Drying device for polyaluminum chloride production

Abstract

The utility model relates to the technical field of chemical production equipment, and discloses a drying device for polyaluminum chloride production, which comprises a roller dryer arranged on the ground and used for drying polyaluminum chloride particles, a discharge port and a storage tank are further arranged on the roller dryer, and the storage tank is communicated with the discharge port through a flange. The storage tank is used for storing dried polyaluminum chloride particles; the heat conduction fins are welded to the outer side of the storage tank, and the multiple heat conduction fins are annularly distributed at equal intervals according to the center of the storage tank; the preheating pipe is arranged on the outer side of the heat conduction fins and located on the outer side of the storage tank; the outer tank is fixedly installed on the outer side of the storage tank, and the side, close to the ground, of the outer tank is open. According to the drying device for polyaluminum chloride production, through a heat energy recovery and reutilization mechanism, the energy utilization efficiency is improved, the production cost is reduced, and the environment-friendly requirements of energy conservation and emission reduction are met.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production equipment, in particular to a drying device for producing polyaluminium chloride. Background Art

[0002] Polyaluminium chloride (PAC) easily absorbs moisture and expands in a high humidity environment, which increases the difficulty of storage and accelerates deterioration, affecting the quality and downstream applications. To ensure the quality of PAC, drying is essential. The drum dryer has become the preferred choice for PAC drying due to its high efficiency and uniform heating characteristics. The machine evenly distributes PAC particles through a rotating drum, and hot air or steam quickly evaporates moisture, promotes tumbling and mixing, and ensures uniform and efficient drying. At the same time, drum drying shortens the drying time and is equipped with a discharge port to continuously and stably output dry products, which is convenient for subsequent packaging, storage and transportation, reducing losses and increasing economic value.

[0003] At present, the drying process of polyaluminium chloride (PAC) generally relies on the traditional dryer design, and its core operating mechanism is highly dependent on the fan system. In this process, the fan, as a power source, is first responsible for extracting a large amount of air from the external environment. Subsequently, this cold air is directed to the built-in heating element area and converted into high-temperature hot air after efficient heating treatment. These high-temperature hot air are then sent into the dryer to fully contact with the PAC particles. Through heat conduction and convection, the moisture in the particles is effectively removed to achieve the drying goal. However, this traditional drying process has a defect that cannot be ignored: after the PAC particles reach the predetermined dryness, the high-temperature air carrying a large amount of waste heat is directly discharged from the outlet of the dryer to the external environment, and fails to be reasonably recovered and reused. This phenomenon not only causes a huge waste of heat energy and increases the energy consumption cost in the production process, but also violates the concept of energy conservation, emission reduction and sustainable development widely advocated by the current society. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to improve energy utilization efficiency and reduce production costs through a heat recovery and reuse mechanism, and to meet the environmental protection requirements of energy saving and emission reduction, and proposes a drying device for polyaluminium chloride production.

[0006] (II) Technical solution

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A drying device for producing polyaluminium chloride comprises a drum dryer placed on the ground and used for drying polyaluminium chloride particles, wherein the drum dryer is also provided with a discharge port.

[0009] A storage tank is connected to the discharge port through a flange and is used to store the dried polyaluminium chloride particles;

[0010] The heat conducting fins are welded to the outside of the storage tank, and are provided in a plurality of numbers and are distributed equidistantly in a circular shape according to the center of the storage tank;

[0011] A preheating tube is arranged outside the heat conducting fins and is located outside the storage tank;

[0012] The outer tank is fixedly installed on the outside of the storage tank and is open on one side close to the ground, and a preheating area is formed between the outer tank and the storage tank, wherein the heat conducting fins and the preheating pipe can preheat the air near the preheating area;

[0013] The hot air component is arranged on the drum dryer and is interconnected with the preheating area, and is used to extract the preheated air and heat it, so as to dry the polyaluminium chloride particles in the drum dryer.

[0014] On the basis of the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, the outer wall of the storage tank is processed with air outlet holes, wherein a plurality of air outlet holes are provided and are symmetrically distributed according to the center of the storage tank. An airflow guide plate is also fixedly installed on the outer side of the storage tank. The airflow guide plate is arranged in an annular shape as a whole and its cross section is arc-shaped.

[0016] Furthermore, a connecting ring is fixedly installed between the outer tank and the storage tank, wherein a filter screen is embedded on the connecting ring, and the filter screen is arranged in an annular shape as a whole, wherein the outer tank, the storage tank, the connecting ring and the filter screen are all arranged concentrically.

[0017] Furthermore, the preheating tube is composed of a spiral tube connected end to end, wherein the preheating tube is also filled with insulation material, and the inner wall of the outer tank is also pasted with insulation material, and the insulation material is one of glass fiber and perlite.

[0018] Furthermore, a discharge pipe is fixedly installed at one end of the storage tank close to the ground, wherein the discharge pipe and the storage tank are communicated with each other, and a valve is also provided on the discharge pipe.

[0019] Furthermore, the hot air component includes:

[0020] An air supply pipe, one end of which is fixedly mounted on the drum dryer and communicated with the interior of the drum dryer;

[0021] A fan is fixedly mounted on the other end of the air supply pipe, wherein the air outlet end of the fan is connected to the other end of the air supply pipe;

[0022] an air inlet pipe, which is disposed on the fan and is in communication with a suction end of the fan; and

[0023] The heating component is arranged in the air supply duct and can heat the extracted air to dry the particles in the drum dryer.

[0024] Furthermore, an anti-scalding isolation cover is also sleeved on the outer wall of the outer tank.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0027] The utility model introduces a storage tank as a continuous and stable storage container for the dried particles, and is connected to the discharge port of the drum dryer through a flange, which can not only store the dried polyaluminium chloride, but also lay a solid foundation for the subsequent waste heat recovery. The waste heat emitted by the dry particles stored in the storage tank is effectively utilized, realizing the initial recovery of heat energy and significantly reducing the direct loss of heat energy. In order to further improve the transfer and recovery efficiency of heat energy, the device welds a number of annular equidistantly distributed heat-conducting fins on the outside of the storage tank. These heat-conducting fins significantly increase the surface area of ​​heat exchange, and can efficiently transfer the waste heat in the storage tank to the external air, thereby improving the transfer efficiency of heat energy. At the same time, combined with the setting of the preheating pipe, the heat absorbed by the heat-conducting fins is further taken away and used to preheat the air, realizing the secondary utilization of heat energy and greatly enhancing the recovery and utilization effect of heat energy. In addition, the introduction of the outer tank constructs a unique preheating area, which is located outside the storage tank and close to the ground. Its opening design enables the preheating area to naturally receive and store the waste heat from the storage tank and the heat-conducting fins. The air near the preheating area is effectively preheated. This design not only improves the heat recovery efficiency, but also significantly reduces the initial heating energy consumption required by the drum dryer during the drying process by preheating the air. Finally, the setting of the hot air component extracts the preheated air and reheats it, and then sends it into the drum dryer as part of the drying heat source. Since the preheated air already has a certain temperature, it can reach the conditions required for drying more quickly, thereby improving the drying efficiency. This technical means not only effectively reduces energy consumption, but also significantly shortens the drying time and improves the overall production efficiency. In summary, the utility model solves the problems of heat energy waste and high energy consumption in the drying device for the production of polyaluminium chloride in the prior art through innovative designs such as waste heat recovery of storage tanks, heat exchange enhancement of heat-conducting fins, heat energy transfer of preheating pipes, construction of preheating areas of outer tanks, and hot air reuse of hot air components. These designs not only achieve efficient recovery and reuse of heat energy, but also significantly improve drying efficiency and reduce production costs, providing strong support for the green and efficient production of polyaluminium chloride. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall connection structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the cross-sectional connection structure between the storage tank and the outer tank of the utility model;

[0030] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 For this utility model Figure 2 Enlarged view of point B in the middle;

[0032] Figure 5 This is a schematic diagram of the connection structure between the heat-conducting fins and the preheating tube of the utility model;

[0033] Figure 6 It is a schematic diagram of the connection structure between the air supply pipe and the heating component of the utility model.

[0034] In the figure: 1. drum dryer; 2. discharge port; 3. storage tank; 4. heat-conducting fins; 5. preheating pipe; 6. outer tank; 7. hot air assembly; 71. air supply pipe; 72. fan; 73. air inlet pipe; 74. heating component; 8. air outlet; 9. air flow guide plate; 10. connecting ring; 11. filter screen; 12. discharge pipe; 13. anti-scalding isolation cover. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Combination Figure 1-Figure 6 As shown, a drying device for producing polyaluminium chloride of the utility model comprises a drum dryer 1 placed on the ground and used for drying polyaluminium chloride particles, wherein the drum dryer 1 is also provided with a discharge port 2.

[0037] The storage tank 3 is connected to the discharge port 2 through a flange and is used to store the dried polyaluminium chloride particles;

[0038] The heat conducting fins 4 are welded to the outside of the storage tank 3, and are provided in a plurality of numbers and are distributed equidistantly in a ring shape according to the center of the storage tank 3;

[0039] The preheating tube 5 is arranged outside the heat conducting fin 4 and is located outside the storage tank 3;

[0040] The outer tank 6 is fixedly mounted on the outer side of the storage tank 3 and is open on the side close to the ground, and a preheating area is formed between the outer tank 6 and the storage tank 3, wherein the heat conducting fins 4 and the preheating tubes 5 can preheat the air near the preheating area;

[0041] The hot air assembly 7 is disposed on the drum dryer 1 and is interconnected with the preheating area, and is used to extract the preheated air and heat it, so as to dry the polyaluminium chloride particles in the drum dryer 1 .

[0042] In the drying process of polyaluminium chloride particles, first, the particles to be dried are fed into a drum dryer 1 placed on the ground, and the particles are dried through the rotation of the drum and the action of the internal heating element. When the particles meet the drying requirements, they are continuously discharged through the discharge port 2 on the drum dryer 1, and the discharged dried polyaluminium chloride particles immediately enter the storage tank 3 connected to the discharge port 2 through a flange to achieve continuous and stable storage. At this time, the dry particles stored in the storage tank 3 will emit a certain amount of waste heat. In order to effectively utilize this part of the waste heat, a number of heat-conducting fins 4 are welded on the outside of the storage tank 3 and are equidistantly distributed in a ring shape according to the center thereof. These heat-conducting fins 4 can efficiently transfer the waste heat in the storage tank 3. The outer air is supplied to the outside, which increases the surface area of ​​heat exchange and improves the transfer efficiency of heat energy. At the same time, the preheating pipe 5 located on the outside of the heat-conducting fins 4 further enhances the efficiency of heat conduction and the area of ​​contact with the air. In addition, the outer tank 6 fixedly installed on the outside of the storage tank 3 and opened on the side close to the ground forms a preheating area with the storage tank 3. This preheating area can naturally receive and store the waste heat emitted from the storage tank 3 and the heat-conducting fins 4, and preheat the air near the preheating area. Finally, the hot air component 7 arranged on the drum dryer 1 is connected with the preheating area. The hot air component 7 is responsible for extracting the preheated air, further heating it, and then sending the hot air that has reached a certain temperature into the drum dryer. In the dryer 1, as part of the drying heat source, the new polyaluminium chloride particles are dried. Since the preheated air already contains a certain amount of heat energy, the conditions required for drying can be reached more quickly, which improves the drying efficiency and reduces the overall energy consumption. In summary, the drying device for polyaluminium chloride production realizes efficient recovery and reuse of heat energy through the waste heat recovery of the storage tank 3, the heat exchange enhancement of the heat-conducting fins 4, the heat energy transfer of the preheating pipe 5, the preheating area construction of the outer tank 6 and the hot air reuse of the hot air component 7, thereby improving the drying efficiency and reducing the production cost. It should be further explained that the design of the storage tank 3 cleverly combines the dual characteristics of heat insulation and efficient heat transfer to achieve the highest energy efficiency in the storage and drying process. The structure of Dahua is carefully divided into two major areas, the upper and lower areas. Each area uses the most suitable materials for its functional requirements. The lower part, as the core storage area, is constructed with high-performance thermal insulation materials. This material has extremely low thermal conductivity and can effectively isolate the impact of external temperature fluctuations on the environment inside the tank during storage, ensuring that the stored polyaluminium chloride particles are kept under stable temperature conditions to avoid quality degradation or safety hazards caused by rapid temperature changes. The use of thermal insulation materials not only improves storage efficiency, but also significantly reduces energy consumption, reflecting the design concept of energy conservation and environmental protection. The upper part cleverly uses materials with higher heat transfer efficiency. When the newly incoming air passes through the upper part, it can pre-absorb and store heat.Therefore, in the subsequent process, the drying operation can be carried out at a higher temperature, which greatly improves the heat utilization efficiency and drying effect.

[0043] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 , Figure 3 As shown; an air outlet hole 8 is processed on the outer wall of the storage tank 3, wherein the number of the air outlet holes 8 is set to be several and symmetrically distributed according to the center of the storage tank 3, and an air flow guide plate 9 is fixedly installed on the outside of the storage tank 3. The air flow guide plate 9 is arranged in an annular shape as a whole and its cross section is arc-shaped. The design of the several air outlet holes 8 enables the air inside the storage tank 3 that is heated by the waste heat emitted by the dry particles to be discharged in an orderly manner through these air outlet holes 8 and to exchange heat with the environment outside the storage tank 3. At the same time, in order to more effectively guide and control the flow direction of the discharged hot air, an air flow guide plate 9 is fixedly installed on the outside of the storage tank 3. The air flow guide plate 9 is arranged in an annular shape as a whole and its cross section is arc-shaped. Such a design can cleverly guide the hot air discharged from the air outlet hole 8 to flow along a predetermined path. Specifically, the air flow guide plate 9 can guide the hot air to the predetermined direction. The hot area and the preheating pipe 5 are arranged on the drum dryer 1, thereby further improving the recovery and utilization efficiency of heat energy. During operation, when the dry particles in the storage tank 3 emit waste heat, this heat will increase the air temperature inside the storage tank 3. Subsequently, the hot air is discharged through the air outlet 8 and flows to the preheating area under the guidance of the air flow guide plate 9. In the preheating area, the hot air exchanges heat with the cold air that is about to enter the drum dryer 1 to preheat the cold air, thereby reducing the initial heating energy consumption required by the drum dryer 1 during the drying process. In addition, since the number of air outlets 8 is set to be several and symmetrically distributed, this helps to ensure that the hot air can be evenly discharged from the storage tank 3 to avoid local overheating or poor hot air flow. The arc-shaped design of the air flow guide plate 9 can better adapt to the flow characteristics of the hot air, reduce the flow resistance, and improve the flow efficiency of the hot air.

[0044] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 , Figure 4As shown; a connecting ring 10 is fixedly installed between the outer tank 6 and the storage tank 3, wherein a filter screen 11 is embedded in the connecting ring 10, and the filter screen 11 is arranged in an annular shape as a whole, wherein the outer tank 6, the storage tank 3, the connecting ring 10 and the filter screen 11 are all arranged concentrically, and the connecting ring 10 serves as a bridge between the outer tank 6 and the storage tank 3, and is designed to be embedded with a filter screen 11, which is arranged in an annular shape as a whole, and is arranged concentrically with the outer tank 6, the storage tank 3, and the connecting ring 10. Such a layout ensures smooth and clean airflow during heat recovery. The main function of the filter screen 11 is to The function is to prevent fine particles or dust that may exist in the storage tank 3 from entering the preheating area or the inside of the outer tank 6 through the flow of hot air. If these fine particles are discharged directly without being filtered, it may not only affect the heat recovery efficiency, but also may have an adverse effect on subsequent processes or equipment. Therefore, the setting of the filter 11 effectively ensures the purity of the hot air and avoids unnecessary pollution and energy consumption. At the same time, since the filter 11, the outer tank 6, the storage tank 3 and the connecting ring 10 are all concentrically arranged, this layout is conducive to keeping the hot air uniform and stable during the flow process.

[0045] In a preferred embodiment, the present invention can be further configured as follows: Figure 3 , Figure 5 As shown; the preheating tube 5 is composed of a spiral tube connected end to end, wherein the preheating tube 5 is also filled with a heat-insulating material, and the inner wall of the outer tank 6 is also pasted with a heat-insulating material, and the heat-insulating material is one of glass fiber and perlite. The preheating tube 5 is composed of a spiral tube connected end to end. This design enables the preheating tube 5 to form a continuous, long-distance heat exchange path around the outside of the storage tank 3. The structure of the spiral tube increases the heat exchange area and improves the heat energy transfer efficiency. More importantly, the preheating tube 5 is also filled with a heat-insulating material. These heat-insulating materials, such as glass fiber or perlite, have excellent heat-insulating properties and can effectively The heat loss of the preheating tube 5 is reduced. In this way, during the heat exchange process, the preheating tube 5 always maintains a high temperature, thereby ensuring the full utilization of thermal energy. At the same time, in order to further improve the thermal insulation effect of the entire system, the inner wall of the outer tank 6 is also pasted with the same thermal insulation material as that in the preheating tube 5. This double thermal insulation design inside and outside not only enhances the thermal insulation performance of the outer tank 6 itself, but also forms a relatively closed preheating area with good thermal insulation effect. In this area, the air can be preheated, and the preheated air or fluid is sent to the drum dryer 1 for reuse, thereby realizing efficient recovery and reuse of thermal energy.

[0046] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 2As shown; a discharge pipe 12 is fixedly installed at one end of the storage tank 3 close to the ground, wherein the discharge pipe 12 and the storage tank 3 are interconnected, and a valve is also provided on the discharge pipe 12. The storage tank 3 serves as a storage container for the dried particulate matter, and a certain amount of dry polyaluminum chloride will accumulate inside it. When it is necessary to discharge these particulate matter from the storage tank 3 for subsequent use or treatment, the discharge pipe 12 plays a key role. The discharge pipe 12 and the storage tank 3 are interconnected to form a smooth material channel, so that the particulate matter can flow out of the storage tank 3 smoothly. A valve is also provided on the discharge pipe 12. The existence of this valve allows the operator to flexibly control the discharge speed and discharge amount of the particulate matter according to actual needs. When the particulate matter needs to be discharged, the valve can be opened to allow the particulate matter to flow out through the discharge pipe 12; when the discharge needs to be stopped, the valve only needs to be closed. This controllable discharge method not only improves the flexibility of the production process, but also helps to reduce the waste and pollution of particulate matter.

[0047] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 6 As shown; the hot air component 7 includes:

[0048] An air supply pipe 71, one end of which is fixedly mounted on the drum dryer 1 and communicated with the interior of the drum dryer 1;

[0049] The fan 72 is fixedly mounted on the other end of the air supply pipe 71, wherein the air outlet end of the fan 72 is connected to the other end of the air supply pipe 71;

[0050] an air inlet pipe 73, which is disposed on the fan 72 and is in communication with a suction end of the fan 72; and

[0051] The heating component 74 is arranged in the air supply pipe 71, which can heat the extracted air to dry the particulate matter in the drum dryer 1. The air supply pipe 71 is one of the core components of the hot air assembly 7. One end of the air supply pipe 71 is fixedly installed on the drum dryer 1 and is interconnected with the inside of the drum dryer 1. This design ensures that the hot air can directly and efficiently enter the inside of the drum dryer 1 to dry the particulate matter. Next, the fan 72 is fixedly installed on the other end of the air supply pipe 71, and its air outlet end is interconnected with the other end of the air supply pipe 71. The fan 72 serves as a power source and is responsible for generating a strong airflow to draw in the outside air or preheated air through the air inlet pipe 73 and send it into the drum dryer 1 through the air supply pipe 71. The air inlet pipe 73 is arranged on the fan 72 and is interconnected with the suction end of the fan 72, providing a stable air supply for the fan 72. Source, the heating component 74 is cleverly arranged in the air supply pipe 71, when the air drawn by the fan 72 flows through the air supply pipe 71, the heating component 74 will quickly heat the air, wherein the heating component 74 is preferably an electric heating wire, so that its temperature reaches the level required for drying the polyaluminium chloride particles, and the heated hot air is then sent into the drum dryer 1, and fully exchanges heat with the particles, thereby achieving the drying treatment of the particles. During the entire working process, the hot air component 7 continuously introduces the outside or preheated air into the air supply pipe 71 through the suction action of the fan 72, and heats the air to a suitable temperature through the heating action of the heating component 74, and then the high-temperature hot air is sent into the drum dryer 1, and exchanges heat with the polyaluminium chloride particles to be dried, evaporates the moisture in the particles, and achieves the purpose of drying.

[0052] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 As shown; an anti-scalding isolation cover 13 is also sleeved on the outer wall of the outer tank 6. As one of the key components in the entire drying device, the outer tank 6 is usually filled with high-temperature hot air, which is used to preheat or dry the polyaluminum chloride particles in the storage tank 3. However, when the high-temperature outer wall of the outer tank 6 directly contacts the external environment or the operator, it may cause a risk of scalding, and it may also accelerate the aging or damage of the equipment. In order to solve this problem, the anti-scalding isolation cover 13 is cleverly sleeved on the outer wall of the outer tank 6. The anti-scalding isolation cover 13 is usually made of high-temperature resistant and good heat-insulating materials, such as stainless steel, ceramic fiber, etc., which can effectively isolate the high temperature inside the outer tank 6 and prevent the heat from being quickly dissipated to the external environment. The risk of injury to the operator due to direct contact with the high-temperature outer wall is also avoided.

[0053] The specific working principle of the drying device for producing polyaluminium chloride in the utility model is as follows:

[0054] During operation, first, the polyaluminium chloride particles to be dried are sent into the drum dryer 1 for preliminary drying treatment. With the rotation of the drum and the blowing of the internal hot air, the particles gradually lose moisture and become dry. When the particles reach a certain degree of dryness, they are discharged through the discharge port 2 on the drum dryer 1 and stored in the storage tank 3 connected to the discharge port 2 through a flange. On the outside of the storage tank 3, a number of annular equidistantly distributed heat-conducting fins 4 are welded. These heat-conducting fins 4 not only increase the heat exchange area between the storage tank 3 and the external environment, but also transfer the high-temperature heat in the storage tank 3 to the outside air through their good thermal conductivity. At the same time, the preheating tube 5 is an additional preheating device, which is arranged on the outside of the heat-conducting fins 4 to further increase the air temperature in the preheating area. The preheating tube 5 is also filled with heat-insulating materials to reduce heat loss, and the inner wall of the outer tank 6 is also pasted with The same insulation material is used to form an efficient preheating space. The hot air in the storage tank 3 is guided by the air flow guide plate 9 and exists in the preheating area and heats the preheating pipe 5, so that the preheating pipe 5 always maintains a high temperature. The fan 72 draws the preheated air through the air inlet pipe 73 and sends it into the air supply pipe 71. In the air supply pipe 71, the heating component 74 further heats the air to make it reach the temperature required for drying the particulate matter in the drum dryer 1. Subsequently, the high-temperature hot air is sent into the drum dryer 1 through the air supply pipe 71, and heat exchanges with the particulate matter to be dried to complete the drying process. In order to maintain the purity of the air in the preheating area, a filter 11 is also provided. The filter 11 can effectively filter out impurities and particulate matter in the air. At the same time, external air can also enter the preheating area from the filter 11, thereby ensuring the fluidity of the entire gas.

[0055] When the dry particulate matter in the storage tank 3 accumulates to a certain amount, it can be discharged through the discharge pipe 12 at one end close to the ground. The discharge pipe 12 is provided with a valve to control the discharge speed and discharge amount of the particulate matter as needed. In addition, in order to prevent the high temperature of the outer wall of the outer tank 6 from causing scalding to the operator, an anti-scalding isolation cover 13 is also provided on its outer wall. The anti-scalding isolation cover 13 is made of a high-temperature resistant and heat-insulating material, which effectively isolates the high temperature inside the outer tank 6 and improves the safety of the equipment and the comfort of the operator.

[0056] In summary, the drying device for the production of polyaluminium chloride achieves efficient, continuous and controllable drying treatment of polyaluminium chloride particles through the preliminary drying of the drum dryer 1, the storage and preheating of the storage tank 3, the heating and air supply of the hot air component 7 and the synergistic effect of a series of auxiliary components.

[0057] It should also be noted that the flow rate and temperature of the hot air flow after entering the storage tank 3 are adjusted to a certain extent, so that when the hot air flow enters the storage tank 3, its energy is gradually weakened, forming a mild and stable thermal environment. This thermal environment is not only conducive to maintaining the temperature of the dried polyaluminium chloride particles in the storage tank 3, preventing them from cooling too quickly or reabsorbing moisture in the air, but also ensures that the hot air flow and the air subsequently extracted and heated by the fan 72 will not form a strong conflict state with each other.

[0058] Specifically, the direction of hot air is as follows Figure 2 As shown, in Figure 2 In the figure, it can be clearly seen that the hot air flow is guided from the preheating area through the air outlet 8 and the air flow guide plate 9, and enters the preheating area in a relatively gentle trajectory, and the external fresh air can enter the preheating area through the filter 11.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drying device for producing polyaluminium chloride, comprising a drum dryer (1) placed on the ground and used for drying polyaluminium chloride particles, wherein the drum dryer (1) is also provided with a discharge port (2), characterized in that: A storage tank (3) is connected to the discharge port (2) via a flange and is used to store the dried polyaluminium chloride particles; The heat conducting fins (4) are welded to the outside of the storage tank (3), and are provided in a plurality of numbers and are distributed in an annular manner and at equal intervals according to the center of the storage tank (3); A preheating tube (5) is arranged outside the heat-conducting fin (4) and is located outside the storage tank (3); The outer tank (6) is fixedly mounted on the outside of the storage tank (3) and is open on one side close to the ground, and a preheating area is formed between the outer tank (6) and the storage tank (3), wherein the heat conducting fins (4) and the preheating pipes (5) can preheat the air near the preheating area; The hot air component (7) is arranged on the drum dryer (1) and is interconnected with the preheating area, and is used to extract and heat the preheated air, thereby drying the polyaluminium chloride particles in the drum dryer (1).

2. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: The outer wall of the storage tank (3) is processed with air outlet holes (8), wherein the number of the air outlet holes (8) is set to be several and symmetrically distributed according to the center of the storage tank (3); an air flow guide plate (9) is also fixedly installed on the outer side of the storage tank (3); the air flow guide plate (9) is arranged in an annular shape as a whole and its cross section is arc-shaped.

3. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: A connecting ring (10) is fixedly installed between the outer tank (6) and the storage tank (3), wherein a filter screen (11) is embedded in the connecting ring (10), and the filter screen (11) is arranged in an annular shape as a whole, wherein the outer tank (6), the storage tank (3), the connecting ring (10) and the filter screen (11) are all arranged concentrically.

4. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: The preheating tube (5) is composed of a spiral tube connected end to end, wherein the preheating tube (5) is also filled with a heat-insulating material, and the inner wall of the outer tank (6) is also pasted with a heat-insulating material, and the heat-insulating material is one of glass fiber and perlite.

5. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: A discharge pipe (12) is fixedly installed at one end of the storage tank (3) close to the ground, wherein the discharge pipe (12) and the storage tank (3) are communicated with each other, and a valve is also provided on the discharge pipe (12).

6. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: The hot air component (7) comprises: An air supply pipe (71), one end of which is fixedly mounted on the drum dryer (1) and is in communication with the interior of the drum dryer (1); A fan (72) is fixedly mounted on the other end of the air supply pipe (71), wherein the air outlet end of the fan (72) is connected to the other end of the air supply pipe (71); an air inlet pipe (73) disposed on the fan (72) and communicated with a suction end of the fan (72); and The heating component (74) is arranged in the air supply pipe (71) and can heat the extracted air to dry the particles in the drum dryer (1).

7. A drying device for producing polyaluminium chloride according to claim 1, characterized in that: The outer wall of the outer tank (6) is also sleeved with an anti-scalding isolation cover (13).

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