High-salt wastewater miscellaneous salt roller drying device

Abstract

The utility model discloses a high salt wastewater miscellaneous salt cylinder drying device, it includes drying machine main part, low pressure steam aeration pipeline and process gas pipeline intercommunication, and steam aeration disc subassembly includes the air intake manifold, and a plurality of aeration branch pipes that communicate with the air intake manifold, each aeration branch pipe is alternately arranged in turn along the both sides of air intake manifold, and the bottom of aeration branch pipe is provided with the aeration hole that sets down to the bottom of aeration branch pipe, air intake manifold and process gas pipeline intercommunication. Advantage: aeration branch pipe arrangement mode changes to equal interval alternate arrangement, so can be sufficient to disturb the action to the bottom material liquid, reduces material liquid deposition. After adopting steam aeration and adjusting aeration mode, drying machine material liquid temperature is greater than 75 DEG C, namely has improved drying machine bottom material quantity, reduced drying machine bottom material crystallization's abnormal situation because of temperature reduction, also has saved the work load of manual cleaning drying machine bottom crystalline material, reduced the safety risk of personnel cleaning material.

Description

Technical Field

[0001] This utility model relates to the technical field of high-salt wastewater treatment equipment, and in particular to a high-salt wastewater mixed salt drum drying device. Background Technology

[0002] Currently, the equipment used for evaporation and drying of high-salinity wastewater on-site is a single-drum dryer, model DR-48203, whose structural diagram is shown below. Figure 1 As shown, high-salinity wastewater, after preliminary treatment, is pumped into the feed trough at the bottom of the single-drum dryer via a feed pump through the drum dryer's feed pipe. The liquid in the trough flows back to the previous stage through the bottom return port to ensure continuous circulation of the concentrated brine and prevent crystallization. Simultaneously, an aeration pipe is installed at the bottom of the trough, continuously supplying factory air for aeration, ensuring the brine in the trough remains in a flowing state. Hot steam at 0.5 MPa is continuously introduced into the single-drum dryer to heat the brine film on the drum surface. After the water evaporates, the material is scraped off the drum surface by scrapers inside the single-drum dryer and conveyed by a screw conveyor to a belt conveyor for discharge to the next process. The steam condensate generated during drum drying is discharged through a rotary joint.

[0003] In the above process, when the rotary drum dryer uses factory air aeration (at ambient temperature of 30℃), the low temperature of the factory air affects the temperature of the liquid material in the dryer. During winter operation, the measured liquid temperature is consistently below 70℃, and the factory air aeration cannot achieve the set effect. As the temperature decreases, the crystallization of saturated material at the bottom worsens, affecting the evaporation rate of the rotary drum dryer. Because the factory air aeration affects the liquid temperature and causes severe crystallization at the bottom, it can also clog the aeration discs. Manual cleaning of the bottom accumulation is required during each cycle of replacement and cleaning to ensure the normal operation of the rotary drum dryer, resulting in high labor intensity and impacting normal operation.

[0004] In addition, the current aeration branch pipes are arranged in pairs and aligned, with the aeration holes facing upwards. This results in the material below the aeration branch pipes accumulating at the bottom due to the lack of aeration to disturb the liquid. Utility Model Content

[0005] The purpose of this invention is to provide a high-salt wastewater mixed salt drum dryer that can effectively reduce the amount of crystallization to ensure operating efficiency.

[0006] This utility model is implemented by the following technical solution: a high-salt wastewater mixed salt drum dryer, which includes a dryer body, a low-pressure steam aeration pipeline, and a steam aeration disc assembly placed in the material tank of the dryer body; the low-pressure steam aeration pipeline is connected to the process gas pipeline, and a regulating valve is installed on the low-pressure steam aeration pipeline; the steam aeration disc assembly includes an air inlet main pipe and a plurality of aeration branch pipes connected to the air inlet main pipe, each of the aeration branch pipes being arranged alternately along both sides of the air inlet main pipe, and the bottom of each aeration branch pipe having a downward-facing aeration hole; the air inlet main pipe is connected to the process gas pipeline.

[0007] Furthermore, the bottom of the feed trough of the dryer body is a concave arc-shaped structure, and the aeration branch pipe is a conical structure.

[0008] Furthermore, the diameters of the aeration holes on each aeration branch pipe, from the inside out, are 19.05 mm, 12.7 mm, and 9.525 mm, respectively.

[0009] The advantages of this invention are as follows: Steam is introduced from the hot steam inlet of the dryer body to the main inlet pipe through a low-pressure steam aeration pipeline, and then aerated into the brine in the feed tank through the aeration holes on each aeration branch pipe; due to the high steam temperature, the temperature of the material at the bottom of the feed tank that has already crystallized rises as steam is added, and the aeration dissolves the crystals at high temperatures, which reduces the adverse factors of increased steam consumption and reduced operating load of the mixed salt system due to the crystallization of the bottom material in the dryer body.

[0010] The aeration branch pipes were changed to an alternating arrangement with equal spacing, which effectively agitates the liquid at the bottom, reducing sedimentation. After adopting steam aeration and adjusting the aeration method, the liquid temperature in the dryer exceeded 75℃, thus improving the amount of material accumulating at the bottom of the dryer, reducing the abnormal crystallization caused by temperature drops, and saving the manual labor required to clean the crystallized material at the bottom of the dryer, while also reducing the safety risks associated with personnel cleaning accumulated material. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the existing single-drum dryer described in the background section.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of the steam aeration disc assembly described in this utility model.

[0015] Figure 4 for Figure 3 A-direction view.

[0016] The components in the attached diagram are labeled as follows: Dryer body 1, Low-pressure steam aeration pipeline 2, Process gas pipeline 3, Regulating valve 4, Steam aeration disc assembly 5, Main air inlet pipe 5.1, Aeration branch pipe 5.2, Aeration hole 5.21. Detailed Implementation

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

[0018] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figures 2 to 4 As shown, this embodiment provides a high-salt wastewater mixed salt drum dryer, which includes a dryer body 1, a low-pressure steam aeration pipeline 2, and a steam aeration disc assembly 5 placed in the material tank of the dryer body 1.

[0020] The low-pressure steam aeration pipeline 2 is connected to the process gas pipeline 3, and a regulating valve 4 is installed on the low-pressure steam aeration pipeline 2; the steam aeration disc assembly 5 includes an air inlet main pipe 5.1 and several aeration branch pipes 5.2 connected to the air inlet main pipe 5.1. Each aeration branch pipe 5.2 is arranged alternately along both sides of the air inlet main pipe 5.1, and the bottom of the aeration branch pipe 5.2 has a downward-facing aeration hole 5.21; the air inlet main pipe 5.1 is connected to the process gas pipeline 3; in the summer when the ambient temperature is high, steam can be supplied to the steam aeration disc assembly 5 through the process gas pipeline 3, which helps to reduce the amount of steam used; while in the low-temperature environment, the regulating valve 4 switches to supply steam through the low-pressure steam aeration pipeline 2 to avoid crystallization at the bottom of the trough.

[0021] Steam is introduced from the hot steam inlet of the dryer body 1 through the low-pressure steam aeration pipeline 2 to the main air inlet pipe 5.1, and then aerated into the brine in the feed tank through the aeration holes 5.21 on each aeration branch pipe 5.2.

[0022] Steam aeration is used. Due to the high temperature of the steam, the temperature of the material at the bottom of the tank that has already crystallized rises as the steam is added. As the solubility of the crystals changes, they dissolve during aeration at high temperatures, which reduces the adverse effects of the crystallization of the bottom material on the operation load of the mixed salt system and the increase in steam consumption caused by the crystallization of the bottom material in the dryer body 1.

[0023] In this embodiment, the aeration branch pipes 5.2 are arranged alternately at equal intervals, which can fully agitate the bottom liquid and reduce liquid sedimentation. After adopting steam aeration and adjusting the aeration method, the liquid temperature in the dryer is greater than 75°C, which improves the amount of material accumulation at the bottom of the dryer, reduces the abnormal situation of material crystallization at the bottom of the dryer due to temperature drop, and also saves the workload of manually cleaning the crystallized material at the bottom of the dryer, reducing the safety risks of personnel cleaning accumulated material.

[0024] The bottom of the feed trough of the dryer body 1 is a concave arc-shaped structure, and the aeration branch pipe 5.2 is a conical structure. The diameters of the aeration holes 5.21 on each aeration branch pipe 5.2 from the inside to the outside are 19.05 mm (6 points), 12.7 mm (4 points), and 9.525 mm (3 points). The reason why the aeration branch pipe 5.2 is designed as a conical structure and the diameter of the aeration holes 5.21 arranged from the main air inlet pipe 5.1 to the end of the aeration branch pipe 5.2 is smaller is that the material in the feed trough will concentrate towards the middle, and the required aeration is mainly concentrated in the middle of the feed trough, while the bottom edge of the feed trough only needs a relatively small amount of aeration. In this way, not only can the aeration requirements be met, but it is also beneficial to reduce the amount of steam used and reduce production costs.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-salt wastewater miscellaneous salt drum drying device including a dryer main body, characterized by, It also includes a low-pressure steam aeration pipeline and a steam aeration disc assembly placed in the material trough of the dryer body; The low-pressure steam aeration pipeline is connected to the process gas pipeline, and a regulating valve is installed on the low-pressure steam aeration pipeline. The steam aeration disc assembly includes an air inlet main pipe and several aeration branch pipes connected to the air inlet main pipe. Each of the aeration branch pipes is arranged alternately along both sides of the air inlet main pipe, and the bottom of each aeration branch pipe has a downward-facing aeration hole. The main intake pipe is connected to the process gas pipeline.

2. The high-salt wastewater mixed salt drum dryer apparatus as claimed in claim 1, wherein, The bottom of the feed trough of the dryer body is a concave arc-shaped structure, and the aeration branch pipe is a conical structure.

3. The high-salt wastewater mixed salt drum dryer apparatus of claim 2, wherein, The diameters of the aeration holes on each aeration branch pipe, from the inside out, are 19.05 mm, 12.7 mm, and 9.525 mm, respectively.

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