connected to the second steam-water separator (24) via the second steam-water separation exhaust pipe (7); An absorption tower (10) is arranged outside the cooling tower (13) and is connected to the conveying fan (9) via a pipeline; The steam-water separator (18) is connected to the flash tank (2) via a low-pressure exhaust pipe (6).

2. The continuous leaching reactor tail gas treatment device according to claim 1 is characterized in that: A buffer tank (3) and a pre-flash tank (1) are provided between the flash tank (2) and the continuous leaching reactor (25).

3. The continuous leaching reactor tail gas treatment device according to claim 1 is characterized in that: A spray water recovery pipe (11) and a cooling water recovery pipe (14) connected to the absorption tower (10) and the heat exchanger (16) are respectively provided at the feed end of the cooling tower (13), and a spray water delivery pipe (12) and a cooling water delivery pipe (15) connected to the absorption tower (10) and the heat exchanger (16) are respectively provided at the discharge end of the cooling tower (13).

4. The continuous leaching reactor tail gas treatment device according to claim 1 is characterized in that: A temperature detector is provided inside the absorption tower (10) for detecting the temperature state of the exhaust flue gas.

5. The continuous leaching reactor tail gas treatment device according to claim 1 is characterized in that: A pressure sensor is arranged inside the continuous leaching reaction kettle (25) for detecting the pressure state of a partition inside the continuous leaching reaction kettle (25).

Images