Filtering and separating system for evaporating and concentrating complex chemical wastewater

Abstract

The utility model discloses a filtering and separating system for evaporating and concentrating complex chemical wastewater, which comprises a storage tank for collecting the chemical wastewater and a reaction kettle, an inlet end of the reaction kettle is connected with an outlet end of the storage tank, the reaction kettle is used for receiving the chemical wastewater in the storage tank and carrying out pretreatment reaction on the chemical wastewater, and an outlet end of the reaction kettle is connected with an outlet end of the storage tank. The inlet end of the scraper screening machine is connected with the outlet end of the reaction kettle, and the scraper screening machine is used for receiving the wastewater pretreated by the reaction kettle and screening a floating oil phase and viscous substances in the pretreated wastewater. According to the utility model, chemical wastewater containing high salinity, high viscosity and even complex components of organic matters can be treated more efficiently, so that the problem of impurities in an evaporation concentrated solution in the prior art is solved, the continuity and efficiency of production are improved, and the maintenance cost and replacement frequency of equipment are reduced.

Description

Technical Field

[0001] This utility model relates to the field of physicochemical treatment technology of chemical wastewater, specifically a filtration and separation system for the evaporation and concentration of complex chemical wastewater. Background Technology

[0002] In the treatment of chemical wastewater from complex processes, whether using single-effect or multi-effect evaporation technology, once the material is concentrated to a certain extent, it must be discharged and proceed to the next process. However, this concentrated liquid usually contains various impurities, such as salts, greases, and large particles. These impurities, upon entering the next process, cause salt precipitation and the adhesion of viscous organic matter, leading to blockages in equipment and pipelines, severely impacting production continuity. In particular, some wastewater contains large amounts of miscible organic matter that does not easily precipitate before evaporation. However, as water continuously precipitates during the evaporation and concentration process, large amounts of viscous organic matter begin to precipitate from the waste liquid. As the temperature decreases and solidifies, this severely blocks the system pipelines. Therefore, periodic shutdowns for cleaning are necessary. Furthermore, the large amounts of precipitated salts corrode equipment and pipelines, further increasing maintenance costs and replacement frequency.

[0003] Meanwhile, the mother liquor after evaporation and concentration contains a large amount of insoluble matter, making it impossible to effectively return to the evaporation system for recirculation. This results in excessive amounts of incompletely evaporated mother liquor being forced to be discharged, increasing the production load, labor intensity, and production costs of the next incineration process. This not only reduces overall production efficiency but also negatively impacts the company's economic benefits. Therefore, a filtration and separation system for the evaporation and concentration of complex chemical wastewater is designed. Utility Model Content

[0004] In view of the defects or deficiencies in the process of treating complex chemical wastewater, the purpose of this utility model is to provide a filtration and separation system for the evaporation and concentration of complex chemical wastewater, which realizes the efficient treatment of complex chemical wastewater, improves the continuity and efficiency of treatment, and reduces equipment maintenance costs and replacement frequency.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a filtration and separation system for the evaporation and concentration of complex chemical wastewater, comprising: a storage tank for collecting chemical wastewater; a reaction vessel, the inlet of which is connected to the outlet of the storage tank, for receiving the chemical wastewater in the storage tank and pre-treating the chemical wastewater; a scraper screen, the inlet of which is connected to the outlet of the reaction vessel, for receiving the pre-treated wastewater from the reaction vessel and screening the floating oil phase and viscous substances in the pre-treated wastewater; a hydrocyclone separator, the inlet of which is connected to the outlet of the scraper screen, for receiving the wastewater screened by the scraper screen and further separating it; a single-effect evaporator, the inlet of which is connected to the outlet of the hydrocyclone separator, for receiving the wastewater separated by the hydrocyclone separator and evaporating and concentrating it; and a plate and frame filter press. The inlet of the plate and frame filter press is connected to the outlet of the single-effect evaporator, for receiving the concentrated mother liquor produced by the single-effect evaporator and filtering it; the centrifuge, with its inlet connected to the outlet of the plate and frame filter press, is for receiving the concentrated mother liquor after filtration by the plate and frame filter press and centrifuging it; the incineration equipment, with its inlet connected to the outlet of the centrifuge, is for receiving the high-calorific-value mother liquor separated by the centrifuge and incinerating it; and the landfill equipment, with its inlet connected to the solid material outlets of the hydrocyclone, the plate and frame filter press, and the centrifuge, respectively, for receiving the solid material separated by the hydrocyclone, the solid material filtered by the plate and frame filter press, and the solid material separated by the centrifuge for landfill disposal.

[0007] Preferably, there are two or more storage tanks, which are used to collect chemical wastewater from different sources and to perform preliminary classification, storage and management.

[0008] Preferably, the oil phase material outlet end of the scraper screen is connected to the inlet end of the incineration treatment equipment to provide oil phase material to the incineration treatment equipment.

[0009] Preferably, the liquid phase material outlet of the centrifuge is connected to the inlet of the single-effect evaporator, for supplying the single-effect evaporator with concentrated mother liquor that does not meet the incineration treatment standard.

[0010] Preferably, the outlet end of the centrifuge for viscous liquid phase is connected to the inlet end of the reactor to provide viscous organic solids to the reactor.

[0011] Preferably, the liquid phase outlet of the hydrocyclone is connected to the inlet of the reactor to provide the reactor with a mixed waste liquid containing significant impurities that have resulted in incomplete reaction.

[0012] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0013] Full-process treatment: The system covers the entire process from pretreatment to final treatment. Starting from the storage tank, it goes through the reaction vessel, scraper screen, hydrocyclone separator, single-effect evaporator, plate and frame filter press and centrifuge. The whole process takes into account the treatment of various complex components of chemical wastewater and has designed special pretreatment and separation steps for it.

[0014] Targeted pretreatment: Different separation devices are used to separate and filter different insoluble solid substances in chemical wastewater. This pretreatment method can conveniently and effectively separate solid substances from wastewater, reducing the disposal pressure and improving efficiency for subsequent evaporation and concentration processes.

[0015] Multi-stage separation: The system's hydrocyclone, plate and frame filter press, and centrifuge separate different components in the wastewater. This multi-stage separation design enables more precise treatment of various components in the wastewater, ensuring that substances such as salt particles and organic matter can be effectively separated.

[0016] Resource-efficient utilization: The system design takes into account the principles of resource conservation and ease of operation. For example, the centrifuge can not only send the completely evaporated mother liquor to incineration, but also send the incompletely evaporated mother liquor to a single-effect evaporator for secondary evaporation. It can also send the mother liquor, which releases a large amount of organic phase after the water evaporates, to a scraper screen for separation. This design improves equipment utilization, reduces energy and time waste, and ensures equipment safety and stable subsequent production. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a schematic diagram of the filtration and separation system for evaporation and concentration of complex chemical wastewater provided by this utility model.

[0019] In the picture:

[0020] 100. Storage tank;

[0021] 200. Reactor;

[0022] 300. Scraper screen;

[0023] 400. Hydrocyclone separator;

[0024] 500. Single-effect evaporation equipment;

[0025] 600. Plate and frame filter press;

[0026] 700. Centrifuge;

[0027] 800. Incineration equipment;

[0028] 900. Landfill disposal equipment. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] like Figure 1 As shown, a filtration and separation system for the evaporation and concentration of complex chemical wastewater includes:

[0033] Storage tank 100 is used to collect chemical wastewater. Multiple storage tanks 100 are set up according to the nature and source of the wastewater to facilitate classified storage and management.

[0034] The reactor 200 is connected at its inlet to the outlet of the storage tank 100. It is used to receive chemical wastewater from the storage tank 100 and to pre-treat the chemical wastewater. By adding chemical reagents or other treatment agents, some impurities are removed or flocculated, and the reactive wastewater is combined in pairs to generate precipitates that are easier to filter and separate, thus achieving the purpose of treating waste with waste. The specific operation mode of the reactor can be adjusted according to the nature of the wastewater and the types of impurities that are easy to handle in the system to achieve the best treatment effect.

[0035] The scraper screen 300 is connected to the outlet of the reactor 200. It is used to receive the pretreated wastewater from the reactor 200 and to screen the floating oil phase and viscous substances in the pretreated wastewater. Through the screening action of the scraper screen 300, the floating matter and viscous impurities are sent to the incineration treatment equipment 800 to ensure the smooth progress of subsequent treatment.

[0036] The hydrocyclone separator 400 is connected at its inlet to the outlet of the scraper screen 300. It is used to receive the wastewater after screening by the scraper screen 300 and further separate it. Through the rotation of the hydrocyclone separator 400, large particles of salt in the wastewater are initially separated to prevent them from entering the subsequent system and causing equipment damage. At the same time, for mixed waste liquids that have not fully reacted due to the presence of obvious impurities, they can be returned to the reaction vessel 200 after two pretreatments to continue to react fully with other wastewaters.

[0037] The single-effect evaporator 500 has its inlet end connected to the outlet end of the hydrocyclone 400. It is used to receive the wastewater separated by the hydrocyclone 400 and evaporate and concentrate it. As the liquid phase in the wastewater continues to evaporate into concentrated mother liquor, a large amount of filterable particulate salt begins to precipitate in the system. The operating temperature and pressure of the single-effect evaporator 500 can be adjusted according to the properties of the wastewater and the evaporation efficiency.

[0038] The plate and frame filter press 600 is connected at its inlet to the outlet of the single-effect evaporator 500. It is used to receive the concentrated mother liquor produced by the single-effect evaporator 500 and filter it. Through the filtration action of the plate and frame filter press 600, the solid salts in the wastewater are separated and the separated salts are sent to the landfill disposal equipment 900. The operating pressure and filtration speed of the plate and frame filter press 600 can be adjusted according to the properties of the concentrated mother liquor to ensure the best filtration effect.

[0039] Centrifuge 700 is connected to the outlet of plate and frame filter press 600. It is used to receive the concentrated mother liquor after filtration by plate and frame filter press 600 and centrifuge it. Through the centrifugal force of centrifuge 700, the incompletely filtered particulate salt in the mother liquor is separated, and the high-calorific-value mother liquor after complete evaporation is sent to incineration treatment equipment 800 for incineration treatment. The speed and separation time of centrifuge 700 can be adjusted according to the properties of concentrated mother liquor to ensure the best centrifugation effect.

[0040] The incineration treatment equipment 800 is connected to the outlet end of the centrifuge 700 and is used to receive the high-calorific-value mother liquor separated by the centrifuge 700 and incinerate it.

[0041] The landfill disposal equipment 900 has its inlet end connected to the solid material outlet end of the hydrocyclone 400, the solid material outlet end of the plate and frame filter press 600, and the solid material outlet end of the centrifuge 700, respectively, for receiving the solid material separated by the hydrocyclone 400, the solid material filtered by the plate and frame filter press 600, and the solid material separated by the centrifuge 700 for landfill disposal.

[0042] There are two or more storage tanks 100. The two or more storage tanks 100 are used to collect chemical wastewater from different sources and to perform preliminary classification, storage and management.

[0043] The oil phase material outlet of the scraper screen 300 is connected to the inlet of the incineration treatment equipment 800 to provide oil phase material to the incineration treatment equipment 800. The scraper screen 300 sends the oil phase material into the incineration treatment equipment 800 for incineration treatment.

[0044] The liquid phase material outlet of the centrifuge 700 is connected to the inlet of the single-effect evaporator 500 to provide concentrated mother liquor that does not meet the incineration treatment standard to the single-effect evaporator 500. After separation by the centrifuge 700, the concentrated mother liquor that does not meet the incineration treatment standard can be returned to the single-effect evaporator 500 for secondary evaporation to ensure that the calorific value meets the standard.

[0045] The outlet end of the centrifuge 700 for viscous liquid phase is connected to the inlet end of the reactor 200 to provide viscous organic solids to the reactor 200. Some wastewater containing a large amount of miscible organic matter will precipitate a large amount of viscous organic solids during the evaporation and concentration process. At this time, it can be directly returned to the reactor 200 and sent to the incineration disposal via the scraper screen 300.

[0046] The liquid phase outlet of the hydrocyclone 400 is connected to the inlet of the reactor 200. It is used to supply the reactor 200 with mixed waste liquid containing obvious impurities that have not fully reacted. For mixed waste liquid that has not fully reacted due to the presence of obvious impurities, it can be returned to the reactor 200 after two pretreatments to continue to fully react with other wastewater.

[0047] It should be noted that the connection relationship between the devices in this utility model is a well-known method for those skilled in the art, and therefore will not be described in detail in this utility model.

[0048] This utility model covers the entire process from pretreatment to final treatment. Starting from the storage tank 100, it passes through the reaction vessel 200, scraper screen 300, hydrocyclone 400, single-effect evaporator 500, plate and frame filter press 600, and centrifuge 700. The entire process takes into account the handling of various complex components of chemical wastewater and designs special pretreatment and separation steps for it. Different separation equipment is used to separate and filter different insoluble solid substances in chemical wastewater. This pretreatment method can conveniently and effectively separate solid substances from wastewater, reducing the disposal pressure and improving efficiency for subsequent evaporation and concentration processes. The hydrocyclone 400, plate and frame filter press 600, and centrifuge 700 in this utility model are included. Centrifuge 700 separates different components in wastewater. This multi-stage separation design can more accurately process various components in wastewater, ensuring that salt particles, organic matter, and other substances in the wastewater can be effectively separated. This utility model design takes into account the principles of resource saving and convenient operation. For example, centrifuge 700 can not only send the completely evaporated mother liquor to incineration, but also send the mother liquor that has not been completely evaporated to the single-effect evaporator 500 for secondary evaporation. It can also send the mother liquor with a large amount of organic phase precipitated after the water evaporates to the scraper screen 300 for separation. This design improves the utilization rate of the equipment, reduces the waste of energy and time, and ensures the safety of the equipment and the stability of subsequent production.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A filtration and separation system for the evaporation and concentration of complex chemical wastewater, characterized in that, include: Storage tank (100) is used to collect chemical wastewater; A reaction vessel (200) is connected at its inlet end to the outlet end of the storage tank (100) for receiving chemical wastewater from the storage tank (100) and performing pretreatment reaction on the chemical wastewater. A scraper screen (300) is provided, the inlet end of which is connected to the outlet end of the reactor (200), for receiving the pretreated wastewater from the reactor (200) and screening the floating oil phase and viscous substances in the pretreated wastewater. A hydrocyclone separator (400) is provided, the inlet of which is connected to the outlet of the scraper screen (300), for receiving the wastewater after screening by the scraper screen (300) and further separating it. A single-effect evaporator (500) is provided, the inlet of which is connected to the outlet of the hydrocyclone (400), for receiving the wastewater separated by the hydrocyclone (400) and evaporating and concentrating it. A plate and frame filter press (600) is provided, the inlet end of which is connected to the outlet end of the single-effect evaporator (500), for receiving the concentrated mother liquor generated by the single-effect evaporator (500) and performing filter press treatment on it. Centrifuge (700), the inlet end of which is connected to the outlet end of plate and frame filter press (600), is used to receive the concentrated mother liquor after filtration by plate and frame filter press (600) and centrifuge it; An incineration treatment device (800) is provided, the inlet end of which is connected to the outlet end of the centrifuge (700), for receiving the high-calorific-value mother liquor separated by the centrifuge (700) and incinerating it. A landfill disposal device (900) is provided, the inlet of which is connected to the solid material outlet of the hydrocyclone (400), the solid material outlet of the plate and frame filter press (600), and the solid material outlet of the centrifuge (700), respectively, for receiving the solid material separated by the hydrocyclone (400), the solid material filtered by the plate and frame filter press (600), and the solid material separated by the centrifuge (700) for landfill disposal.

2. The filtration and separation system for evaporation and concentration of complex chemical wastewater according to claim 1, characterized in that: There are two or more storage tanks (100), which are used to collect chemical wastewater from different sources and to perform preliminary classification, storage and management.

3. The filtration and separation system for evaporation and concentration of complex chemical wastewater according to claim 1, characterized in that: The oil phase material outlet end of the scraper screen (300) is connected to the inlet end of the incineration treatment equipment (800) for supplying oil phase material to the incineration treatment equipment (800).

4. The filtration and separation system for evaporation and concentration of complex chemical wastewater according to claim 1, characterized in that: The liquid phase material outlet of the centrifuge (700) is connected to the inlet of the single-effect evaporator (500) to provide the single-effect evaporator (500) with concentrated mother liquor that does not meet the incineration treatment standard.

5. The filtration and separation system for evaporation and concentration of complex chemical wastewater according to claim 1, characterized in that: The outlet end of the centrifuge (700) for viscous liquid phase is connected to the inlet end of the reactor (200) for supplying viscous organic solids to the reactor (200).

6. The filtration and separation system for evaporation and concentration of complex chemical wastewater according to claim 1, characterized in that: The liquid phase outlet of the hydrocyclone (400) is connected to the inlet of the reactor (200) to provide the reactor (200) with a mixed waste liquid containing significant impurities that resulted in incomplete reaction.

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