Multistage recovery process for hard alloy sand blasting waste water

Abstract

The invention discloses a hard alloy sand blasting wastewater multi-stage recovery process, which belongs to the technical field of wastewater recovery, and comprises the following steps: carrying out primary treatment on sand blasting wastewater through a wastewater collection pool, and then carrying out multi-stage filtration treatment; pretreated water is introduced into a first-stage recycling water tank after being subjected to first-stage filtering treatment, and can be used as water for urban landscaping, road sweeping and the like; pretreated water is introduced into a secondary reuse water tank after being subjected to secondary filtration treatment, and can be used as water for production and living of enterprises; pretreated water is introduced into a third-stage recycling water tank after being subjected to third-stage filtering treatment, and can be used as water for pure water, domestic drinking water and the like; the water treated in each stage of filtering stage can meet different water standards, so that the direct discharge of wastewater and the waste of water resources are effectively reduced, the recovery and cyclic utilization of the wastewater are realized, the pollution of the wastewater to the environment is reduced, and the operation cost of wastewater treatment by a sewage master station is reduced; and favorable conditions are created for metal resource recovery, and loss and waste of metal resources are avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wastewater recovery, and specifically relates to a multi-stage recovery process for hard alloy sandblasting wastewater. BACKGROUND

[0002] In the process of hard alloy machining, part of the workpieces need to be treated by sandblasting process due to surface oxidation or insufficient flatness to meet the requirements of subsequent coating, welding or finishing. At present, the sandblasting process is mainly divided into dry sandblasting and wet sandblasting, wherein the wet sandblasting uses corundum powder as the main abrasive to clean the surface of the workpiece, and a large amount of wastewater containing corundum powder and metal scraps (such as WC-Co particles) is generated, which needs to be treated.

[0003] Chinese patent CN205500985U discloses a complete set of equipment for sandblasting line wastewater treatment, which can remove the suspended solids in the wastewater by the processes of first-stage reaction tank, second-stage reaction tank and solid-liquid separation. However, the equipment can only remove the suspended solids in the wastewater, and the wastewater needs to be treated again or directly discharged in the sewage station, so that the water resource recycling rate is low, resulting in waste of part of the water resources; a large amount of wastewater enters the sewage station, which increases the treatment load of the sewage station and the operation cost of the sewage station; meanwhile, the hard alloy particles in the wastewater are not effectively recovered, resulting in loss and waste of metal resources.

[0004] Therefore, there is an urgent need for a multi-stage recovery process for hard alloy sandblasting wastewater, which can effectively recover and treat the sandblasting wastewater, and can make the recovered water suitable for the corresponding environment according to the recovery stage, and can create favorable conditions for metal resource recovery, so as to avoid the loss and waste of metal resources. SUMMARY

[0005] The purpose of the present application is to provide a multi-stage recovery process for hard alloy sandblasting wastewater to solve at least one aspect of the problems and defects in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A multi-stage recovery process for hard alloy sandblasting wastewater, comprising the following steps: S1, the sandblasting wastewater flows into a wastewater collection tank, and a medicament is continuously added to preliminarily remove the suspended solids in the wastewater to form pretreated water; S2, the pretreated water in the wastewater collection tank is returned to the wastewater collection tank after the turbidity and suspended solids of the wastewater are reduced by a sludge filter press, or the pretreated water in the wastewater collection tank directly flows into a recycled water pressurization system; S3, the recycled water pressurization system pressurizes and delivers the pretreated water to a first-stage filtration, and the pretreated water is introduced into a first-stage recycled water tank or flows into a second-stage filtration after the pretreated water is filtered by the first-stage filtration; S4, the pretreated water is introduced into a secondary reuse water tank or flows into a tertiary filter after secondary filtration; S5, the pretreated water is introduced into a tertiary reuse water tank after tertiary filtration.

[0007] The hard alloy sandblasting wastewater multistage recycling process according to the scheme of the application has at least the following technical effects: The hard alloy sandblasting wastewater multistage recycling process preliminarily processes the sandblasting wastewater through a wastewater collection tank and then processes the wastewater through multistage filtration; the pretreated water is introduced into a primary reuse water tank after primary filtration, and can be used for city greening, road cleaning and other water use; the pretreated water is introduced into a secondary reuse water tank after secondary filtration, and can be used for enterprise production and life and other water use; the pretreated water is introduced into a tertiary reuse water tank after tertiary filtration, and can be used for pure water, drinking and other water use; the water treated in each filtration stage can meet different water use standards, effectively reduces direct discharge of wastewater and waste of water resources, realizes recycling of wastewater, reduces environmental pollution caused by wastewater, and reduces operation cost of wastewater treatment in a sewage station; The wastewater is preliminarily processed and then processed through multistage filtration, so that metal scraps in the wastewater can be precipitated and enriched, which creates favorable conditions for metal resource recycling and avoids loss and waste of metal resources; meanwhile, the water treated through multiple processes greatly reduces the purchase amount of fresh water, effectively reducing the water use cost of enterprises.

[0008] As a further scheme of the application, the following steps are further included: S01, the pretreated water is backwashed after primary filtration, secondary filtration or tertiary filtration, and the backwashed water is discharged into a sewage treatment system; S02, the concentrated water generated after secondary filtration or tertiary filtration is discharged into the sewage treatment system.

[0009] Each filtration is subjected to long-term wastewater filtration, and the filtration effect of the filtration equipment will gradually decrease and the pressure difference will increase due to impurity blockage; backwashing of each filtration can effectively restore the flux and filtration performance of the filtration equipment, ensure continuous and stable operation of the equipment, prolong the service life of the equipment, and reduce equipment replacement and maintenance cost; regular backwashing of each filtration can ensure stable water quality after wastewater treatment, meet the use standards of different water uses in subsequent stages; meanwhile, the backwashed water or concentrated water is discharged into the sewage treatment system for further treatment, which can ensure that the pollutants are effectively removed, so that the quality of the finally recycled water meets the environmental protection standards of each stage.

[0010] As a further scheme of the application, the medicament includes NaOH, PAC and PAM added in sequence.

[0011] By adding sodium hydroxide (NaOH), polyaluminum chloride (PAC) and polyacrylamide (PAM) in sequence in the wastewater treatment tank, NaOH can effectively adjust the pH value of the wastewater, so that the wastewater is in an acid-base environment suitable for flocculation reaction, in which environment, PAC can effectively play its flocculation effect, and the fine suspended matter and colloidal particles in the wastewater are coagulated into larger flocs, and PAM further strengthens the coagulation effect of the flocs, so that the flocs are more compact and solid, thereby being more easily precipitated and separated; through the synergistic effect of the three, the removal efficiency of the suspended matter in the wastewater can be significantly improved, the impurity content entering the subsequent treatment link is reduced, better water quality conditions are provided for the subsequent treatment process, and the wastewater treatment process is more stable and reliable.

[0012] As a further scheme of the application, the first-stage filtration comprises a quartz sand filter and an activated carbon filter arranged in sequence, and the pretreated water is introduced into a first-stage reuse water tank or flows into the second-stage filtration after being filtered by the quartz sand filter and the activated carbon filter.

[0013] Since the first-stage filtration comprises a quartz sand filter and an activated carbon filter arranged in sequence, and the pretreated water is introduced into a first-stage reuse water tank or flows into the second-stage filtration after being filtered by the quartz sand filter and the activated carbon filter, the quartz sand filter uses quartz sand as the filtering medium, has a large pore structure, and can intercept and retain the larger suspended matter, silt, particulate impurities and the like in the pretreated water when the pretreated water passes through the quartz sand filter, thereby effectively reducing the turbidity of the water and preventing the large particles from causing abrasion and blockage of the subsequent equipment; the water preliminarily filtered by the quartz sand filter enters the activated carbon filter, and the activated carbon can adsorb the color, odor, residual chlorine, organic matter and other pollutants in the water, effectively removes the odor in the water and improves the color of the water to improve the sensory properties of the water, and meanwhile reduces the content of the organic matter in the water; the water filtered by the quartz sand filter and the activated carbon filter can be introduced into a first-stage reuse water tank for use in urban greening, road cleaning, firefighting, building construction and the like, thereby realizing preliminary recycling of the water resources, reducing the demand for fresh water resources and lowering the water cost of the enterprise; meanwhile, the water filtered by the first-stage filtration can be delivered to the second-stage filtration for further treatment of the water quality.

[0014] As a further scheme of the application, the second-stage filtration comprises a safety filter and an ultrafiltration device arranged in sequence, and the pretreated water is introduced into a second-stage reuse water tank or flows into the third-stage filtration after being filtered by the safety filter and the ultrafiltration device.

[0015] Since the secondary filtration comprises the security filter and the ultrafiltration device arranged in sequence, the pretreated water is introduced into the secondary reuse water tank or flows into the tertiary filtration after being filtered by the security filter and the ultrafiltration device; the pretreated water filtered by the primary filtration is filtered more finely by the security filter, further retains the residual large-particle impurities, and provides front protection for the ultrafiltration device, so that the ultrafiltration device can work under the condition of relatively clean water; the water filtered by the security filter enters the ultrafiltration device, the ultrafiltration device is a pressure-driven membrane separation technology, the ultrafiltration membrane has a specific pore size, can effectively remove colloids, organic matter and microorganisms in the water, and significantly improves the purity of the water quality; the water filtered by the security filter and the ultrafiltration device can be introduced into the secondary reuse water tank and used for production and living water of the enterprise, realizes the recycling of water resources in the industrial field, reduces the dependence of the enterprise on fresh water resources, and saves the production cost; meanwhile, the water filtered by the secondary filtration can be transported to the tertiary filtration for further treatment.

[0016] As a further scheme of the application, the tertiary filtration comprises a reverse osmosis device, and the pretreated water is introduced into the tertiary reuse water tank after being filtered by the reverse osmosis device.

[0017] Since the tertiary filtration comprises the reverse osmosis device, the pretreated water is introduced into the tertiary reuse water tank after being filtered by the reverse osmosis device; the reverse osmosis device is a pressure-driven membrane separation technology, and the core component reverse osmosis membrane has extremely high desalination performance; in the treatment of hard alloy sandblasting wastewater, the reverse osmosis membrane can effectively retain soluble salts such as calcium, magnesium, sodium and other cations and chlorine, sulfate and other anions, and after reverse osmosis treatment, the salt content in the water is greatly reduced, and the treated water can reach an extremely low salt content level; in addition to salts, the reverse osmosis membrane can also effectively block small-molecule organic matter, bacteria, viruses and other microorganisms, meet the use scenarios with extremely high requirements for water quality purity, and realize high-quality recycling of water resources.

[0018] As a further scheme of the application, an intermediate water tank is arranged between the ultrafiltration device and the reverse osmosis device, and a reverse osmosis booster device is arranged at the output end of the intermediate water tank.

[0019] By setting the intermediate water tank between the ultrafiltration device and the reverse osmosis device, the output end of the intermediate water tank is provided with a reverse osmosis booster device; the water production speed of the ultrafiltration device is relatively fast, and the reverse osmosis device has certain requirements for water inflow due to high filtering precision and large membrane resistance; the intermediate water tank can be used as a buffer area to store the water produced by the ultrafiltration device; when the water inflow demand of the reverse osmosis device is less than the water production speed of the ultrafiltration device, the excess water can be temporarily stored in the intermediate water tank; otherwise, when the water inflow demand of the reverse osmosis device is greater than the water production speed of the ultrafiltration device, the intermediate water tank can supplement the water to ensure the stable operation of the reverse osmosis device; at the same time, the reverse osmosis device needs to operate at a high pressure to achieve effective filtering and separation, the reverse osmosis booster device can pressurize the water in the intermediate water tank to the working pressure required by the reverse osmosis device, so as to ensure that the water can smoothly pass through the reverse osmosis membrane, realize efficient desalination and impurity removal, and effectively improve the reliability and effect of the whole water treatment.

[0020] As a further scheme of the present application: the sludge filter press is communicated with the external sludge packaging treatment device.

[0021] Since the sludge filter press is communicated with the external sludge packaging treatment device, after the sludge filter press completes the dewatering of the sludge, the dewatered sludge can be directly transported to the external sludge packaging treatment device, avoiding the cumbersome process of manual carrying and transferring of the sludge in the traditional treatment mode, making the sludge treatment process more compact and coherent, and greatly improving the efficiency of the whole sludge treatment operation; at the same time, the sludge after the pressure filtration can be quickly packaged, and the sludge in the pressure filter can be cleaned in time, so that the pressure filter can continuously perform new sludge dewatering work, thereby meeting the demand for rapid treatment of a large amount of sludge.

[0022] As a further scheme of the present application: the first-stage, second-stage and third-stage reuse water tanks are respectively provided with ultraviolet disinfection devices.

[0023] Since the first-stage, second-stage and third-stage reuse water tanks are respectively provided with ultraviolet disinfection devices; during the treatment and storage of the reuse water, bacteria, viruses, fungi and various microorganisms may breed. The ultraviolet light emitted by the ultraviolet disinfection device can destroy the nucleic acid structure of the microorganisms, so that the microorganisms lose the ability of reproduction and survival, thereby achieving the purpose of efficiently killing the microorganisms; after the reuse water at each stage is disinfected by the ultraviolet light, the content of the microorganisms in the water is greatly reduced, the risk of disease transmission caused by microbial pollution is reduced, the health and safety of the personnel using the reuse water are ensured, and it is ensured that the reuse water always meets the corresponding water quality standard during the storage and use. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.

[0025] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.Figure 1 A multi-stage recycling process flow chart for cemented carbide sand blasting wastewater. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations. The embodiments described below are presented by way of example only and are not intended to limit the scope of the application.

[0027] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0029] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear and understandable, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application, i.e. the described examples are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the scope of protection of the present application.

[0032] As Figure 1In the embodiment of the present application shown, a hard alloy sand blasting wastewater multi-stage recovery process comprises the following steps: S1, the sand blasting wastewater flows into a wastewater collection tank, and a medicament is continuously added to preliminarily remove the suspended solids in the wastewater to form pretreated water; S2, the pretreated water in the wastewater collection tank is returned to the wastewater collection tank after the turbidity and suspended solids of the wastewater are reduced by a sludge filter press, or the pretreated water in the wastewater collection tank directly flows into a recycled water booster system; S3, the recycled water booster system pressurizes and delivers the pretreated water to primary filtration, and the pretreated water is introduced into a primary recycled water tank or flows into secondary filtration after the pretreated water is subjected to primary filtration; S4, the pretreated water is introduced into a secondary recycled water tank or flows into tertiary filtration after the pretreated water is subjected to secondary filtration; S5, the pretreated water is introduced into a tertiary recycled water tank after the pretreated water is subjected to tertiary filtration.

[0033] Specifically, the hard alloy sand blasting wastewater multi-stage recovery process preliminarily treats the sand blasting wastewater through a wastewater collection tank and then subjects the wastewater to multi-stage filtration treatment; the pretreated water is introduced into a primary recycled water tank after the pretreated water is subjected to primary filtration treatment, and can be used for water for city greening, road cleaning and the like; the pretreated water is introduced into a secondary recycled water tank after the pretreated water is subjected to secondary filtration treatment, and can be used for water for enterprise production and life; the pretreated water is introduced into a tertiary recycled water tank after the pretreated water is subjected to tertiary filtration treatment, and can be used for pure water, drinking water and the like; the water treated at each filtration stage can meet different water standards, effectively reduces direct discharge of wastewater and waste of water resources, realizes recovery and recycling of the wastewater, reduces pollution of the wastewater to the environment, and reduces operation cost of wastewater treatment of a sewage station; The wastewater is subjected to preliminary treatment and then multi-stage filtration treatment, so that metal scraps in the wastewater can be precipitated and enriched, which creates favorable conditions for metal resource recovery and avoids loss and waste of metal resources; at the same time, the water treated by multiple treatments greatly reduces the purchase amount of fresh water, effectively reducing the water cost of the enterprise.

[0034] Further, the following steps are further included: S01, the pretreated water is subjected to backwashing after the pretreated water is subjected to primary filtration, secondary filtration or tertiary filtration, respectively, and the backwashing water after washing is discharged into a sewage treatment system; S02, the concentrated water produced after the secondary filtration or the tertiary filtration is discharged into the sewage treatment system.

[0035] Specifically, the long-term wastewater filtration of each stage of filtration can gradually reduce the filtration effect of the filtration equipment due to impurity blockage, and the pressure difference increases, and by backwashing each stage of filtration, the flux and filtration performance of the filtration equipment can be effectively restored, ensuring its continuous and stable operation, prolonging the service life of the equipment, reducing equipment replacement and maintenance costs; and regular backwashing of each stage of filtration can ensure stable water quality after wastewater treatment, meeting the use standards of different water in subsequent stages; at the same time, the backwashing water or concentrated water is discharged into the sewage treatment system for further treatment, which can ensure that the pollutants are effectively removed, and the quality of the finally recovered water meets the environmental protection standards of each stage.

[0036] Further, the medicament comprises NaOH, PAC and PAM added in sequence.

[0037] Specifically, by adding sodium hydroxide (NaOH), polyaluminum chloride (PAC) and polyacrylamide (PAM) in the wastewater treatment tank in sequence, NaOH can effectively adjust the pH value of the wastewater, so that the wastewater is in an acid-base environment suitable for flocculation reaction, and the addition of PAC in this environment can effectively play its flocculation effect, and the fine suspended matter and colloidal particles in the wastewater are coagulated into larger flocs, and PAM further strengthens the coagulation effect of the flocs, so that the flocs are more compact and solid, thereby more easily precipitated and separated; through the synergistic effect of the three, the removal efficiency of suspended solids in the wastewater can be significantly improved, the impurity content entering the subsequent treatment link is reduced, and better water quality conditions are provided for the subsequent treatment process, ensuring that the wastewater treatment process is more stable and reliable.

[0038] According to the embodiment of the application, the primary filtration comprises a quartz sand filter and an activated carbon filter arranged in sequence, and the pretreated water is introduced into a primary reclaimed water tank or flows into the secondary filtration after being filtered by the quartz sand filter and the activated carbon filter.

[0039] Specifically, since the first-stage filtration includes the quartz sand filter and the activated carbon filter arranged in sequence, the pretreated water is introduced into the first-stage reuse water tank or flows into the second-stage filtration after being filtered by the quartz sand filter and the activated carbon filter; the quartz sand filter uses quartz sand as the filtering medium, has a large pore structure, and can intercept and retain the large suspended matters, silt, particulate impurities and the like in the water when the pretreated water passes through the quartz sand filter, thereby effectively reducing the turbidity of the water and preventing the large particulate matters from causing abrasion and blockage of the subsequent equipment; the water preliminarily filtered by the quartz sand filter enters the activated carbon filter, the activated carbon can adsorb the color, odor, residual chlorine, organic matters and other pollutants in the water, effectively removes the odor in the water and improves the color of the water to improve the sensory properties of the water, and meanwhile reduces the content of the organic matters in the water; the water filtered by the quartz sand filter and the activated carbon filter can be introduced into the first-stage reuse water tank for use in urban greening, road cleaning, firefighting, building construction and the like, thereby realizing the preliminary recycling of the water resources, reducing the demand for fresh water resources and lowering the water cost of the enterprise; meanwhile, the water filtered by the first-stage filtration can be delivered to the second-stage filtration for further treatment of the water quality.

[0040] Further, the second-stage filtration includes the safety filter and the ultrafiltration device arranged in sequence, and the pretreated water is introduced into the second-stage reuse water tank or flows into the third-stage filtration after being filtered by the safety filter and the ultrafiltration device.

[0041] Specifically, since the second-stage filtration includes the safety filter and the ultrafiltration device arranged in sequence, the pretreated water is introduced into the second-stage reuse water tank or flows into the third-stage filtration after being filtered by the safety filter and the ultrafiltration device; the safety filter is used to more finely filter the pretreated water filtered by the first-stage filtration, further retains the large particulate impurities remaining therein, and provides front protection for the ultrafiltration device to ensure that the ultrafiltration device can work under the condition of relatively clean water; the water treated by the safety filter enters the ultrafiltration device, the ultrafiltration device is a pressure-driven membrane separation technology, the ultrafiltration membrane thereof has a specific pore size, can effectively remove the colloids, organic matters and microorganisms in the water, and significantly improves the purity of the water quality; the water filtered by the safety filter and the ultrafiltration device can be introduced into the second-stage reuse water tank for use in the production and living water of the enterprise, thereby realizing the recycling of the water resources in the industrial field, reducing the dependence of the enterprise on fresh water resources, and saving the production cost; meanwhile, the water filtered by the second-stage filtration can be delivered to the third-stage filtration for further treatment of the water quality.

[0042] Further, the third-stage filtration includes the reverse osmosis device, and the pretreated water is introduced into the third-stage reuse water tank after being filtered by the reverse osmosis device.

[0043] Specifically, since the three-stage filtration includes a reverse osmosis device, the pretreated water is introduced into the three-stage recycling water tank after being filtered by the reverse osmosis device; the reverse osmosis device is a membrane separation technology driven by pressure, and the reverse osmosis membrane, the core component of the reverse osmosis device, has extremely high desalination performance; in the treatment of hard alloy sand blasting wastewater, the reverse osmosis membrane can effectively intercept soluble salts, such as calcium, magnesium, sodium and other cations, and chlorine, sulfate and other anions; after reverse osmosis treatment, the salt content in the water is greatly reduced, and the treated water can reach an extremely low salt content level; in addition to salts, the reverse osmosis membrane can also effectively block small-molecule organic matter, bacteria, viruses and other microorganisms, meet the use scenarios with extremely high requirements for water quality purity, and realize high-quality recycling of water resources.

[0044] Further, an intermediate water tank is arranged between the ultrafiltration device and the reverse osmosis device, and a reverse osmosis booster device is arranged at the output end of the intermediate water tank.

[0045] Specifically, by arranging the intermediate water tank between the ultrafiltration device and the reverse osmosis device, and arranging the reverse osmosis booster device at the output end of the intermediate water tank; the water production speed of the ultrafiltration device is relatively fast, while the reverse osmosis device has certain requirements for water inflow due to its high filtration precision and large membrane resistance; the intermediate water tank can serve as a buffer area to store the water produced by the ultrafiltration device; when the water inflow requirement of the reverse osmosis device is less than the water production speed of the ultrafiltration device, the excess water can be temporarily stored in the intermediate water tank; conversely, when the water inflow requirement of the reverse osmosis device is greater than the water production speed of the ultrafiltration device, the intermediate water tank can supplement the water to ensure the stable operation of the reverse osmosis device; at the same time, the reverse osmosis device needs to operate at a relatively high pressure to achieve effective filtration and separation; the reverse osmosis booster device can pressurize the water in the intermediate water tank to the working pressure required by the reverse osmosis device, ensuring that the water can smoothly pass through the reverse osmosis membrane to achieve efficient desalination and impurity removal, and effectively improve the reliability and effect of the entire water treatment.

[0046] According to the embodiment of the present application, the sludge filter press is in communication with the external sludge packaging treatment device.

[0047] Specifically, since the sludge filter press is in communication with the external sludge packaging treatment device, after the sludge filter press completes the dewatering of the sludge, the dewatered sludge can be directly transported to the external sludge packaging treatment device, avoiding the cumbersome process of manual handling and transferring of sludge in the traditional treatment method, making the sludge treatment process more compact and coherent, and greatly improving the efficiency of the entire sludge treatment operation; at the same time, the sludge after filtration can be quickly packaged, and the sludge in the filter press can be cleaned in time, so that the filter press can continuously perform new sludge dewatering work, thereby meeting the demand for rapid treatment of a large amount of sludge.

[0048] In addition, it should be noted that the first-stage recycling water tank, the second-stage recycling water tank and the third-stage recycling water tank are respectively provided with ultraviolet disinfection devices.

[0049] Specifically, because the first, second and third reuse water tanks are respectively provided with ultraviolet disinfection devices; during the treatment and storage of the reuse water, bacteria, viruses, fungi and other microorganisms can breed. The ultraviolet light emitted by the ultraviolet disinfection device can destroy the nucleic acid structure of the microorganisms, so that the microorganisms lose the ability to reproduce and survive, thereby achieving the purpose of efficiently killing the microorganisms; after the reuse water at all levels is disinfected by the ultraviolet light, the content of the microorganisms in the water is greatly reduced, the risk of disease transmission caused by microbial pollution is reduced, the health and safety of the personnel using the reuse water are ensured, and it is ensured that the reuse water always meets the corresponding water quality standards during storage and use.

[0050] The above is merely an example and a description of the structure of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them with similar ways, as long as the modifications or supplements do not deviate from the structure of the present application or exceed the scope defined by the present application, and should belong to the protection scope of the present application.

Claims

1. A multi-stage cemented carbide blasting wastewater recovery process, characterized in that, It comprises the following steps: S1, the sand blasting wastewater flows into the wastewater collection tank, and continuously adds the reagent, preliminarily removes the suspended solids in the wastewater, and forms pretreated water; S2, the pretreated water in the wastewater collection tank is returned to the wastewater collection tank after reducing the turbidity and suspended solids of the wastewater by the sludge filter press, or the pretreated water in the wastewater collection tank directly flows into the reuse water booster system; S3, the pretreated water is pressurized and transported to the primary filtration by the reuse water booster system, and the pretreated water is introduced into the primary reuse water tank or flows into the secondary filtration after the primary filtration; S4, the pretreated water is introduced into the secondary reuse water tank or flows into the tertiary filtration after the secondary filtration; S5, the pretreated water is introduced into the tertiary reuse water tank after the tertiary filtration.

2. A multi-stage cemented carbide blasting wastewater recovery process according to claim 1, characterized in that, It also comprises the following steps: S01, the pretreated water is backwashed after the primary filtration, the secondary filtration or the tertiary filtration, and the backwash water is discharged into the sewage treatment system; S02, the concentrated water generated after the secondary filtration or the tertiary filtration is discharged into the sewage treatment system.

3. The multi-stage cemented carbide blasting wastewater recovery process according to claim 1, characterized in that, The reagent comprises NaOH, PAC and PAM added in sequence.

4. The cemented carbide blasting wastewater multi-stage recovery process according to claim 1, characterized in that, The primary filtration comprises a quartz sand filter and an activated carbon filter arranged in sequence, and the pretreated water is introduced into the primary reuse water tank or flows into the secondary filtration after being filtered by the quartz sand filter and the activated carbon filter.

5. A multi-stage cemented carbide blasting wastewater recovery process according to claim 4, characterized in that, The secondary filtration comprises a security filter and an ultrafiltration device arranged in sequence, and the pretreated water is introduced into the secondary reuse water tank or flows into the tertiary filtration after being filtered by the security filter and the ultrafiltration device.

6. A multi-stage cemented carbide blasting wastewater recovery process according to claim 5, characterized in that, The tertiary filtration comprises a reverse osmosis device, and the pretreated water is introduced into the tertiary reuse water tank after being filtered by the reverse osmosis device.

7. A multi-stage cemented carbide blasting wastewater recovery process according to claim 6, characterized in that, An intermediate water tank is arranged between the ultrafiltration device and the reverse osmosis device, and a reverse osmosis booster device is arranged at the output end of the intermediate water tank.

8. The cemented carbide blasting wastewater multi-stage recovery process according to claim 1, characterized in that, The sludge filter press is communicated with an external sludge packaging treatment device.

9. A multi-stage cemented carbide blasting water recovery process according to any one of claims 1 to 8, c h a r a c t e r i s e d i n that Ultraviolet disinfection devices are arranged in the primary reuse water tank, the secondary reuse water tank and the tertiary reuse water tank respectively.

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