CN116102109A - A high-salt wastewater resource recovery and reuse treatment process - Google Patents

Abstract

The invention belongs to the technical field of wastewater treatment, in particular to a high-salt wastewater recycling and reutilizing treatment process, which comprises the following steps: performing primary filtration and flocculation treatment on the high-salt wastewater, and performing evaporation concentration by using a recovery device to obtain concentrated crystal slurry and distilled water; performing solid-liquid separation on the crystal slurry to obtain salt crystals and mother liquor; the mother liquor is added again and enters a recovery device for evaporation concentration; the recovery device comprises a tank body, an upper cover is arranged on the tank body, a rotating shaft is arranged in the tank body, a stirring sheet is arranged on the rotating shaft, a scraping plate is arranged on the rotating shaft through a connecting rod, and a groove is formed in the side surface, facing the inner wall of the tank body, of the scraping plate; the invention has simple structure, can remove salt crystals or salt scales attached to the inner wall of the tank body, is convenient for subsequent staff to clean the recovery device, and improves the precipitation rate and the extraction amount of waste salt, thereby improving the recycling rate of waste salt resources in wastewater.

Description

A high-salt wastewater resource recovery and reuse treatment process

technical field

The invention belongs to the technical field of waste water treatment, and specifically relates to a high-salt waste water recycling and reuse treatment process.

Background technique

Wastewater treatment is to use physical, chemical and biological methods to treat wastewater, separate pollutants in wastewater or convert them into harmless substances, purify wastewater, reduce pollution, and achieve wastewater recycling, reuse, and full utilization. Water resources, in addition, the salt resources precipitated in the wastewater can also be reused, reducing waste and environmental pollution from high-salt wastewater.

When the existing waste water recovery waste salt device is in use, a large amount of salt scale is attached to the inner wall of the device. The attached salt scale affects the transfer of heat, reduces the precipitation efficiency of waste salt, and the attached salt scale affects the staff's understanding of the waste salt. The amount taken out reduces the utilization rate of waste salt.

At the same time, after the waste salt is precipitated, the staff need to clean up the waste salt recovery device. The existing cleaning method is mainly pickling. During the cleaning process, if there is a lot of salt scale attached to the inner wall of the recovery device, In order to ensure that there is no dirt attached to the inner wall of the evaporator, the staff needs to clean it repeatedly, which is inconvenient.

Contents of the invention

In order to make up for the shortcomings of the existing technology, the salt crystallization or salt scale attached to the inner wall of the tank is removed, which is convenient for the subsequent staff to clean up the recovery device, and improves the precipitation rate and extraction amount of waste salt, thereby increasing the waste salt in wastewater. In order to improve the reuse rate of resources, the present invention proposes a high-salt wastewater resource recovery and reuse treatment process.

The technical solution adopted by the present invention to solve the technical problem is: a high-salt wastewater resource recovery and reuse treatment process described in the present invention, the process includes the following steps:

After preliminary filtration and flocculation treatment of high-salt wastewater, the recovery device is used for evaporation and concentration to obtain concentrated crystal slurry and distilled water;

The crystal slurry is subjected to solid-liquid separation to obtain salt crystals and mother liquor;

The mother liquor is re-added into the recovery device for evaporation and concentration;

The recovery device includes a tank body, a top cover is installed on the tank body, a rotating shaft is installed in the tank body, a stirring blade is installed on the rotating shaft, a motor is installed on the upper cover, and the motor drives the rotating shaft to carry out movement, the upper cover is equipped with a steam pipe, and the tank body is equipped with a feed pipe and a discharge pipe; the distilled water is obtained by cooling the steam discharged from the steam pipe on the recovery device; the mother liquor is obtained by using the steam pipe The steam flowing in the tank is heated up after heat exchange and then re-added to the recovery device; a scraper is installed on the rotating shaft through a connecting rod, and the scraper is closely attached to the inner wall of the tank, and the scraper faces the inner wall of the tank. A groove is provided on the side surface, and the height of the side wall located in front of the groove in the moving direction of the scraper is lower than the height of the side wall on the other side of the groove.

Preferably, bristles are installed on the side wall of the groove, the bristles are located on the front side wall in the forward direction of the scraper, and the bristles contact the inner wall of the tank.

Preferably, a cutter is installed on the scraper, the cutters are parallel to each other, the cutter is close to the inner wall of the tank body, the cutter and the bristles are located on the same side, the cutter Located in front of the bristles.

Preferably, the stirring piece pushes the liquid in the tank to move downward, a circular plate is installed on the rotating shaft, the circular plate is located below the stirring piece, and passing holes are evenly opened on the circular plate, and the passing holes The diameter is larger than the diameter of the salt crystals that appear in the tank.

Preferably, an annular groove is installed on the inner wall of the tank body, a closed space is formed between the annular groove and the inner wall of the tank body, a through hole is opened on the lower surface of the annular groove, and the concave groove on the scraper The groove is aligned with the through hole, and the feed pipe communicates into the closed space.

Preferably, the upper cover and the tank body are connected to each other through bolts, the output shaft of the motor and the rotating shaft are threaded through a fixed sleeve, and a positioning block is installed on the bottom surface of the tank body, and the positioning block is inserted into on the lower end of the shaft.

Preferably, the connecting rod includes a movable part and a fixed part, and the fixed part is installed on the rotating shaft, and a mounting hole is opened on the fixed part, and a connecting spring is installed in the mounting hole, and the mounting hole is slidably installed There is a moving rod, the other end of the moving rod is connected to the movable part, and the two ends of the connecting spring are fixedly connected to the bottom surface of the mounting hole and the end face of the moving rod respectively.

Preferably, the connection spring is made of memory metal, and the scraper contacts and clings to the inner wall of the tank after the temperature of the connection spring exceeds its threshold.

The beneficial effects of the present invention are as follows:

1. A high-salt wastewater resource recovery and reuse treatment process according to the present invention, by setting a rotating shaft, a positioning block, a connecting spring and a fixing sleeve, it is convenient for the staff to disassemble, clean and reinstall the recovery device, avoiding the recovery of the recovery device. The dead corner of the structure inside is not easy to be cleaned, which affects the subsequent normal use of the recovery device.

2. A high-salt wastewater resource recovery and reuse treatment process according to the present invention, by setting scrapers, grooves, cutters and bristles, the salt crystals attached to the inner wall of the tank are cleaned, and the cleaned salt The crystals quickly arrive at the discharge pipe and are discharged, avoiding the salt crystals reattaching to the inner wall of the tank, affecting the heat exchange of the liquid in the tank and the precipitation efficiency of the waste salt of the salt crystals and the amount of waste salt taken out by the staff, thereby improving the high efficiency. Utilization of waste salt in saline wastewater.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the front view of the recovery device used in the treatment process of the present invention;

Fig. 2 is the sectional view of the recovering device used in the treatment process of the present invention;

Fig. 3 is the structural representation of the scraper in the recycling device used in the treatment process of the present invention;

Fig. 4 is the structural representation of connecting rod in the recovery device used in the treatment process of the present invention;

Fig. 5 is the structural representation of the ring groove in the recycling device used in the treatment process of the present invention;

Fig. 6 is a partial enlarged view of place A in Fig. 2;

Fig. 7 is a partial enlarged view of place B in Fig. 2;

Fig. 8 is a partial enlarged view at C in Fig. 3;

Fig. 9 is a flow chart of the steps of the treatment process of the present invention;

In the figure: tank body 1, positioning block 11, discharge pipe 12, feed pipe 13, heating coil 14, upper cover 2, motor 21, fixed sleeve 211, steam pipe 22, rotating shaft 3, stirring plate 31, circular Plate 32, scraper 4, bristles 41, cutter 42, connecting rod 5, movable part 51, fixed part 52, moving rod 53, connecting spring 54, ring groove 6, through hole 61.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figures 1 to 9, a high-salt wastewater resource recovery and reuse treatment process according to the present invention comprises the following steps:

After preliminary filtration and flocculation treatment of high-salt wastewater, the recovery device is used for evaporation and concentration to obtain concentrated crystal slurry and distilled water; Remove the larger impurities contained in the wastewater and reduce the difficulty of subsequent treatment. At the same time, by adding flocculants or using other physical means to treat the high-salt wastewater, the suspended solids contained in the wastewater are also removed as much as possible, so that The waste water is relatively pure, which ensures that the subsequent evaporation and concentration will not be affected by impurities or suspended solids contained in the waste water, which will cause the recovery device to fail to work normally. Resource utilization, reduce waste;

The crystal slurry is subjected to solid-liquid separation to obtain salt crystals and mother liquor;

The mother liquor is re-added into the recovery device for evaporative concentration; by re-adding the filtered mother liquor into the recovery device for evaporative concentration, the salt contained in the waste water can be effectively and fully separated, so that the recovered salt Reuse, improve resource utilization, and reduce environmental pollution;

Described recovery device comprises tank body 1, and upper cover 2 is installed on described tank body 1, and rotating shaft 3 is installed in described tank body 1, and agitating plate 31 is installed on described rotating shaft 3, and described upper cover 2 is installed There is a motor 21, and the motor 21 drives the rotating shaft 3 to move, the steam pipe 22 is installed on the upper cover 2, and the feed pipe 13 and the discharge pipe 12 are installed on the tank body 1; when the recovery device is working, the motor 21 will drive the rotating shaft 3 to move, and then make the stirring plate 31 on the rotating shaft 3 move synchronously, and stir the liquid in the tank body 1 to make it relatively uniform, which is conducive to evaporation and concentration;

The distilled water is obtained by cooling the steam discharged from the steam pipe 22 on the recovery device; the mother liquor is re-added to the recovery device after being heated by the steam flowing in the steam pipe 22 through heat exchange; , will generate a certain amount of water vapor, and by cooling the water vapor, distilled water that can be reused is obtained, which improves the utilization rate of resources and reduces the waste of water resources. Heating is carried out to ensure that the temperature of the mother liquor is relatively high, so as to prevent the mother liquor with a lower temperature from being re-added into the recovery device, which will affect the normal operation of the recovery device. At the same time, the mother liquor is heated by water vapor to improve the secondary use of heat , to avoid the heat in the water vapor from being directly emitted to the environment, causing waste;

A scraper 4 is installed on the rotating shaft 3 through a connecting rod 5, and the scraper 4 is closely attached to the inner wall of the tank body 1, and a groove is opened on the side of the scraper 4 facing the inner wall of the tank body 1, and the groove The height of the side wall of the groove located in front of the moving direction of the scraper 4 is lower than the height of the side wall on the other side of the groove;

When the recovery device is in use, the scraper 4 connected to the rotating shaft 3 will also move along the inner wall of the tank 1, and the salt adhered on the inner wall of the tank 1 will be crystallized by the contact between the scraper 4 and the inner wall of the tank 1 Clear it down, so as to avoid the high-salt wastewater in the tank 1 splashing on the inner wall above the liquid level when the recovery device is working, resulting in salt crystals and attaching to the inner wall of the tank 1, which affects the collection of salt crystals and subsequent recovery. At the same time, after the crystals produced by the evaporation and concentration of high-salt wastewater adhere to the inner wall of the tank body 1, they can also be cleaned by the scraper 4, so as to further avoid the attachment of salt crystals or salt scale on the inner wall of the tank body 1, which will affect the high The heat exchange between the brine waste water and the heating coil 14 in the inner wall of the tank body 1 causes potential safety hazards and threatens the normal operation of the recovery device. cleaning, to ensure the precipitation efficiency of waste salt in high-salt wastewater, as well as the amount of waste salt taken out by the staff, and to improve the utilization rate of waste salt in salt wastewater. At the same time, through the groove set on the scraper 4, the scraped The salt crystals or salt scale cleaned by the plate 4 from the inner wall of the tank body 1 will enter the groove and move down along the groove. In addition, since the lower end of the scraper 4 is close to the discharge pipe 12 on the tank body 1, So that the salt crystallization or salt scale falling along the groove will directly reach the vicinity of the discharge pipe 12, and then be discharged from the discharge pipe 12 to the outside of the recovery device relatively quickly, preventing the scraper 4 from being removed from the inner wall of the tank body 1 Salt crystallization or salt scale stays inside the tank body 1 for a long time, causing it to re-contact and reattach to the inner wall of the tank body 1, affecting the normal operation of the recovery device.

As an embodiment of the present invention, bristles 41 are installed on the side wall of the groove, and the bristles 41 are located on the front side wall in the forward direction of the scraper 4, and the bristles 41 contact the inner wall of the tank body 1;

By setting the bristles 41 on the relatively low side wall of the groove, a relatively closed space or channel is formed between the groove, the bristles 41 and the inner wall of the tank body 1, so that the inner wall of the tank body 1 is cleaned The salt crystals or salt scale can smoothly drop along the groove to the vicinity of the discharge pipe 12, avoiding the salt crystals or salt scale moving along the groove from leaving the groove due to the influence of the liquid flow in the tank body 1, and at the same time , because the bristles 41 are relatively soft, when the scraper 4 rotates along the inner wall of the tank body 1, the bristles 41 can pass over the salt crystals or salt scales that exist on the inner wall of the tank body 1, so that the salt crystals or salt scales are relatively high on the groove. The high side wall is scraped off so that the salt crystals or salt scale are scraped off and directly enter the groove. At the same time, through the contact between the bristles 41 and the inner wall of the tank body 1, the bristles 41 can be used to clean the inner wall of the tank body 1. Clean up the attached relatively small salt crystals and weakly attached salt crystals, make them fall into the liquid in the tank 1, and then continue to crystallize and increase its volume, so that after it is subsequently discharged with the crystal paddle, It can be separated by filtration to improve the separation effect on crystal paddles.

As an embodiment of the present invention, a cutter 42 is installed on the scraper 4, the cutters 42 are parallel to each other, the cutter 42 is close to the inner wall of the tank body 1, the cutter 42 Located on the same side as the bristles 41, the cutter 42 is located in front of the bristles 41;

The cutter 42 on the scraper 4 will cut and slide the salt crystals or salt scale attached to the inner wall of the tank body 1 before the scraper 4 passes by, so that the subsequent scraper 4 will remove the salt crystals or salt scale attached to the inner wall of the tank body 1 . Salt crystals or salt scales are cleaned up to avoid too close adhesion between salt crystals or salt scales and the inner wall of the tank body 1, which affects the normal operation of the scraper 4. At the same time, since the cutter 42 is distributed in parallel on the scraper 4, the When the salt crystals or salt scales on the inner wall of the tank body 1 are cut, the salt crystals or salt scales after cutting will be relatively small, which is beneficial to remove the salt crystals or salt scales when the scraper 4 passes through, avoiding or reducing Salt crystallization or salt scale adheres to the inner wall of the tank body 1, which is beneficial to the normal operation of the recovery device and subsequent cleaning of the recovery device.

As an embodiment of the present invention, the stirring piece 31 pushes the liquid in the tank body 1 to move downward, and a circular plate 32 is installed on the rotating shaft 3, and the circular plate 32 is located below the stirring piece 31. Pass holes are evenly opened on the plate 32, and the diameter of the pass holes is larger than the diameter of the salt crystals appearing in the tank body 1;

When the recovery device is working, the stirring plate 31 on the rotating shaft 3 will stir the liquid in the tank body 1, so that the liquid in the tank body 1 moves downwards, and at the same time, the circular plate 32 arranged on the rotating shaft 3 makes the liquid in the tank body 1 move downward. The liquid moving downward under the action of the stirring piece 31 is blocked, so that the liquid flows around in the tank body 1, thereby avoiding as far as possible the unidirectional stirring of the stirring piece 31 in the tank body 1 and causing eddy currents to be generated in the liquid in the tank body 1, so that The accumulation of salt or other impurities in the liquid is not conducive to the further evaporation and concentration of waste water, and affects the normal operation of the recovery device. At the same time, there are evenly opened holes on the circular plate 32, which can make the liquid in the tank 1 to a certain extent Passing through the circular plate 32 ensures that there is mutual communication between the upper and lower parts of the liquid in the tank body 1, so that the components of the liquid in the tank body 1 are relatively uniform, which is conducive to evaporation and concentration.

As an embodiment of the present invention, a ring groove 6 is installed on the inner wall of the tank body 1, a closed space is formed between the ring groove 6 and the inner wall of the tank body 1, and a There is a through hole 61, the groove on the scraper 4 is aligned with the through hole 61, and the feed pipe 13 is connected to the closed space;

Since the feed pipe 13 is connected to the closed space formed between the annular groove 6 and the inner wall of the tank body 1, the high-salt wastewater or re-added mother liquor sent from the feed pipe 13 will first enter the closed space, and then Then flow down from the through hole 61. In the process, the high-salt waste water discharged in the through hole 61 or the mother liquor added again will flow down along the inner wall of the tank body 1, to a certain extent, it will affect the inner wall of the tank body 1. The attached salt crystallization or salt scale produces a flushing effect, making it leave the inner wall of the tank body 1, reducing the working pressure of the scraper 4, and at the same time, the liquid flowing down the inside of the tank body 1 will more easily contact with the heating plate in the inner wall of the tank body 1 Heat exchange occurs in the tube 14, which improves the effect and efficiency of evaporation and concentration. At the same time, because the upper end of the scraper 4 and the lower surface of the ring groove 6 are in close contact with each other, during the movement of the scraper 4, the liquid discharged from the through hole 61 will Entering into the groove on the scraper 4, it has a flushing effect on the salt crystallization or salt scale existing in the groove, so that the salt crystallization or salt scale in the groove can reach the bottom of the tank body 1 smoothly, avoiding salt scale Or salt crystallization occurs congestion in the groove, which affects the normal operation of the groove. At the same time, because the side wall of the groove is equipped with bristles 41, when the liquid discharged in the through hole 61 rushes into the groove, the liquid will Gradually exchange with the liquid in the tank body 1 from the bristles 41 to prevent this part of the liquid from directly reaching the discharge pipe 12 at the bottom of the tank body 1 and being discharged, which will affect the working effect of the recovery device.

As an embodiment of the present invention, the upper cover 2 and the tank body 1 are connected to each other by bolts, the output shaft of the motor 21 and the rotating shaft 3 are screwed through the fixing sleeve 211, and the bottom surface of the tank body 1 A positioning block 11 is installed, and the positioning block 11 is inserted into the lower end surface of the rotating shaft 3;

When cleaning the recovery device, the staff loosens the bolts between the upper cover 2 and the tank body 1, so that the upper cover 2 is separated from the tank body 1, and then, by rotating the fixing sleeve 211 or the rotating shaft 3, the The separation between the upper cover 2 and the rotating shaft 3 is convenient for the staff to separate the upper cover 2, the tank body 1 and the rotating shaft 3, so as to clean the recovery device. And the positioning block 11 is inserted into the lower end surface of the rotating shaft 3. When using the recovery device, the staff first puts the rotating shaft 3 into the tank body 1, and makes the rotating shaft 3 and the positioning block 11 match each other. The upper cover 2 of the motor 21 is placed above the tank body 1, the rotating shaft 3 and the output shaft of the motor 21 are connected to each other, and then the upper cover 2 and the tank body 1 are fixed to each other by bolts to complete the reassembly of the recovery device. The cooperation between the block 11 and the rotating shaft 3 prevents the position of the rotating shaft 3 from being inconvenient to control when the recovery device is reassembled, which affects the normal operation of the staff and increases the installation difficulty of the recovery device.

As an embodiment of the present invention, the connecting rod 5 includes a movable part 51 and a fixed part 52, the fixed part 52 is mounted on the rotating shaft 3, and a mounting hole is opened on the fixed part 52, and a mounting hole is installed in the mounting hole. There is a connecting spring 54, a moving rod 53 is slidably installed in the mounting hole, the other end of the moving rod 53 is connected to the movable part 51, and the two ends of the connecting spring 54 are fixedly connected to the bottom surface of the mounting hole and the moving part respectively. the end face of the rod 53;

Because the scraper 4 is installed on the rotating shaft 3 through the connecting rod 5, at the same time, the movable part 51 on the connecting rod 5 is connected with the fixed part 52 through the connecting spring 54 and the moving rod 53 between the two, so that the connecting spring 54 Under the action, the scraper 4 is closely attached to the inner wall of the tank body 1, effectively removing the salt crystals or salt scale attached to the inner wall of the tank body 1. At the same time, due to the action of the connecting spring 54, when the scraper 4 touches the salt When the crystallization or salt scale is too closely bonded to the inner wall of the tank body 1, the scraper 4 will move to pass over the salt crystallization or salt scale, preventing the scraper 4 from forcibly removing the salt crystallization or salt scale, resulting in scraping Plate 4 or other components in the recovery device are damaged, which affects the normal use of the recovery device.

As an embodiment of the present invention, the connection spring 54 is made of memory metal, and the scraper 4 contacts and clings to the inner wall of the tank body 1 after the temperature of the connection spring 54 exceeds its threshold value;

Because the connection spring 54 is made of memory metal, before the recovery device is used, the temperature of the connection spring 54 is relatively low, and the establishment makes the distance between the scraper 4 and the rotating shaft 3 relatively close. When the staff reassembles the recovery device, There is a relatively large distance between the scraper 4 and the inner wall of the tank body 1, which is convenient for the staff to put the rotating shaft 3 and the scraper 4 into the inside of the tank body 1, thereby facilitating the staff to reassemble the recovery device. When the device is working, its internal temperature is relatively high, so that the temperature of the connecting spring 54 gradually exceeds its deformation threshold, and then pushed by the connecting spring 54, the scraper 4 moves away from the rotating shaft 3, ensuring that the scraper 4 4 and the inner wall of the tank body 1 are in close contact with each other, thereby cleaning the salt crystallization or salt scale attached to the inner wall of the tank body 1 .

The specific workflow is as follows:

Before the high-salt wastewater is recycled and reused, the high-salt wastewater is initially filtered, and at the same time, the suspended solids contained in the wastewater are also eliminated as much as possible by adding flocculants or other physical means to the high-salt wastewater. Possible removal, at the same time, the distilled water obtained after evaporation and concentration is recovered and used in production again;

By re-adding the filtered mother liquor to the recovery device for evaporation and concentration, the salt contained in the wastewater is separated, and the recovered salt is reused;

When the recovery device is working, the motor 21 will drive the rotating shaft 3 to move, and then the stirring plate 31 on the rotating shaft 3 will move synchronously, stirring the liquid in the tank body 1 to make it relatively uniform, which is conducive to evaporation and concentration;

When the recovery device performs evaporation and concentration treatment, a certain amount of water vapor will be generated. By cooling the water vapor, reusable distilled water can be obtained. At the same time, the heat contained in the water vapor will heat the filtered mother liquor through heat exchange. , to ensure that the temperature of the mother liquor is relatively high, and at the same time, use water vapor to heat the mother liquor to improve the secondary utilization of heat;

When the recovery device is in use, the scraper 4 connected to the rotating shaft 3 will also move along the inner wall of the tank 1, and the salt adhered on the inner wall of the tank 1 will be crystallized by the contact between the scraper 4 and the inner wall of the tank 1 At the same time, after the crystals produced by the evaporation and concentration of high-salt wastewater adhere to the inner wall of the tank body 1, they can also be cleaned by the scraper 4 to further avoid salt crystals or salt scale attached to the inner wall of the tank body 1, which will affect the high-salt water quality. Heat exchange between the waste water and the heating coil 14 in the inner wall of the tank body 1. In addition, the salt crystallization or salt scale attached to the inner wall of the tank body 1 is cleaned by the scraper 4 to ensure the precipitation efficiency of waste salt in the high-salt wastewater. As well as the amount of waste salt taken out by the staff, the utilization rate of waste salt in the brine waste water is improved. At the same time, through the grooves arranged on the scraper 4, the salt cleaned by the scraper 4 from the inner wall of the tank body 1 is crystallized or Salt scale will enter in the groove, and move down along the groove, in addition, because the lower end of scraper 4 is close to discharge pipe 12 on the tank body 1, the salt crystallization or salt scale falling along the groove will directly Arrive at the vicinity of the discharge pipe 12, and then be discharged from the discharge pipe 12 to the outside of the recovery device relatively quickly;

By setting the bristles 41 on the relatively low side wall of the groove, a relatively closed space or channel is formed between the groove, the bristles 41 and the inner wall of the tank body 1, so that the inner wall of the tank body 1 is cleaned The salt crystals or salt scales in the tank can smoothly fall along the groove to the vicinity of the discharge pipe 12, so as to avoid the salt crystals or salt scale moving along the groove from being affected by the liquid flow in the tank body 1 halfway and leaving the groove;

The cutter 42 on the scraper 4 will cut and slide the salt crystals or salt scale attached to the inner wall of the tank body 1 before the scraper 4 passes by, so that the subsequent scraper 4 will remove the salt crystals or salt scale attached to the inner wall of the tank body 1 . The salt crystals or salt scales are cleaned up to avoid too tight adhesion between the salt crystals or salt scales and the inner wall of the tank body 1, which will affect the normal operation of the scraper 4;

When the recovery device is working, the stirring plate 31 on the rotating shaft 3 will stir the liquid in the tank body 1, so that the liquid in the tank body 1 moves downwards, and at the same time, the circular plate 32 arranged on the rotating shaft 3 makes the liquid in the tank body 1 move downward. The liquid moving downward under the action of the stirring piece 31 is blocked, so that the liquid flows around in the tank body 1, thereby avoiding as far as possible the unidirectional stirring of the stirring piece 31 in the tank body 1 and causing eddy currents to be generated in the liquid in the tank body 1, so that The accumulation of salt or other impurities in the liquid is not conducive to the further evaporation and concentration of waste water. At the same time, there are even holes on the circular plate 32, which can make the liquid in the tank 1 pass through the circular plate 32 to a certain extent, ensuring that the tank There is mutual communication between the upper and lower parts of the liquid in body 1;

Since the feed pipe 13 is connected to the closed space formed between the annular groove 6 and the inner wall of the tank body 1, the high-salt wastewater or re-added mother liquor sent from the feed pipe 13 will first enter the closed space, and then Then flow down from the through hole 61. In the process, the high-salt waste water discharged in the through hole 61 or the mother liquor added again will flow down along the inner wall of the tank body 1, to a certain extent, it will affect the inner wall of the tank body 1. The attached salt crystallization or salt scale produces a flushing effect, and at the same time, the liquid flowing down along the inside of the tank body 1 will more easily exchange heat with the heating coil 14 in the inner wall of the tank body 1, and at the same time, due to the upper end of the scraper 4 and the ring The lower surfaces of the grooves 6 are in close contact with each other. During the movement of the scraper 4, the liquid discharged from the through hole 61 will enter the groove on the scraper 4, which will cause salt crystallization or salt scale existing in the groove. The scouring effect makes the salt crystallization or salt scale in the groove reach the bottom of the tank body 1 smoothly;

When cleaning the recovery device, the staff loosens the bolts between the upper cover 2 and the tank body 1, so that the upper cover 2 is separated from the tank body 1, and then, by rotating the fixing sleeve 211 or the rotating shaft 3, the The separation between the upper cover 2 and the rotating shaft 3 is convenient for the staff to separate the upper cover 2, the tank body 1 and the rotating shaft 3, so as to clean the recovery device. And the positioning block 11 is inserted into the lower end surface of the rotating shaft 3. When using the recovery device, the staff first puts the rotating shaft 3 into the tank body 1, and makes the rotating shaft 3 and the positioning block 11 match each other. The upper cover 2 of the motor 21 is placed above the tank body 1, the rotating shaft 3 and the output shaft of the motor 21 are connected to each other, and then the upper cover 2 and the tank body 1 are fixed to each other by bolts to complete the reassembly of the recovery device;

Because the scraper 4 is installed on the rotating shaft 3 through the connecting rod 5, at the same time, the movable part 51 on the connecting rod 5 is connected with the fixed part 52 through the connecting spring 54 and the moving rod 53 between the two, so that the connecting spring 54 Under the action, the scraper 4 is closely attached to the inner wall of the tank body 1. At the same time, due to the action of the connecting spring 54, when the scraper 4 encounters salt crystals or the adhesion between the salt scale and the inner wall of the tank body 1 is too tight, The scraper 4 moves over the salt crystals or scale;

Because the connection spring 54 is made of memory metal, before the recovery device is used, the temperature of the connection spring 54 is relatively low, and the establishment makes the distance between the scraper 4 and the rotating shaft 3 relatively close. When the staff reassembles the recovery device, There is a relatively large distance between the scraper 4 and the inner wall of the tank body 1, which is convenient for the staff to put the rotating shaft 3 and the scraper 4 into the tank body 1. At the same time, when the recovery device is working, the internal temperature is relatively high , so that the temperature of the connecting spring 54 gradually exceeds its deformation threshold, and then under the push of the connecting spring 54, the scraper 4 moves away from the rotating shaft 3, ensuring that the scraper 4 and the inner wall of the tank body 1 are in close contact with each other .

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A high-salinity wastewater recycling treatment process comprises the following steps:

performing primary filtration and flocculation treatment on the high-salt wastewater, and performing evaporation concentration by using a recovery device to obtain concentrated crystal slurry and distilled water;

performing solid-liquid separation on the crystal slurry to obtain salt crystals and mother liquor;

the mother liquor is added again and enters a recovery device for evaporation concentration;

the recovery device comprises a tank body (1), an upper cover (2) is arranged on the tank body (1), a rotating shaft (3) is arranged in the tank body (1), a stirring sheet (31) is arranged on the rotating shaft (3), a steam pipe (22) is arranged on the upper cover (2), and a feed pipe (13) and a discharge pipe (12) are arranged on the tank body (1);

the method is characterized in that: the distilled water is obtained by cooling the steam discharged from a steam pipe (22) on the recovery device; the mother liquor is added into the recovery device again after heat exchange and temperature rise are carried out by utilizing steam flowing in the steam pipe (22);

the scraper (4) is mounted on the rotating shaft (3) through a connecting rod (5), the scraper (4) is tightly attached to the inner wall of the tank body (1), a groove is formed in the side surface of the scraper (4) facing the inner wall of the tank body (1), and the height of the side wall of the groove, which is positioned at the front part in the moving direction of the scraper (4), is lower than that of the side wall of the other side of the groove;

the side wall of the groove is provided with bristles (41), the bristles (41) are positioned on the side wall in front of the scraper (4) in the advancing direction, and the bristles (41) are contacted with the inner wall of the tank body (1).

2. The high-salinity wastewater recycling treatment process according to claim 1, which is characterized in that: the scraping plate (4) is provided with cutters (42), the cutters (42) are parallel to each other, the cutters (42) are tightly attached to the inner wall of the tank body (1), the cutters (42) and the bristles (41) are located on the same side face, and the cutters (42) are located in front of the bristles (41).

3. The high-salinity wastewater recycling treatment process according to claim 1, which is characterized in that: the stirring blade pushes liquid in the tank body (1) to move downwards, a circular plate (32) is arranged on the rotating shaft (3), the circular plate (32) is positioned below the stirring blade, and through holes are uniformly formed in the circular plate (32).

4. The recycling and reutilizing treatment process for high-salinity wastewater, which is characterized by comprising the following steps of: the novel scraper is characterized in that an annular groove (6) is arranged on the inner wall of the tank body (1), a closed space is formed between the annular groove (6) and the inner wall in the tank body (1), a through hole (61) is formed in the lower surface of the annular groove (6), a groove on the scraper (4) is aligned with the through hole (61), and the feeding pipe (13) is communicated into the closed space.

5. The high-salinity wastewater recycling treatment process according to claim 1, which is characterized in that: the upper cover (2) is connected with the tank body (1) through bolts, an output shaft of the motor (21) is connected with the rotating shaft (3) through a fixing sleeve (211) through threads, a positioning block (11) is arranged on the bottom surface of the tank body (1), and the positioning block (11) is inserted into the lower end surface of the rotating shaft (3).

6. The recycling treatment process for high-salinity wastewater according to claim 5, which is characterized in that: connecting rod (5) are including movable part (51) and fixed part (52), fixed part (52) are installed on pivot (3), the mounting hole has been seted up on fixed part (52), install connecting spring (54) in the mounting hole, movable rod (53) are installed to the downthehole slip of mounting, the other end of movable rod (53) is connected on movable part (51), the both ends of connecting spring (54) link firmly respectively on the bottom surface of mounting hole and the terminal surface of movable rod (53).

7. The recycling and reutilizing treatment process of high-salt wastewater, which is characterized in that: the connecting spring (54) is made of memory metal, and the scraping plate (4) is contacted and clung to the inner wall of the tank body (1) after the temperature of the connecting spring (54) exceeds the threshold value.

Images