Cooling tower system for preparing water from aluminum oxide washing flocculant

Abstract

The utility model discloses a cooling tower system for aluminum oxide washing flocculant preparation water, which comprises an evaporation qualified water tank and a settling hot water tank, and a water outlet of the settling hot water tank is communicated with a flocculant settling tank through a flocculant preparation water pump. A direct supply spraying system used for cooling the qualified evaporation water is further arranged between the qualified evaporation water tank and the settling hot water tank, the direct supply spraying system is arranged above the settling hot water tank, and the qualified evaporation water tank is communicated with a water inlet of the direct supply spraying system through a qualified water pump. After transformation, air cooling and air natural convection are utilized for heat dissipation, and a hot water pump and a cold water pump are not used any more, so that the electricity consumption is reduced, the system operation energy consumption is reduced, the production cost is reduced, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This utility model relates to cooling tower systems, and more specifically, to a cooling tower system for preparing water from alumina washing flocculants. Background Technology

[0002] In recent years, my country's alumina industry has faced increasingly severe energy and environmental pressures. The increasing cost per unit of alumina consumption necessitates energy conservation and emission reduction, which has become the main theme of the industry's development. However, in actual alumina production, the settling tank system has long been a major consumer of electricity. With rising coal prices, electricity prices have increased rapidly, leading to higher alumina production costs.

[0003] Sedimentation is one of the main processes in alumina production. Flocculants can improve the efficiency of sedimentation tanks, and their good sedimentation separation effect is widely recognized. However, there are many drawbacks to the use of flocculants in production, which affect the normal performance of the flocculants.

[0004] The preparation of washing flocculants requires a large amount of process water, and water temperature has a significant impact on flocculation efficiency. As temperature increases, dissolution time shortens, the molecular weight of the flocculant decreases, and sedimentation performance weakens. Especially when prepared at temperatures above 70℃, the high-temperature aqueous solution degrades the flocculant's molecular chains, causing a rapid decrease in molecular weight and a slower settling velocity. Therefore, the water temperature for flocculant preparation should not exceed 50℃.

[0005] A cooling tower is an important auxiliary facility for the preparation of water for alumina washing flocculants. After being treated in the evaporation process, the qualified water from the crude liquid that meets the process requirements is cooled in the cooling tower, providing a stable supply of cooling water for the alumina washing flocculant preparation process. The cooling tower not only ensures temperature control during the dissolution and dilution of the flocculant but also enables the recycling of water resources.

[0006] Currently, the cooling of water used for preparing flocculants is mainly achieved through packed cooling towers. However, these towers generally suffer from the following problems: the packing is prone to scaling and aging; the cooling efficiency is low, making it difficult to meet the water temperature requirements of the alumina production process; fans and pumps are required to provide power to maintain the flow of air and water, especially in high-temperature and high-humidity environments, resulting in high energy consumption and increased operating costs, which does not meet the requirements of energy conservation and environmental protection; the packing needs to be cleaned and replaced regularly, and its disposal pollutes the environment, while other components of the cooling tower (such as fans and pumps) also require maintenance, increasing maintenance costs.

[0007] Therefore, there is an urgent need for a high-efficiency and energy-saving cooling tower system to meet the process requirements for the preparation of alumina washing flocculants. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a highly efficient and energy-saving cooling tower system for preparing water from alumina washing flocculants.

[0009] The purpose of this utility model is achieved by the following technical solution.

[0010] The present invention provides a cooling tower system for preparing water for alumina washing flocculant, comprising an evaporation qualified water tank and a settling hot water tank. The outlet of the settling hot water tank is connected to the flocculant settling tank via a flocculant preparation water pump. A direct spray system for cooling the evaporation qualified water is also provided between the evaporation qualified water tank and the settling hot water tank. The direct spray system is located above the settling hot water tank, and the evaporation qualified water tank is connected to the inlet of the direct spray system via a qualified water pump.

[0011] Preferably, the direct-supply sprinkler system includes a main water pipe, a branch water pipe connected to the main water pipe, and a spray pipe connected to the branch water pipe.

[0012] Preferably, at least three component water pipes are arranged in parallel on the main water pipe, and each component water pipe is provided with at least three spray pipes.

[0013] Preferably, at least three nozzles are grouped together and connected to the water distribution pipe via flanges.

[0014] Preferably, the nozzle is vertically arranged, and the spray direction of the nozzle is opposite to the water flow direction of the settling hot water tank.

[0015] Preferably, the direct-supply spray system is fixed above the settling hot water tank by a bracket.

[0016] Preferably, the main water pipe of the direct-supply sprinkler system is connected to the qualified evaporation water tank via a qualified water pump.

[0017] Preferably, the length of the main water pipe is 20 to 50 meters.

[0018] The technical solution of this utility model produces the following beneficial effects:

[0019] This invention utilizes a direct-supply spray system to cool the qualified water delivered by evaporation through spraying, reducing the temperature of the qualified water from the crude liquid evaporation to approximately 40°C. This water is then used in the preparation of alumina washing flocculants, resulting in high efficiency and energy savings.

[0020] After the modification, not only can the water temperature be lowered, but the electricity consumption, system energy consumption, and overall production costs can also be reduced by eliminating the need for hot water pumps and cold water pumps, thus saving energy and protecting the environment.

[0021] By utilizing air cooling and natural air convection for heat dissipation, and because the nozzles are evenly positioned above the settling hot water tank, the heat dissipation area is larger. This eliminates the need for multiple cooling cycles, allowing the water temperature to be reduced quickly to meet the requirements of the flocculant water temperature and improve cooling efficiency.

[0022] This utility model has the advantages of reasonable structural design, convenient maintenance and use, low maintenance and operating costs, high efficiency, energy saving and environmental protection, and can meet the process requirements for the preparation of alumina washing flocculants. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the existing cooling tower with packing material in use.

[0025] Figure 2 This is a schematic diagram of the cooling tower system for preparing water using alumina washing flocculant according to this utility model;

[0026] Figure 3 This is a diagram showing the positional relationship between the direct-supply spray system and the settling hot water tank of this utility model;

[0027] Figure 4 This is a structural schematic diagram of the direct-supply sprinkler system of this utility model.

[0028] In the diagram: 1-Evaporation qualified water tank, 2-Settling hot water tank, 3-Flocculant preparation water pump, 4-Flocculant settling tank, 5-Direct supply spray system, 6-Qualified water pump, 7-Cooling tower with packing, 8-Hot water pump, 9-Cold water pump. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] like Figure 1 As shown, in operation, the existing packed cooling tower 7 operates as follows: the inlet of the packed cooling tower 7 is connected to the outlet of the settling hot water tank 2 via a hot water pump 8, and the inlet of the settling hot water tank 2 is connected to the evaporation qualified water tank 1 via a qualified water pump 6. The qualified water from the evaporation qualified water tank 1 flows into the settling hot water tank 2 via the qualified water pump 6, and then enters the packed cooling tower 7 via the hot water pump 8 for cooling. The cooled water then flows back into the settling hot water tank 2 via the cold water pump 9. After multiple cycles of cooling, when the water temperature drops to a suitable level of approximately 40°C, the cooling water flows into the flocculant settling tank 4 via the flocculant preparation pump 3 for the preparation of alumina washing flocculant. This cooling process is relatively cumbersome, requiring power from the hot water pump 8 and the cold water pump 9 to maintain air and water flow, resulting in high energy consumption and increased operating costs, which does not meet energy conservation and environmental protection requirements. Furthermore, the packing material needs regular cleaning and replacement, polluting the environment upon disposal, and the hot water pump and cold water pump require maintenance, leading to high maintenance costs.

[0031] like Figures 2 to 4 This utility model relates to a cooling tower system for preparing water for alumina washing flocculant, comprising an evaporation qualified water tank 1 and a settling hot water tank 2. The outlet of the settling hot water tank 2 is connected to the flocculant settling tank 4 via a flocculant preparation water pump 3. A direct supply spray system 5 for cooling the evaporation qualified water is also provided between the evaporation qualified water tank 1 and the settling hot water tank 2. The direct supply spray system 5 is located above the settling hot water tank 2, and the evaporation qualified water tank 1 is connected to the inlet of the direct supply spray system 5 via a qualified water pump 6.

[0032] In a preferred embodiment, the direct-supply spray system 5 includes a main water pipe 5.1, a branch water pipe 5.2 connected to the main water pipe 5.1, and a spray pipe 5.3 connected to the branch water pipe 5.2. In this way, the qualified evaporation water tank 1 enters the direct-supply spray system 5 via a qualified water pump 6. The qualified evaporation water is cooled by the direct-supply spray system 5, which not only meets the temperature requirements for the flocculant water but also reduces electricity consumption, system operating energy consumption, and overall production costs by eliminating the need for hot and cold water pumps, thus achieving energy conservation and environmental protection.

[0033] In a preferred embodiment, at least three branch water pipes 5.2 are arranged in parallel on the main water pipe 5.1, and each branch water pipe 5.2 is equipped with at least three spray nozzles 5.3. This results in faster cooling, improved cooling efficiency, and a reasonable structural design that facilitates maintenance and use, while also reducing maintenance and operating costs.

[0034] In a preferred embodiment, at least three nozzles 5.3 are grouped together and connected to the water distribution pipe 5.2 via flanges 5.4. This arrangement of nozzles 5.3 above the settling hot water tank 2 results in a larger heat dissipation area, eliminating the need for multiple cooling cycles to achieve the required flocculant water temperature and improving cooling efficiency.

[0035] In a preferred embodiment, the nozzle 5.3 is vertically arranged, and the water spray direction of the nozzle 5.3 is opposite to the water flow direction of the settling hot water tank 2. In this way, the water temperature can be quickly reduced through air cooling and natural convection.

[0036] In a preferred embodiment, the direct-supply spray system 5 is fixed above the settling hot water tank 2 by a bracket 5.5. This results in a larger heat dissipation area, eliminating the need for multiple cooling cycles to achieve the required flocculant water temperature and improving cooling efficiency.

[0037] In a preferred embodiment, the main water pipe 5.1 is connected to the qualified evaporation water tank 1 via a qualified water pump 6. Thus, the qualified evaporation water tank 1 enters the direct-supply spray system 5 via the qualified water pump 6, and then flows through the main water pipe 5.1 into the spray nozzles 5.3 on the branch water pipe 5.2, thereby achieving the purpose of rapidly reducing the water temperature.

[0038] As a preferred embodiment, the main water pipe 5.1 is 20 to 50 meters long. This allows for the pipe to be extended as much as possible when space permits, naturally lowering the water temperature and making it more energy-efficient and environmentally friendly.

[0039] Example

[0040] like Figures 2-4 As shown, the cooling tower system for preparing water for alumina washing flocculant includes an evaporation qualified water tank 1 and a settling hot water tank 2. The outlet of the settling hot water tank 2 is connected to the flocculant settling tank 4 through a flocculant preparation water pump 3. A direct spray system 5 for cooling the evaporation qualified water is also provided between the evaporation qualified water tank 1 and the settling hot water tank 2.

[0041] The direct-supply sprinkler system 5 includes a main water pipe 5.1, a branch water pipe 5.2 connected to the main water pipe 5.1, and a spray pipe 5.3 connected to the branch water pipe 5.2. The main water pipe 5.1 is 35 meters long. The direct-supply sprinkler system 5 is fixed above the settling hot water tank 2 by a bracket 5.5. The qualified evaporation water tank 1 is connected to the inlet of the main water pipe 5.1 of the direct-supply sprinkler system 5 through a qualified water pump 6.

[0042] Four branch water pipes 5.2 are installed parallel to the main water pipe 5.1, and eight spray pipes 5.3 are installed vertically on each branch water pipe 5.2. The four spray pipes 5.3 form a group and are connected to the branch water pipes 5.2 through flanges 5.4. The spray pipes 5.3 are installed vertically, and the spray direction of the spray pipes 5.3 is opposite to the water flow direction of the settling hot water tank 2.

[0043] When using this utility model:

[0044] After the evaporation process, the qualified water from the crude liquid that meets the process requirements is collected in the qualified evaporation water tank 1. It is then pumped by the qualified water pump 6 into the inlet of the main water pipe 5.1 of the direct spray system 5, and from there into the four-part water distribution pipe 5.2. The qualified evaporation water is sprayed out from eight nozzles 5.3. Utilizing air cooling and natural convection, the qualified evaporation water is sprayed to lower its temperature. It then naturally settles in the settling hot water tank 2, reducing the temperature of the qualified evaporation water to approximately 40°C. The outlet of the settling hot water tank 2 flows into the flocculant settling tank 4 via the flocculant preparation pump 3, providing stable cooling water for the preparation of the alumina washing flocculant.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, 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 cooling tower system for preparing water for alumina washing flocculant, comprising an evaporation qualified water tank (1), a settling hot water tank (2), a flocculant preparation water pump (3), and a flocculant settling tank (4), wherein the outlet of the settling hot water tank (2) is connected to the flocculant settling tank (4) via the flocculant preparation water pump (3), characterized in that, A direct spray system (5) for cooling the evaporated qualified water is also provided between the evaporated qualified water tank (1) and the settling hot water tank (2). The direct spray system (5) is located above the settling hot water tank (2). The evaporated qualified water tank (1) is connected to the inlet of the direct spray system (5) through a qualified water pump (6).

2. The cooling tower system for preparing water from alumina washing flocculant as described in claim 1, characterized in that: The direct-supply sprinkler system (5) includes a main water pipe (5.1), a branch water pipe (5.2) connected to the main water pipe (5.1), and a spray pipe (5.3) connected to the branch water pipe (5.2).

3. The cooling tower system for preparing water for alumina washing flocculant as described in claim 2, characterized in that: At least three component water pipes (5.2) are arranged in parallel on the main water pipe (5.1), and at least three spray pipes (5.3) are arranged on each component water pipe (5.2).

4. The cooling tower system for preparing water for alumina washing flocculant as described in claim 2 or 3, characterized in that: At least three nozzles (5.3) are grouped together and connected to the water distribution pipe (5.2) via a flange (5.4).

5. The cooling tower system for preparing water from alumina washing flocculant as described in claim 4, characterized in that: The nozzle (5.3) is set vertically, and the spray direction of the nozzle (5.3) is opposite to the water flow direction of the settling hot water tank (2).

6. The cooling tower system for preparing water from alumina washing flocculant as described in claim 4, characterized in that: The direct-supply spray system (5) is fixed above the settling hot water tank (2) by a bracket (5.5).

7. The cooling tower system for preparing water from alumina washing flocculant as described in claim 2 or 3, characterized in that: The main water pipe (5.1) of the direct-supply sprinkler system (5) is connected to the qualified evaporation tank (1) via a qualified water pump (6).

8. The cooling tower system for preparing water from alumina washing flocculant as described in claim 2 or 3, characterized in that: The length of the main water pipe (5.1) is 20-50 meters.

Images