MVR (mechanical vapor recompression) evaporator concentrated water treatment equipment

Abstract

The utility model relates to the technical field of concentrated water treatment, and discloses concentrated water treatment equipment for an MVR (mechanical vapor recompression) evaporator, which comprises a bottom plate, and a defoaming net and a partition plate which are arranged in a separator and are used for eliminating material foams. The motor drives the scraping block to rotate, the scraping block scrapes dirt and residual liquid accumulated on the surface of the defoaming net, meanwhile, the water pump pumps a water source in the water tank, and the water source is guided to the spray head through the flow dividing pipe to flush the defoaming net, so that the maintenance convenience of the defoaming net is improved; when the bubble detector detects that the bubble amount exceeds a set threshold value, an early warning signal is immediately sent to the central controller, the flow regulating valve automatically regulates the steam flow according to the bubble detection signal, and meanwhile, when serious bubbling abnormity is detected, the central controller controls the emergency cut-off valve to rapidly cut off steam supply. Materials are prevented from further entering the compressor, and therefore the possibility that the compressor is damaged due to bubbling and material channeling is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of concentrated water treatment, in particular to MVR evaporator concentrated water treatment equipment. Background Art

[0002] Brine refers to wastewater, sewage, and waste liquids generated during industrial production. It contains industrial materials, intermediates, and finished products lost with the water, as well as pollutants generated during the production process. MVR evaporators produce large amounts of brine during operation, necessitating brine treatment equipment to process and convert it into reclaimed water for recycling in industrial production.

[0003] During the use of existing MVR evaporator concentrated water treatment equipment, if the gas content in the liquid is too high or the dissolved gas is released during the evaporation process, bubbles will be formed. These bubbles accumulate in the separator and cause the system to shut down for protection. Therefore, a defoaming mechanism must be used in conjunction with the separator. Usually, the defoaming process is mainly performed by a defoaming filter. Since the mist contains various particles, the defoaming filter is prone to dirt and requires regular cleaning and maintenance. The defoaming filter is located inside the separator, which is very inconvenient for workers to clean and may even not be cleaned properly, thereby reducing the stability of the equipment operation. In addition, the compressor is the heart of the MVR system. Due to the influence of some ions and COD and other substances, as evaporation progresses, it is very easy for foaming and material crossflow to occur in the separation chamber during operation, causing the material to enter the compressor system along the secondary steam pipeline. This may cause the dynamic balance of the compressor to be unbalanced during high-speed operation, causing the compressor to surge and then be damaged and scrapped, increasing the cost of maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide an MVR evaporator concentrated water treatment device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an MVR evaporator concentrated water treatment device, comprising a base plate, a preheater, a plate heat exchanger, a separator, a compressor, a thickener, a centrifuge, and a mother liquor tank are arranged on the top of the base plate, a connecting pipe is connected to the top of the separator, and a secondary steam pipe is arranged on the outside of the separator, and further comprising:

[0006] A defoaming net and a partition are provided inside the separator for eliminating material foam. An exhaust assembly and a drain pipe for guiding steam are provided on the inner side of the partition. Four groups of support assemblies are provided in an annular shape at the bottom of the defoaming net to improve its stability. A cleaning assembly is provided on the top of the defoaming net. A water supply assembly is provided on the top of the separator. A flushing assembly for cleaning the defoaming net is provided at one end of the water supply assembly.

[0007] A bubble detector for monitoring bubble generation is provided on the inner side of the secondary steam pipe, and a flow regulating valve and an emergency shut-off valve are provided on the outer side of the secondary steam pipe.

[0008] Preferably, the exhaust assembly includes a delivery pipe arranged on the inner side of the partition, and an air inlet is opened on the outer side of the delivery pipe.

[0009] Preferably, the support assembly includes a damping rod fixed to the bottom of the defoaming net, and a spring is sleeved on the outer side of the damping rod.

[0010] Preferably, the cleaning assembly includes a motor arranged on the top of the separator, and a scraper is provided at the output end of the motor.

[0011] Preferably, the water supply assembly includes a water tank fixed to the top of the separator, and a water pump is provided on one side of the water tank.

[0012] Preferably, the flushing assembly includes a diverter pipe connected to the water outlet end of the water pump, and a plurality of nozzles are laterally arranged on the outer side of the diverter pipe.

[0013] Preferably, the other end of the connecting pipe is connected to the plate heat exchanger, and the other end of the secondary steam pipe is connected to the compressor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model drives the scraper to rotate by a motor, and the scraper scrapes off the dirt and residual liquid accumulated on the surface of the defoaming net. At the same time, the water pump draws water from the water tank and transports it to the diversion pipe through the water outlet. The water is guided to the nozzle via the diversion pipe and then sprayed out from the nozzle to flush the defoaming net. By cooperating with the cleaning component, the convenience of maintaining the defoaming net is improved. The bubble generation in the secondary steam is monitored in real time by the bubble detector. When it is detected that the bubble amount exceeds the set threshold, an early warning signal is immediately sent to the central controller. The flow regulating valve automatically adjusts the steam flow according to the bubble detection signal to reduce the risk of foaming material entering the compressor. At the same time, when serious foaming abnormality is detected, the central controller controls the emergency shut-off valve to quickly cut off the steam supply to prevent the material from further entering the compressor, thereby reducing the possibility of damage to the compressor due to foaming and material leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of the MVR evaporator concentrated water treatment equipment provided by the utility model;

[0017] Figure 2 A schematic diagram of the side structure of the bottom plate provided by the utility model;

[0018] Figure 3A schematic diagram of the cross-sectional structure of a separator provided by the utility model;

[0019] Figure 4 This is a schematic diagram of the exhaust assembly structure provided by the utility model.

[0020] In the figure: 1. Base plate; 2. Preheater; 3. Plate heat exchanger; 4. Separator; 5. Compressor; 6. Thickener; 7. Centrifuge; 8. Mother liquor tank; 9. Connecting pipe; 10. Secondary steam pipe; 11. Defoaming net; 12. Partition; 13. Exhaust assembly; 131. Delivery pipe; 132. Air inlet; 14. Drain pipe; 15. Support assembly; 151. Damping rod; 152. Spring; 16. Cleaning assembly; 161. Motor; 162. Scraper; 17. Water supply assembly; 171. Water tank; 172. Water pump; 18. Flushing assembly; 181. Nozzle; 182. Diverter pipe; 19. Bubble detector; 20. Flow regulating valve; 21. Emergency shut-off valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4As shown, an MVR evaporator concentrated water treatment equipment includes a base plate 1, and a preheater 2, a plate heat exchanger 3, a separator 4, a compressor 5, a thickener 6, a centrifuge 7 and a mother liquid tank 8 are arranged on the top of the base plate 1. By arranging the compressor 5, the secondary steam generated can be compressed to increase its temperature and pressure for recycling; the top of the separator 4 is connected to a connecting pipe 9, and the outside of the separator 4 is provided with a secondary steam pipe 10. It also includes: a defoaming net 11 and a partition 12 arranged inside the separator 4 for eliminating material foam , by setting up the defoaming net 11, which is made of multi-layer stainless steel mesh material, it can effectively intercept the mist and tiny droplets in the gas and ensure smooth gas circulation; by setting up the partition 12, it is convenient to separate the internal area of ​​the separator 4; the inner side of the partition 12 is provided with an exhaust component 13 and a drain pipe 14 for guiding the passage of steam. By setting up the drain pipe 14, it is convenient to make the mist and tiny droplets flow down along the surface of the defoaming net 11 under the action of gravity and discharge the separator 4 through the drain pipe 14; the bottom of the defoaming net 11 is provided with a ring Four groups of support components 15 are provided to improve its stability, a cleaning component 16 is provided on the top of the defoaming net 11, a water supply component 17 is provided on the top of the separator 4, and a flushing component 18 for cleaning the defoaming net 11 is provided at one end of the water supply component 17; a bubble detector 19 for monitoring bubble generation is provided on the inner side of the secondary steam pipe 10. By setting the bubble detector 19, the bubble generation situation can be monitored in real time. It uses ultrasonic, optical or conductivity methods to detect bubbles. When the bubble amount exceeds the set threshold, an early warning signal is immediately sent to the central controller. This is the existing technology and will not be described in detail here; a flow regulating valve 20 and an emergency shut-off valve 21 are respectively provided on the outer side of the secondary steam pipe 10. By setting the flow regulating valve 20, the steam flow can be automatically adjusted according to the bubble detection signal to reduce the risk of foaming material entering the compressor 5. This is the existing technology and will not be described in detail here; by setting the emergency shut-off valve 21, when serious foaming abnormality is detected, the central controller controls it to quickly cut off the steam supply to prevent the material from further entering the compressor 5.

[0023] The exhaust component 13 includes a delivery pipe 131 arranged on the inner side of the partition 12, and an air inlet 132 is opened on the outer side of the delivery pipe 131. By setting the exhaust component 13, the gas filtered by the defoaming net 11 enters the interior of the delivery pipe 131 through the air inlet 132, and then escapes from the other end of the delivery pipe 131 through the movement of the gas, thereby completing the gas-liquid separation under the action of the partition 12.

[0024] The support assembly 15 includes a damping rod 151 fixed to the bottom of the defoaming net 11. A spring 152 is provided on the outer side of the damping rod 151. By setting the support assembly 15, when the material falls from the connecting pipe 9, it will cause an impact on the defoaming net 11. The spring 152 supports the defoaming net 11 through its elastic force. The damping rod 151 can reduce the impact energy and prevent the defoaming net 11 from deformation or collapse, thereby providing stability for its use.

[0025] The cleaning component 16 includes a motor 161 arranged at the top of the separator 4, and a scraper 162 is provided at the output end of the motor 161. By setting the cleaning component 16, the motor 161 can drive the scraper 162 to rotate when it is started. When the scraper 162 rotates, the dirt and residual liquid accumulated on the surface of the defoaming net 11 are scraped off. By cooperating with the flushing component 18, the defoaming net 11 is cleaned, thereby improving the convenience of maintenance of the defoaming net 11.

[0026] The water supply assembly 17 includes a water tank 171 fixed on the top of the separator 4. A water pump 172 is provided on one side of the water tank 171. By setting the water supply assembly 17, the water pump 172 draws water from the inside of the water tank 171 through the water inlet end, and then transports it to the diversion pipe 182 through the water outlet end.

[0027] The flushing component 18 includes a diverter pipe 182 connected to the water outlet end of the water pump 172. Several nozzles 181 are horizontally arranged on the outside of the diverter pipe 182. By setting up the flushing component 18, the water source drawn by the water pump 172 is guided to the nozzle 181 through the diverter pipe 182, and then the water source is sprayed out from the nozzle 181 to flush the defoaming net 11.

[0028] The other end of the connecting pipe 9 is connected to the plate heat exchanger 3, and the other end of the secondary steam pipe 10 is connected to the compressor 5. By setting the secondary steam pipe 10, the steam filtered by the separator 4 is easily transported to the compressor 5 via the secondary steam pipe 10.

[0029] Working principle: During use, water is first preheated by the preheater 2 to increase the temperature of the wastewater. The preheated wastewater enters the plate heat exchanger 3 and is heated to boiling point in the heating chamber to generate a large amount of secondary steam. The secondary steam carries the solutes generated by the evaporation of the wastewater into the separator 4. In the separator 4, the secondary steam is separated from the concentrated liquid and continuously evaporates and concentrates in the separator 4. When the material is concentrated to a certain proportion, it is discharged into the thickener 6. After thickening in the thickener 6, it enters the centrifuge 7 from the lower discharge port for solid-liquid separation and finally enters the mother liquor tank 8. When the material is injected into the separator 4 from the connecting pipe 9, the defoaming net 11 intercepts the mist and tiny droplets in the gas, and at the same time the spring 152 supports the defoaming net 11 through its elastic force, and the damping rod 151 can reduce the impact energy generated by the falling material. The gas filtered by the defoaming net 11 enters the interior of the conveying pipe 131 through the air inlet 132, and then escapes from the other end of the conveying pipe 131 through the movement of the gas, thereby completing the gas-liquid separation under the action of the partition 12. The mist and tiny droplets flow down the surface of the defoaming net 11 under the action of gravity and are discharged from the separator 4 through the drain pipe 14. Then the secondary steam enters the secondary steam pipe 10, and the bubble detector 19 monitors the bubble generation in the secondary steam in real time. When it is detected that the bubble amount exceeds the set threshold, it immediately sends an early warning signal to the central controller, and the flow control valve 20 automatically adjusts the steam flow according to the bubble detection signal to reduce the risk of foaming material entering the compressor 5. At the same time, when serious foaming abnormality is detected, the central controller controls the emergency shut-off valve 21 to quickly cut off the steam supply to prevent the material from further entering the compressor 5, thereby reducing The possibility of the compressor 5 being damaged due to foaming and material leakage is reduced. When the defoaming net 11 needs to be cleaned, the motor 161 drives the scraper 162 to rotate, and the scraper 162 scrapes the dirt and residual liquid accumulated on the surface of the defoaming net 11. At the same time, the water pump 172 draws water from the water tank 171 and transports it to the diversion pipe 182 through the water outlet. The water is guided to the nozzle 181 through the diversion pipe 182 and then sprayed out from the nozzle 181 to flush the defoaming net 11. By cooperating with the cleaning component 16, the convenience of maintaining the defoaming net 11 is improved.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0031] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An MVR evaporator concentrated water treatment equipment, comprising a base plate (1), a preheater (2), a plate heat exchanger (3), a separator (4), a compressor (5), a thickener (6), a centrifuge (7) and a mother liquor tank (8) are arranged on the top of the base plate (1), a connecting pipe (9) is connected to the top of the separator (4), and a secondary steam pipe (10) is arranged on the outside of the separator (4), characterized in that: Also includes: A defoaming net (11) and a partition (12) are provided inside the separator (4) for eliminating material foam, an exhaust assembly (13) and a drain pipe (14) for guiding steam to pass through are provided on the inner side of the partition (12), four groups of support assemblies (15) are provided in an annular shape at the bottom of the defoaming net (11) to improve its stability, a cleaning assembly (16) is provided at the top of the defoaming net (11), a water supply assembly (17) is provided at the top of the separator (4), and a flushing assembly (18) for cleaning the defoaming net (11) is provided at one end of the water supply assembly (17); A bubble detector (19) for monitoring bubble generation is provided on the inner side of the secondary steam pipe (10), and a flow regulating valve (20) and an emergency shut-off valve (21) are provided on the outer side of the secondary steam pipe (10).

2. The MVR evaporator concentrated water treatment equipment according to claim 1, characterized in that: The exhaust assembly (13) comprises a delivery pipe (131) arranged on the inner side of the partition (12), and an air inlet (132) is provided on the outer side of the delivery pipe (131).

3. The MVR evaporator concentrated water treatment equipment according to claim 1, characterized in that: The support assembly (15) comprises a damping rod (151) fixed to the bottom of the defoaming net (11), and a spring (152) is sleeved on the outer side of the damping rod (151).

4. The MVR evaporator concentrated water treatment equipment according to claim 1, characterized in that: The cleaning assembly (16) comprises a motor (161) arranged on the top of the separator (4), and a scraper (162) is provided at the output end of the motor (161).

5. The MVR evaporator concentrated water treatment equipment according to claim 1, characterized in that: The water supply assembly (17) comprises a water tank (171) fixed to the top of the separator (4), and a water pump (172) is provided on one side of the water tank (171).

6. The MVR evaporator concentrated water treatment equipment according to claim 5, characterized in that: The flushing assembly (18) comprises a diverter pipe (182) connected to the water outlet of the water pump (172), and a plurality of spray heads (181) are arranged laterally on the outer side of the diverter pipe (182).

7. The MVR evaporator concentrated water treatment equipment according to claim 1, characterized in that: The other end of the connecting pipe (9) is in communication with the plate heat exchanger (3), and the other end of the secondary steam pipe (10) is in communication with the compressor (5).

Images