An MVR evaporator crystallizer and its usage method

Abstract

This invention relates to the field of evaporator crystallizer technology, and more particularly to an MVR evaporator crystallizer and its usage method. The evaporator crystallizer includes a body, a sealing cover plate fixedly connected to the top of the body, and a sealing base plate fixedly connected to the bottom of the body. It also includes an anti-clogging mechanism for the evaporator crystallizer feed and a steam preheating assembly. A filter assembly is installed on the inner wall of a support assembly, a flow self-regulating assembly is installed within a limiting assembly and connected to the support assembly, and a steam preheating assembly is installed on the outer wall of the evaporator crystallizer body and connected to the limiting assembly. In this embodiment of the MVR evaporator crystallizer and its usage method, wastewater is heated and evaporated inside the evaporator crystallizer, removing moisture and concentrating residual substances. The generated high-temperature steam can be used to preheat the wastewater through the steam preheating assembly, thereby reducing pipe clogging problems in the evaporator crystallizer and effectively improving processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of evaporation crystallizer technology, specifically to an MVR evaporation crystallizer and its usage method. Background Technology

[0002] In industrial production, wastewater treatment is an important measure for environmental protection. MVR evaporator crystallizer is a commonly used device for wastewater treatment. Through the evaporation and crystallization process, harmful substances are removed from wastewater and useful components are recovered. However, in order to achieve more efficient evaporation and crystallization, the wastewater needs to be preheated before entering the MVR evaporator crystallizer to adjust its temperature to the optimal evaporation temperature.

[0003] In existing technologies, wastewater preheating is usually achieved through external heating devices, such as heat exchangers or direct heaters. While this method can effectively raise the wastewater temperature to the required level, it has several drawbacks. First, the additional heating equipment increases energy consumption, which not only increases operating costs but also the environmental burden of the entire treatment process. Second, this heating method often leads to uneven heating of the wastewater, especially when the flow rate is high or the heating equipment is improperly adjusted. Furthermore, the flow rate control of wastewater flowing into the MVR evaporator crystallizer is also an important factor affecting evaporation and crystallization efficiency. If the flow rate control is not precise, it will lead to uneven feeding, which will not only affect the thermal efficiency of the evaporator but may also affect the stability of the crystallization process and product quality. In extreme cases, uneven feeding may even cause blockage of the evaporator crystallizer pipes, resulting in equipment downtime and production losses. Summary of the Invention

[0004] To address the current limitations of MVR evaporator crystallizers on the market, additional heating equipment is required, increasing energy consumption. This not only increases operating costs but also the environmental burden of the entire process. Furthermore, inaccurate feed rate control leads to uneven feeding, which affects not only the thermal efficiency of the evaporator but may also impact the stability of the crystallization process and product quality. In extreme cases, uneven feeding may even cause blockages in the evaporator crystallizer's pipes, resulting in equipment downtime and production losses.

[0005] To achieve the above objectives, a first aspect of this application provides an MVR evaporator crystallizer, comprising an evaporator crystallizer body, a sealing cover plate fixedly connected to the top of the evaporator crystallizer body, a sealing base plate fixedly connected to the bottom of the evaporator crystallizer body, and further comprising an evaporator crystallizer feed anti-clogging mechanism and a steam preheating assembly. The evaporator crystallizer feed anti-clogging mechanism includes a steam pipe, a discharge pipe, a support assembly, a limiting assembly, a filter assembly, and a flow self-regulating assembly. One end of the steam pipe is fixedly connected to the top of the sealing cover plate, and one end of the discharge pipe is fixedly connected to the bottom of the sealing base plate. The support assembly is installed on the outer wall of the evaporator crystallizer body and communicates with the evaporator crystallizer body. The limiting assembly is installed on the top of the support assembly, the filter assembly is installed on the inner wall of the support assembly, the flow self-regulating assembly is installed inside the limiting assembly and connected to the support assembly, and the steam preheating assembly is installed on the outer wall of the evaporator crystallizer body and connected to the limiting assembly.

[0006] In this embodiment of the MVR evaporator crystallizer, a steam preheating component is installed on the outer wall of the evaporator crystallizer body and connected to a limiting component. Wastewater preheated by the steam preheating component is then injected into the limiting component. Within the limiting component, a flow self-regulating component can adaptively adjust the wastewater discharge rate. Before the wastewater is injected into the evaporator crystallizer body, it can be filtered by a filtration component, further preventing pipe blockage. After the wastewater is injected into the evaporator crystallizer body, it is heated and evaporated inside the evaporator crystallizer, removing moisture and concentrating residual substances. The generated high-temperature steam can then be used to preheat the wastewater by the steam preheating component. This reduces pipe blockage in the evaporator crystallizer and effectively improves processing efficiency.

[0007] In addition, the MVR evaporator crystallizer proposed in this application may also have the following additional technical features:

[0008] As a preferred embodiment of the present invention, the support assembly includes a feed housing, a mounting side plate, and fastening bolts, wherein the mounting side plate is symmetrically fixedly connected to both sides of the outer wall of the feed housing, the inner walls of the feed housing and the mounting side plate are both installed on the outer wall of the evaporator crystallizer body, and one end of the fastening bolt is threaded through the mounting side plate and screwed to the outer wall of the evaporator crystallizer body.

[0009] As a preferred embodiment of the present invention, the limiting component includes a support frame, an injection pipe, and a limiting top plate, wherein the support frame is fixedly connected to the top of the feeding housing, one end of the injection pipe is fixedly connected to the top of the feeding housing and located inside the support frame, and the limiting top plate is slidably engaged with the inner wall of the support frame.

[0010] As a preferred embodiment of the present invention, the filter assembly includes a limiting sleeve, a mounting frame, a sealing plate, a filter screen, and a handle. The limiting sleeve is symmetrically and fixedly connected to the inner wall of the feed housing. The mounting frame is slidably engaged with the inner wall of the limiting sleeve. The filter screen is engaged with the inner wall of the mounting frame. One end of the mounting frame slides through the outer wall of the feed housing and is fixedly connected to one side of the sealing plate. The handle is fixedly connected to the other side of the sealing plate.

[0011] As a preferred embodiment of the present invention, the flow self-adjusting assembly includes a limiting rod, a conical head, and a support spring, wherein one end of the limiting rod is fixedly connected to the bottom of the limiting top plate, the other end of the limiting rod slides through the top of the injection pipe and is fixedly connected to one end of the conical head, and the support spring is sleeved on the outer wall of the limiting rod.

[0012] As a preferred embodiment of the present invention, the steam preheating assembly includes a preheating shell, a pump body, an output pipe, an input pipe, and a spiral pipe. The preheating shell is fixedly connected to the outer wall of the evaporator crystallizer body. The pump body is installed on the top of the preheating shell. The output pipe is provided between the pump body and the injection pipe and is connected to the pump body. The input pipe is provided between the steam pipe and the bottom of the preheating shell and is connected to the input pipe. The spiral pipe is located on the inner wall of the preheating shell, and one end of the spiral pipe is fixedly connected to the end of the input pipe.

[0013] As a preferred embodiment of the present invention, an inspection cover plate is bolted to the outer wall of the feed housing, and a protective sleeve plate is fixedly connected to the outer wall of the inspection cover plate, and the protective sleeve plate is slidably sleeved on the outer wall of the sealing plate.

[0014] As a preferred embodiment of the present invention, the inner wall of the feed housing is provided with a discharge port, the outer wall of the evaporator crystallizer body is provided with a through groove that matches the discharge port, and the discharge port is located at the bottom of the filter screen.

[0015] As a preferred embodiment of the present invention, a solenoid valve is installed on the outer wall of the input pipe.

[0016] A method for using an MVR evaporator crystallizer includes the following steps:

[0017] S1. Preheat wastewater, start the MVR evaporator crystallizer and its auxiliary systems, ensure that all control systems are operating normally, and the steam generated during the operation of the evaporator crystallizer is introduced into the preheating chamber on the outer wall. The recovered hot steam is used to heat the preheating chamber and increase the temperature inside the preheating chamber.

[0018] S2. Wastewater is injected into the preheating chamber. The wastewater to be treated is transported to the preheating chamber through a dedicated pipeline. Inside the preheating chamber, the wastewater absorbs heat and its temperature gradually increases, thus preheating the wastewater for the subsequent evaporation process.

[0019] S3. Wastewater is transported to the evaporator crystallizer. The preheated wastewater is transported to the evaporator crystallizer through the pipeline connecting the preheating chamber and the evaporator crystallizer. The flow rate of wastewater flowing into the evaporator crystallizer is adjusted by the flow self-regulating component to ensure that the feed rate is appropriate.

[0020] S4. Evaporation process: Wastewater is heated and evaporated inside the evaporator crystallizer, removing moisture and concentrating residual substances.

[0021] S5. Crystallization and discharge: As evaporation proceeds, the concentration of dissolved solids in the solution increases, and crystallization begins. The concentrate and crystals are discharged from the bottom of the evaporator for further processing.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In this invention, a filter assembly is provided, which includes a mounting frame, a sealing plate, and a filter screen. One end of the mounting frame slides through the outer wall of the feed housing and is fixedly connected to one side of the sealing plate. The handle is fixedly connected to the other side of the sealing plate. Wastewater injected into the feed housing through the flow self-regulating assembly can be filtered by the filter screen, thereby avoiding the problem of pipe blockage caused by excessive impurities in the wastewater.

[0025] 2. In this invention, by setting a flow self-regulating component, the conical head and support spring in the flow self-regulating component can impact the conical head after the wastewater is injected into the injection pipe. When the fluid velocity decreases, the pressure decreases and the flow channel opening decreases; when the flow velocity increases, the flow channel opening increases. This allows for more precise control of the feeding speed and avoids problems such as uneven solution concentration and pipe blockage caused by improper feeding speed.

[0026] 3. In this invention, by setting up a steam preheating component, the spiral pipe in the steam preheating component allows steam to be transported to the inside of the spiral pipe through the input pipe. Then, wastewater is injected into the inside of the preheating shell, thereby preheating the wastewater through the spiral pipe. The preheated wastewater can then be output through the pump, thus optimizing the evaporation and crystallization process, improving wastewater treatment efficiency, reducing energy consumption and operating costs, and avoiding problems such as low crystallization efficiency and equipment damage caused by temperature or flow rate mismatch. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the MVR evaporator crystallizer of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of the MVR evaporator crystallizer of the present invention. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the structure of the MVR evaporator crystallizer of the present invention. Figure 3 ;

[0030] Figure 4 This is a schematic diagram of the structure of the limiting component of the present invention. Figure 1 ;

[0031] Figure 5 This is a schematic diagram of the structure of the limiting component of the present invention. Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the internal structure of the preheating shell of the present invention;

[0033] Figure 7 This is a schematic diagram of the internal structure of the feed housing of the present invention;

[0034] Figure 8 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0035] In the diagram: 1. Evaporator crystallizer body; 2. Sealing cover plate; 3. Sealing base plate; 4. Evaporator crystallizer feed anti-blocking mechanism; 41. Steam pipe; 42. Discharge pipe; 43. Support assembly; 431. Feed shell; 4311. Inspection cover plate; 4312. Protective sleeve plate; 432. Mounting side plate; 433. Fastening bolt; 44. Limiting assembly; 441. Support frame; 442. Injection pipe; 443. Limiting top plate; 45. Filter assembly; 451. Limiting sleeve plate; 452. Mounting frame; 453. Sealing plate; 454. Filter screen; 455. Handle; 46. Flow self-regulating assembly; 461. Limiting rod; 462. Conical head; 463. Support spring; 5. Steam preheating assembly; 51. Preheating shell; 52. Pump body; 53. Output pipe; 54. Input pipe; 541. Solenoid valve; 55. Spiral pipe. Detailed Implementation

[0036] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0037] The MVR evaporator crystallizer and its usage method according to embodiments of this application are described below with reference to the accompanying drawings.

[0038] The MVR evaporator crystallizer provided in this application can solve the problem that current MVR evaporator crystallizers on the market usually have a height adjustment mechanism to move the monitoring and sampling device to a higher position for atmospheric sampling in order to improve the accuracy of monitoring. However, the height adjustment mechanism is too high, making it inconvenient to disassemble and assemble, and it cannot adjust the sampling height according to the wind speed, which raises concerns about safety.

[0039] like Figures 1-8 As shown, the MVR evaporator crystallizer of this application embodiment may include an evaporator crystallizer body 1, a sealing cover plate 2 fixedly connected to the top of the evaporator crystallizer body 1, a sealing base plate 3 fixedly connected to the bottom of the evaporator crystallizer body 1, and also includes an evaporator crystallizer feed anti-blocking mechanism 4 and a steam preheating component 5.

[0040] The anti-clogging mechanism 4 for the evaporator crystallizer feed includes a steam pipe 41, a discharge pipe 42, a support assembly 43, a limiting assembly 44, a filter assembly 45, and a flow self-regulating assembly 46.

[0041] One end of the steam pipe 41 is fixedly connected to the top of the sealing cover plate 2, and one end of the discharge pipe 42 is fixedly connected to the bottom of the sealing base plate 3.

[0042] It should be noted that valve bodies are installed on the outer walls of both the steam pipe 41 and the discharge pipe 42 described in this embodiment.

[0043] The support component 43 is installed on the outer wall of the evaporator crystallizer body 1 and is connected to the evaporator crystallizer body 1.

[0044] It should be noted that the outer wall of the evaporator crystallizer body 1 described in this embodiment is provided with a through groove that communicates with the support component 43, and the support component 43 is also provided with a discharge port that matches the through groove.

[0045] The limiting component 44 is installed on the top of the support component 43, the filter component 45 is installed on the inner wall of the support component 43, and the flow self-regulating component 46 is installed inside the limiting component 44 and connected to the support component 43.

[0046] It should be noted that the limiting component 44 described in this embodiment is provided with a guide structure, and the flow self-adjusting component 46 is slidably installed inside the limiting component 44 through the guide structure, and the end of the flow self-adjusting component 46 passes through the support component 43.

[0047] The steam preheating component 5 is installed on the outer wall of the evaporator crystallizer body 1 and is connected to the limiting component 44.

[0048] It should be noted that the steam preheating component 5 described in this embodiment can be connected to the outer wall of the steam pipe 41. The steam generated by the steam pipe 41 can be preheated by the steam preheating component 5, and then the wastewater can be preheated by the steam preheating component 5. The preheated wastewater can be transported to the inside of the flow self-regulating component 46, and then injected into the inside of the evaporator crystallizer body 1 through the flow self-regulating component 46. This can make the feeding uniform and reduce the pipe blockage problem of the evaporator crystallizer. At the same time, the preheated wastewater can effectively improve the processing efficiency.

[0049] Specifically, during the wastewater treatment process through the evaporator crystallizer body 1, one end of the steam pipe 41 is fixedly connected to the top of the sealing cover plate 2, one end of the discharge pipe 42 is fixedly connected to the bottom of the sealing base plate 3, the support assembly 43 is installed on the outer wall of the evaporator crystallizer body 1 and connected to it, the limiting assembly 44 is installed on the top of the support assembly 43, the filter assembly 45 is installed on the inner wall of the support assembly 43, the flow self-regulating assembly 46 is installed inside the limiting assembly 44 and connected to the support assembly 43, and the steam preheating assembly 5 is installed on the outer wall of the evaporator crystallizer body 1 and connected to the limiting assembly 44. Thus, the wastewater is treated through the steam preheating assembly 5. The preheated wastewater is injected into the limiting component 44. The flow rate of the wastewater can be adaptively adjusted by the flow self-regulating component 46 within the limiting component 44. Before the wastewater is injected into the evaporator crystallizer body 1, it can be filtered by the filter component 45 to further avoid pipe blockage. After the wastewater is injected into the evaporator crystallizer body 1, it is heated and evaporated inside the evaporator crystallizer. The water is removed by evaporation, and the residual substances are concentrated. The high-temperature steam generated can be used to preheat the wastewater by the steam preheating component 5. This reduces the pipe blockage problem of the evaporator crystallizer and effectively improves the processing efficiency.

[0050] To clearly illustrate the above embodiment, in one example of this application, such as Figures 1-8 As shown, the support assembly 43 includes a feed housing 431, a mounting side plate 432, and fastening bolts 433. The mounting side plate 432 is symmetrically fixedly connected to both sides of the outer wall of the feed housing 431. The inner walls of the feed housing 431 and the mounting side plate 432 are both installed on the outer wall of the evaporator crystallizer body 1. One end of the fastening bolt 433 is threaded through the mounting side plate 432 and screwed to the outer wall of the evaporator crystallizer body 1.

[0051] It should be noted that the outer wall of the evaporator crystallizer body 1 described in this embodiment is provided with threaded holes that match the fastening bolts 433.

[0052] Specifically, in order to make the process of injecting preheated wastewater into the evaporator crystallizer body 1 more convenient, the mounting side plate 432 is symmetrically fixedly connected to both sides of the outer wall of the feed housing 431. The inner walls of the feed housing 431 and the mounting side plate 432 are both installed on the outer wall of the evaporator crystallizer body 1. One end of the fastening bolt 433 is threaded through the mounting side plate 432 and screwed to the outer wall of the evaporator crystallizer body 1. Thus, the fastening bolt 433 can ensure that the structure of the mounting side plate 432 and the feed housing 431 is more stable. At the same time, a sealing ring is installed at the junction of the inner wall of the feed housing 431 and the mounting side plate 432 and the outer wall of the evaporator crystallizer body 1.

[0053] In one example of this application, such as Figures 1-8 As shown, the limiting component 44 includes a support frame 441, an injection pipe 442, and a limiting top plate 443. The support frame 441 is fixedly connected to the top of the feeding housing 431, one end of the injection pipe 442 is fixedly connected to the top of the feeding housing 431 and located inside the support frame 441, and the limiting top plate 443 is slidably engaged with the inner wall of the support frame 441.

[0054] It should be noted that the inner wall of the support frame 441 described in this embodiment is symmetrically provided with guide grooves, and the two ends of the limiting top plate 443 are symmetrically fixedly connected with guide blocks that match the guide grooves.

[0055] Specifically, to make the wastewater discharge process more stable, the support frame 441 is fixedly connected to the top of the feed housing 431, one end of the injection pipe 442 is fixedly connected to the top of the feed housing 431 and located inside the support frame 441, and the limiting top plate 443 is slidably engaged with the inner wall of the support frame 441. Then, after the wastewater is injected into the injection pipe 442, it continuously impacts the flow self-regulating component 46. According to the flow rate, the flow self-regulating component 46 can adaptively adjust the opening size. Thus, the flow rate is adjusted by relying on the pressure change of the fluid itself, thereby ensuring the continuity and stability of the feeding process.

[0056] In one embodiment of this application, such as Figures 1-8 As shown, the filter assembly 45 includes a limiting sleeve 451, a mounting frame 452, a sealing plate 453, a filter screen 454, and a handle 455. The limiting sleeve 451 is symmetrically and fixedly connected to the inner wall of the feed housing 431. The mounting frame 452 is slidably engaged with the inner wall of the limiting sleeve 451. The filter screen 454 is engaged with the inner wall of the mounting frame 452. One end of the mounting frame 452 slides through the outer wall of the feed housing 431 and is fixedly connected to one side of the sealing plate 453. The handle 455 is fixedly connected to the other side of the sealing plate 453.

[0057] Furthermore, such as Figure 2 As shown, an inspection cover plate 4311 is bolted to the outer wall of the feed housing 431. A protective sleeve plate 4312 is fixedly connected to the outer wall of the inspection cover plate 4311. The protective sleeve plate 4312 is slidably sleeved on the outer wall of the sealing plate 453. An outlet is opened on the inner wall of the feed housing 431. A through groove matching the outlet is opened on the outer wall of the evaporator crystallizer body 1. The outlet is located at the bottom of the filter screen 454.

[0058] It should be noted that the end of the mounting frame 452 described in this embodiment is fitted and connected to the inner wall of the feed housing 431, and a support frame is fixedly connected to the inner wall of the mounting frame 452, and the filter screen 454 is snapped onto the support frame.

[0059] Specifically, to reduce pipe blockage, the limiting sleeve 451 is symmetrically fixedly connected to the inner wall of the feed housing 431, the mounting frame 452 is slidably engaged with the inner wall of the limiting sleeve 451, the filter screen 454 is engaged with the inner wall of the mounting frame 452, one end of the mounting frame 452 slides through the outer wall of the feed housing 431 and is fixedly connected to one side of the sealing plate 453, and the handle 455 is fixedly connected to the other side of the sealing plate 453. Wastewater injected into the feed housing 431 through the flow self-regulating component 46 can be filtered by the filter screen 454. When the filter screen 454 needs to be replaced, the mounting frame 452 can be pulled out by pulling the handle 455, so as to conveniently replace the filter screen 454.

[0060] In one embodiment of this application, such as Figures 1-8 As shown, the flow self-regulating assembly 46 includes a limiting rod 461, a conical head 462, and a support spring 463. One end of the limiting rod 461 is fixedly connected to the bottom of the limiting top plate 443, and the other end of the limiting rod 461 slides through the top of the injection pipe 442 and is fixedly connected to one end of the conical head 462. The support spring 463 is sleeved on the outer wall of the limiting rod 461.

[0061] It should be noted that the conical head 462 described in this embodiment is narrow at the top and wide at the bottom. A baffle plate is fixedly connected to the bottom of the conical head 462. Wastewater can impact the baffle plate, so the position of the conical head 462 can be continuously adjusted according to the flow rate. An inlet is provided at the top of the feed housing 431. Therefore, when the wastewater is not injected into the injection pipe 442, the outer wall of the baffle plate can abut against the inner wall of the inlet, thereby sealing the feed housing 431. The two ends of the support spring 463 are fixedly connected to the bottom of the limiting top plate 443 and the top of the injection pipe 442, respectively.

[0062] Specifically, in order to regulate the flow rate by adjusting the pressure of the fluid itself, thereby ensuring the continuity and stability of the feeding process, one end of the limiting rod 461 is fixedly connected to the bottom of the limiting top plate 443, and the other end of the limiting rod 461 slides through the top of the injection pipe 442 and is fixedly connected to one end of the conical head 462. The support spring 463 is sleeved on the outer wall of the limiting rod 461. Then, after the wastewater is injected into the inside of the injection pipe 442, it impacts the conical head 462. When the fluid flow rate decreases, the pressure decreases and the flow channel opening decreases; when the flow rate increases, the flow channel opening increases. This allows for more precise control of the feeding speed and avoids problems such as uneven solution concentration and pipe blockage caused by improper feeding speed.

[0063] In one embodiment of this application, such as Figures 1-8As shown, the steam preheating assembly 5 includes a preheating shell 51, a pump body 52, an output pipe 53, an input pipe 54, and a spiral pipe 55. The preheating shell 51 is fixedly connected to the outer wall of the evaporator crystallizer body 1. The pump body 52 is installed on the top of the preheating shell 51. An output pipe 53 is provided between the pump body 52 and the injection pipe 442 and is connected through the output pipe 53. An input pipe 54 is provided between the steam pipe 41 and the bottom of the preheating shell 51 and is connected through the input pipe 54. The spiral pipe 55 is located on the inner wall of the preheating shell 51, and both ends of the spiral pipe 55 are fixedly connected to the ends of the output pipe 53 and the input pipe 54, respectively.

[0064] Furthermore, such as Figure 2 As shown, a solenoid valve 541 is installed on the outer wall of the input pipe 54.

[0065] It should be noted that the preheating shell 51 described in this embodiment has an exhaust hole on its outer wall, which is connected to one end of the spiral pipe 55. The top of the preheating shell 51 has a liquid injection port, and a sealing plug is installed on the inner wall of the liquid injection port.

[0066] Specifically, in order to facilitate the preheating of waste liquid and reduce energy consumption, the preheating shell 51 is fixedly connected to the outer wall of the evaporator crystallizer body 1, the pump body 52 is installed on the top of the preheating shell 51, an output pipe 53 is provided between the pump body 52 and the injection pipe 442, and is connected through the output pipe 53, an input pipe 54 is provided between the steam pipe 41 and the bottom of the preheating shell 51, and is connected through the input pipe 54, and a spiral pipe 55 is located on the inner wall of the preheating shell 51, and both ends of the spiral pipe 55 are respectively connected to the output pipe. The ends of the input pipe 53 and the input pipe 54 are fixedly connected. Then, by opening the solenoid valve 541, the high-temperature steam can be transported through the input pipe 54 to the inside of the spiral pipe 55. Then, wastewater is injected into the inside of the preheating shell 51, so that the wastewater can be preheated through the spiral pipe 55. Then, the preheated wastewater can be output through the pump body 52. ​​This optimizes the evaporation and crystallization process, improves the wastewater treatment efficiency, reduces energy consumption and operating costs, and avoids the problems of low crystallization efficiency and equipment damage caused by temperature or flow rate mismatch.

[0067] A method for using an MVR evaporator crystallizer includes the following steps:

[0068] S1. Preheat wastewater, start the MVR evaporator crystallizer and its auxiliary systems, ensure that all control systems are operating normally, and the steam generated during the operation of the evaporator crystallizer is introduced into the preheating chamber on the outer wall. The recovered hot steam is used to heat the preheating chamber and increase the temperature inside the preheating chamber.

[0069] S2. Wastewater is injected into the preheating chamber. The wastewater to be treated is transported to the preheating chamber through a dedicated pipeline. Inside the preheating chamber, the wastewater absorbs heat and its temperature gradually increases, thus preheating the wastewater for the subsequent evaporation process.

[0070] S3. Wastewater is transported to the evaporator crystallizer. The preheated wastewater is transported to the evaporator crystallizer through the pipe connecting the preheating chamber and the evaporator crystallizer. The flow rate of wastewater flowing into the evaporator crystallizer is adjusted by the flow self-regulating component 46 to ensure that the feed rate is appropriate.

[0071] S4. Evaporation process: Wastewater is heated and evaporated inside the evaporator crystallizer, removing moisture and concentrating residual substances.

[0072] S5. Crystallization and Discharge: As evaporation proceeds, the concentration of dissolved solids in the solution increases, and crystallization begins. The concentrate and crystals are discharged from the bottom of the evaporator for further processing or disposal.

[0073] In summary, in the MVR evaporator crystallizer and its usage method of this application embodiment, the steam preheating component 5 is installed on the outer wall of the evaporator crystallizer body 1 and connected to the limiting component 44. The wastewater preheated by the steam preheating component 5 is then injected into the interior of the limiting component 44. In the limiting component 44, the flow rate of the wastewater discharge can be adaptively adjusted by the flow self-regulating component 46. Before the wastewater is injected into the interior of the evaporator crystallizer body 1, it can also be filtered by the filter component 45, further avoiding the problem of pipe blockage. After the wastewater is injected into the interior of the evaporator crystallizer body 1, the wastewater is heated and evaporated inside the evaporator crystallizer, the water is removed by evaporation, and the residual substances are concentrated. The high-temperature steam generated can be used to preheat the wastewater by the steam preheating component 5. Thus, the pipe blockage problem of the evaporator crystallizer is reduced, and the processing efficiency can be effectively improved.

[0074] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An mvr evaporative crystallizer, comprising an evaporative crystallizer body (1), a sealing cover plate (2) is fixedly connected to the top of the evaporative crystallizer body (1), and a sealing bottom plate (3) is fixedly connected to the bottom of the evaporative crystallizer body (1), characterized in that, It also includes an evaporation crystallizer feed anti-blocking mechanism (4) and a steam preheating assembly (5), wherein, The evaporation crystallizer feed anti-blocking mechanism (4) comprises a steam pipeline (41), a discharge pipeline (42), a support assembly (43), a limiting assembly (44), a filtering assembly (45) and a flow self-adjusting assembly (46), wherein, One end of the steam pipeline (41) is fixedly connected to the top of the sealing cover plate (2), and one end of the discharge pipeline (42) is fixedly connected to the bottom of the sealing bottom plate (3); The support assembly (43) is installed on the outer wall of the evaporation crystallizer body (1) and communicates with the evaporation crystallizer body (1); The limiting assembly (44) is installed on the top of the support assembly (43); The filtering assembly (45) is installed on the inner wall of the support assembly (43); The flow self-adjusting assembly (46) is installed in the limiting assembly (44) and connected with the support assembly (43); The steam preheating assembly (5) is installed on the outer wall of the evaporation crystallizer body (1) and connected with the limiting assembly (44); The support assembly (43) comprises a feed shell (431), an installation side plate (432) and a fastening bolt (433), wherein, The installation side plate (432) is fixedly connected to the outer wall of the feed shell (431) on both sides; The inner walls of the feed shell (431) and the installation side plate (432) are installed on the outer wall of the evaporation crystallizer body (1), and one end of the fastening bolt (433) is threaded through the installation side plate (432) and screwed with the outer wall of the evaporation crystallizer body (1); The limiting assembly (44) comprises a support frame (441), an injection pipeline (442) and a limiting top plate (443), wherein, The support frame (441) is fixedly connected to the top of the feed shell (431), and one end of the injection pipeline (442) is fixedly connected to the top of the feed shell (431) and located inside the support frame (441); The limiting top plate (443) is slidingly clamped on the inner wall of the support frame (441); The filtering assembly (45) comprises a limiting sleeve plate (451), an installation frame (452), a sealing plate (453), a filter screen (454) and a handle (455), wherein, The limiting sleeve plate (451) is fixedly connected to the inner wall of the feed shell (431) on both sides, the installation frame (452) is slidingly clamped on the inner wall of the limiting sleeve plate (451), and the filter screen (454) is clamped on the inner wall of the installation frame (452); One end of the installation frame (452) slidingly penetrates the outer wall of the feed shell (431) and is fixedly connected with one side of the sealing plate (453), and the handle (455) is fixedly connected to the other side of the sealing plate (453); The flow self-adjusting assembly (46) comprises a limiting rod (461), a conical head (462) and a supporting spring (463), wherein, One end of the limiting rod (461) is fixedly connected to the bottom of the limiting top plate (443), the other end of the limiting rod (461) is slidably penetrated through the top of the injection pipeline (442), and is fixedly connected with one end of the conical head (462); after the wastewater is injected into the injection pipeline (442), the conical head (462) is impacted, when the fluid flow rate decreases, the pressure decreases, the flow passage opening decreases, the flow rate increases, the flow passage opening increases, and the feeding speed is accurately controlled; The supporting spring (463) is sleeved on the outer wall of the limiting rod (461).

2. The MVR evaporative crystallizer of claim 1, wherein, The steam preheating assembly (5) comprises a preheating shell (51), a pump body (52), an output pipeline (53), an input pipeline (54) and a spiral pipeline (55), wherein, The preheating shell (51) is fixedly connected to the outer wall of the evaporative crystallizer body (1), and the pump body (52) is installed on the top of the preheating shell (51); The pump body (52) and the injection pipeline (442) are provided with the output pipeline (53) and are connected through the output pipeline (53); The steam pipeline (41) and the bottom of the preheating shell (51) are provided with the input pipeline (54) and are connected through the input pipeline (54); The spiral pipeline (55) is located on the inner wall of the preheating shell (51), and one end of the spiral pipeline (55) is fixedly connected with the end of the input pipeline (54).

3. The MVR evaporative crystallizer of claim 2, wherein, The outer wall of the feeding shell (431) is provided with an inspection cover plate (4311) through bolts, the outer wall of the inspection cover plate (4311) is fixedly connected with a protective sleeve plate (4312), and the protective sleeve plate (4312) is slidably sleeved on the outer wall of the sealing plate (453).

4. The MVR evaporative crystallizer of claim 3, wherein, The inner wall of the feeding shell (431) is provided with a discharge port, the outer wall of the evaporative crystallizer body (1) is provided with a through groove matched with the discharge port, and the discharge port is located at the bottom of the filter screen (454).

5. The MVR evaporative crystallizer of claim 4, wherein, The outer wall of the input pipeline (54) is provided with an electromagnetic valve (541).

6. A method of using an mvr evaporative crystallizer, implemented using an mvr evaporative crystallizer according to any one of claims 1-5, characterized in that, The method comprises the following steps: S1, preheat the wastewater, start the MVR evaporative crystallizer and its auxiliary system, ensure that all control systems are in normal operation, the steam generated during the operation of the evaporative crystallizer is introduced into the outer wall of the preheating bin, the recovered hot steam is used to heat the preheating bin, and the temperature inside the preheating bin is increased; S2, wastewater is injected into the preheating bin, and the wastewater to be treated is transported to the preheating bin through a special pipeline, in the preheating bin, the wastewater absorbs heat, and its temperature gradually increases, which preheats the wastewater for the subsequent evaporation process; S3, the wastewater is transported to the evaporative crystallizer, the preheated wastewater is transported to the evaporative crystallizer through the pipeline connecting the preheating bin and the evaporative crystallizer, and the flow self-adjusting assembly (46) is used to adjust the flow of the wastewater flowing into the evaporative crystallizer, so as to ensure that the feeding speed is appropriate; S4, the evaporation process, the wastewater is heated and evaporated in the evaporative crystallizer, the water is evaporated and removed, and the concentrated residual substances are left. S5, crystallization and discharge, as evaporation proceeds, the concentration of dissolved solids in the solution increases, and crystallization begins, with concentrated liquor and crystals being discharged from the bottom of the evaporator for further processing.

Images