Evaporator external circulation descaling device

Abstract

The utility model relates to evaporator technical field discloses a kind of evaporator external circulation descaling device, including evaporator main body, the evaporator main body one end is communicated with one of circulation pump one end by pipeline, and circulation pump other end is communicated with filter box one end by pipeline, the filter box is provided with filter structure along horizontal direction, and filter box is located filter structure other side and is communicated with another circulation pump one end by pipeline, another the other end of circulation pump is communicated with evaporator main body other end by pipeline, the filter box one side is provided with chemical reagent spraying port, the device of the utility model removes the particulate matter of forming sediment in time, prevents the adhesion of scale body in equipment inner wall, reduces heat transfer resistance, improves the heat transfer performance of evaporator main body, to prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, specifically to an external circulating descaling device for evaporators. Background Technology

[0002] Evaporators play a crucial role as key equipment in many industrial production processes. For example, in industries such as chemical, pharmaceutical, and food processing, evaporators are often used for operations such as solution concentration and crystallization. However, during the evaporation process, because the raw materials often contain carbonate, sulfate ions, and impurity ions such as calcium, magnesium, iron, and others, the concentration of these ions in the solution gradually increases as evaporation proceeds. These ions easily combine to form calcium sulfate, calcium carbonate, and some complex double salt precipitates that are difficult to dissolve in water.

[0003] These deposits formed during the evaporation process gradually adhere to the inner walls of the equipment and pipes. As the scale thickens, it causes numerous serious problems for the normal operation of the evaporator. On the one hand, the scale accumulates on the heating surfaces of the evaporator and the inner walls of the pipes, significantly reducing the heat transfer efficiency of the evaporator. This not only increases energy consumption but also prolongs production time and reduces production efficiency. On the other hand, scale deposition reduces the inner diameter of the pipes, increases flow resistance, and may even block the pipes, affecting the normal circulation of the solution and threatening the safe and stable operation of the equipment. Furthermore, cleaning these complex double salt and calcium sulfate precipitates is extremely tedious and difficult, requiring shutdown, which not only increases maintenance costs but also interrupts production, causing economic losses to the company.

[0004] Currently, existing descaling methods have various shortcomings. Some traditional methods, such as physical cleaning, can remove scale deposits to a certain extent, but they often require long reaction times, have limited effectiveness, and can easily damage equipment. Chemical cleaning methods, while effectively removing scale, require large amounts of chemical reagents, which may pollute the environment, and also suffer from complex operation and high costs. Moreover, most existing methods operate inside the evaporator, which can affect the normal operation of the evaporator and hinder continuous production. Based on this, this application proposes an external circulating descaling device for the evaporator. Utility Model Content

[0005] The purpose of this invention is to provide an external circulating descaling device for evaporators to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an external circulating descaling device for an evaporator, comprising an evaporator body, one end of which is connected to one end of a circulating pump via a pipe, and the other end of the circulating pump is connected to one end of a filter box via a pipe, the filter box having a filter structure arranged horizontally, and the filter box located on the other side of the filter structure being connected to one end of another circulating pump via a pipe, the other end of the other circulating pump being connected to the other end of the evaporator body via a pipe, and a chemical reagent spray port being provided on one side of the filter box.

[0007] Preferably, a control box is provided on one side of the filter box, and the control box contains a controller and a power supply.

[0008] Preferably, a sensor is installed inside the evaporator body, and the sensor is connected to one end of the controller via a signal connection.

[0009] Preferably, each of the circulating pumps is electrically connected to the controller and power supply in the control box via wires.

[0010] Compared with the prior art, the advantages of this utility model are as follows:

[0011] This invention improves the heat transfer efficiency of the evaporator and extends the service life of the equipment. By timely removing the particulate matter that forms precipitates, it prevents scale from adhering to the inner wall of the equipment, reduces heat transfer resistance, improves the heat transfer performance of the evaporator, and thus extends the service life of the equipment.

[0012] The external circulation structure can operate independently without affecting the normal operation of the evaporator body. It is independent of the evaporator body and will not affect the evaporation process of the evaporator body during descaling, thus ensuring the continuity of production.

[0013] Various filtration structures can be selected for filtration according to actual conditions, making it highly adaptable. The appropriate filtration method can be selected based on factors such as the nature of the solution, the content and size of the scale particles, thereby improving the filtration effect and the adaptability of the device.

[0014] By introducing conditions that promote the binding of calcium sulfate and other precipitates, the calcium removal effect is improved. By fine-tuning the pH value of the solution, the rate of calcium sulfate and other precipitates is increased, further enhancing the descaling effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Evaporator body; 2. Circulation pump; 3. Filter box; 4. Filter structure; 5. Chemical reagent spray nozzle. 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] Example 1

[0019] Please see Figure 1 The figure shows an external circulating descaling device for an evaporator, including an evaporator body 1. One end of the evaporator body 1 is connected to one end of a circulating pump 2 through a pipe, and the other end of the circulating pump 2 is connected to one end of a filter box 3 through a pipe. The filter box 3 is provided with a filter structure 4 in a horizontal direction, and the filter box 3 is located on the other side of the filter structure 4 and is connected to one end of another circulating pump 2 through a pipe. The other end of the other circulating pump 2 is connected to the other end of the evaporator body 1 through a pipe. A chemical reagent spray port 5 is provided on one side of the filter box 3.

[0020] In this embodiment, a control box is provided on one side of the filter box 3, and a controller and a power supply are provided inside the control box. A sensor is provided inside the evaporator body 1, and the sensor is connected to one end of the controller. Each circulation pump 2 is electrically connected to the controller and the power supply in the control box through wires.

[0021] Furthermore, the sensor is used to monitor parameters such as the content of insoluble particles, temperature, and pressure in the solution inside the evaporator body 1. Based on preset thresholds, it sends signals to the controller in the control box to automatically start or stop multiple circulation pumps 2. One of the circulation pumps 2 is used to pump the solution inside the evaporator body 1 into the filter box 3. Then, an appropriate amount of chemical reagent, such as sodium carbonate or sodium hydroxide, is added into the filter box 3 through the chemical reagent spray port 5 to promote the synthesis reaction of calcium carbonate and calcium sulfate, converting them into precipitates that are easier to filter. This promotes the reaction of calcium sulfate and other precipitates in the filter box 3. At the same time, the reaction rate of calcium sulfate and other precipitates can be increased by finely adjusting the pH value of the solution in the filter box 3, further improving the descaling effect.

[0022] Furthermore, the filtration structure 4 can be a filter screen structure or an ultrafiltration system. The filtration unit can be designed as a multi-stage filtration structure. First, larger particles of impurities are removed through a coarse filter screen, and then smaller particles of calcium sulfate and other precipitates are removed through a fine filter screen. For some special solutions, filter membranes made of special materials can be used to improve filtration efficiency and durability. First, larger particles of impurities are removed through a coarse filter screen. The pore size of the coarse filter screen can be selected according to the size of the impurities in the solution, generally around 0.7 mm. Then, smaller particles of calcium sulfate and other precipitates are removed through a fine filter screen. The pore size of the fine filter screen can be between 0.5 micrometers. The filter screen can be made of stainless steel or other materials, which have high strength and corrosion resistance, and are easy to clean and replace.

[0023] Ultrafiltration uses an ultrafiltration membrane to filter the solution. The pore size of the ultrafiltration membrane is generally between 0.01-0.1μm, which can effectively remove fine calcium sulfate particles and other precipitates and large organic molecules in the solution. Ultrafiltration membranes can be made of materials such as polysulfone and polyacrylonitrile, which have good filtration performance and chemical corrosion resistance. For some special solutions, special filter membranes can be used to improve the filtration effect and durability. The solution filtered by the filter structure 4 of the filter box 3 is returned to the evaporator body 1 by another circulation pump 2 to continue the evaporation operation. A conductivity monitoring point is also set on the pipeline of the circulation pump 2 to return the solution to the evaporator body 1 to monitor the quality of the filtered solution in real time and ensure that the returned solution meets the operating requirements of the evaporator.

[0024] The working principle of this utility model is as follows: The sensor monitors parameters such as the content of insoluble particles, temperature, and pressure in the solution within the evaporator body 1. Based on a preset threshold, it sends a signal to the controller in the control box, thereby automatically starting or stopping multiple circulation pumps 2. One of the circulation pumps 2 pumps the solution from the evaporator body 1 into the filter box 3. Then, an appropriate amount of chemical reagent, such as sodium carbonate or sodium hydroxide, is added to the filter box 3 through the chemical reagent spray port 5. This promotes the synthesis reaction of calcium carbonate and calcium sulfate, converting them into more easily filtered precipitates. It also promotes the reaction of calcium sulfate and other precipitates in the filter box 3. Simultaneously, the pH value of the solution in the filter box 3 can be finely adjusted to increase the reaction rate of calcium sulfate and other precipitates, further improving the descaling effect. The filter structure 4 can be a screen filter or an ultrafiltration system. The filter unit can be designed as a multi-stage filtration structure. First, larger particles of impurities are removed through a coarse filter, and then smaller particles of calcium sulfate and other precipitates are removed through a fine filter. For some special solutions, special filter membranes can be used to improve filtration efficiency and durability. The filter screen removes larger particles of impurities. The pore size of the coarse filter screen can be selected according to the size of the impurities in the solution, generally around 0.7 mm. Then, a fine filter screen further removes tiny calcium sulfate and other precipitate particles. The pore size of the fine filter screen can be between 0.5 micrometers. The filter screen can be made of stainless steel or other materials, which have high strength and corrosion resistance, and are easy to clean and replace. Ultrafiltration uses an ultrafiltration membrane to filter the solution. The pore size of the ultrafiltration membrane is generally between 0.01-0.1 μm, which can effectively remove fine calcium sulfate particles and other precipitates from the solution. For macromolecular organic compounds, ultrafiltration membranes can be made of materials such as polysulfone and polyacrylonitrile, which have good filtration performance and chemical corrosion resistance. For some special solutions, special filter membranes can also be used to improve filtration effect and durability. The solution filtered by the filter structure 4 of the filter box 3 is returned to the evaporator body 1 by another circulation pump 2 to continue the evaporation operation. A conductivity monitoring point is also set on the pipeline of the circulation pump 2 to return the solution to the evaporator body 1 to monitor the quality of the filtered solution in real time and ensure that the returned solution meets the operating requirements of the evaporator.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external circulating descaling device for evaporator, comprising an evaporator body (1), characterized in that: one end of the evaporator body (1) is communicated with one end of one circulating pump (2) through a pipeline, and the other end of the circulating pump (2) is communicated with one end of a filter box (3) through a pipeline, the filter box (3) is provided with a filter structure (4) along the horizontal direction, and the other side of the filter structure (4) is communicated with the other end of the other circulating pump (2) through a pipeline, and the other end of the other circulating pump (2) is communicated with the other end of the evaporator body (1) through a pipeline, and one side of the filter box (3) is provided with a chemical agent spraying port (5).

2. The external circulation descaling device of the evaporator according to claim 1, characterized in that: One side of the filter box (3) is provided with a control box, and the control box is provided with a controller and a power supply.

3. The external circulation descaling device of the evaporator according to claim 2, characterized in that: The evaporator body (1) is provided with a sensor, and one end of the sensor is signal connected with the controller.

4. The external circulation descaling device of the evaporator according to claim 3, characterized in that: Each circulating pump (2) is electrically connected with the controller and the power supply in the control box through a wire respectively.

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