A thermal treatment wastewater advanced treatment system

Abstract

The utility model discloses a heat treatment wastewater advanced treatment system relates to water treatment technical field, technical scheme is, including first filter part and second filter part, wherein first filter part contains a plurality of first filter branch path and first water production tank with the first filter branch path of outside ultrafiltration system clean water outlet intercommunication, and the second filter part includes the first concentrated water tank and a plurality of second filter branch path with the first concentrated water tank of first filter branch path concentrated water outlet intercommunication, and first, second filter branch path are all reverse osmosis type structure. Its beneficial effect lies in: the first filter part of multibranch parallel improves processing efficiency, removes impurity such as dissolved salt through reverse osmosis membrane, satisfies high purity water demand, after the first concentrated water tank collects concentrated water, and after the second filter branch path is concentrated again, changes traditional low -efficiency discharge mode, improves water resource utilization, avoids environmental pollution, reduces processing cost, realizes environmental protection and economic benefit unity.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a deep treatment system for heat treatment wastewater. Background Technology

[0002] The heat treatment process generates a large amount of wastewater. According to environmental protection requirements, it cannot be directly discharged; and in the current water treatment field, with the acceleration of industrialization and people's increasing demands for water quality, efficient, energy-saving and environmentally friendly water purification technologies have become a research hotspot.

[0003] In existing wastewater treatment systems, ultrafiltration technology is a commonly used pretreatment method that can effectively remove impurities such as suspended solids, colloids, bacteria, and large organic molecules from water, resulting in preliminarily purified water. However, water treated by ultrafiltration still contains a certain amount of dissolved salts, small organic molecules, and heavy metal ions, making it difficult to meet the requirements of some applications with extremely high water quality standards, such as water used in the electronics industry and pharmaceuticals.

[0004] To further improve water quality, reverse osmosis technology is often used as a deep treatment method after ultrafiltration. Reverse osmosis membranes can remove dissolved salts, organic matter, heavy metal ions, and other contaminants from water, resulting in water with high purity. However, the reverse osmosis process produces a certain amount of concentrate, which contains high concentrations of salts and pollutants. Direct discharge of this concentrate not only wastes water resources but also pollutes the environment.

[0005] Currently, the treatment of reverse osmosis concentrate usually involves dilution and discharge or simple treatment before discharge. This method not only fails to make full use of water resources but also increases treatment costs and environmental burden.

[0006] Therefore, how to further treat the purified water after ultrafiltration to obtain water with higher purity, and at the same time, to further concentrate the concentrated water produced by reverse osmosis treatment, improve the utilization rate of water resources, and reduce the impact of concentrated water discharge on the environment, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] To address one of the shortcomings of existing technologies, this utility model provides a deep treatment system for heat treatment wastewater, solving the problem of re-treatment of treated wastewater.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a deep treatment system for heat treatment wastewater, comprising a first filtration section and a second filtration section;

[0009] The first filter includes,

[0010] The first filtration branch has several branches, and the inlet of each filtration branch is connected to the purified water outlet of the external ultrafiltration system.

[0011] The first water production tank has its inlet end connected to the purified water outlet end of the first filtration branch;

[0012] The second filter includes,

[0013] The first concentrate tank has its inlet end connected to the concentrate outlet end of the first filter branch;

[0014] The second filtration branch has several branches, and the inlet of the second filtration branch is connected to the outlet of the first concentrate tank.

[0015] Both the first and second filtration branches are reverse osmosis filtration structures.

[0016] Preferably, the first filtration section has three first filtration branches and one first water production tank. The three first filtration branches are arranged in parallel pipeline structure, and the purified water outlet of each of the three first filtration branches is connected to the water inlet of the first water production tank.

[0017] Preferably, each of the first filtering branches includes:

[0018] The first booster pump has its inlet end connected to the purified water outlet end of the external ultrafiltration system via a pipeline.

[0019] The first filter component is a reverse osmosis filter structure, and its inlet end is connected to the outlet end of the first booster pump.

[0020] Preferably, the first filtering component includes:

[0021] The inlet end of the reverse osmosis membrane tube A is connected to the outlet end of the first booster pump via a pipeline;

[0022] The inlet end of the reverse osmosis membrane tube B is connected to the concentrate outlet end of the reverse osmosis membrane tube A;

[0023] The purified water outlets of both reverse osmosis membrane tube A and reverse osmosis membrane tube B are connected to the first product water tank; the concentrated water outlet of reverse osmosis membrane tube B is connected to the first concentrated water tank.

[0024] Preferably, the first filter section further includes:

[0025] The first dosing branch A includes a first dosing tank A, which is connected to each of the first filtration branches via a pump and pipelines. The connection point between the first dosing branch A and the first filtration branch is located on the inlet side of the first booster pump.

[0026] Preferably, the first filter section further includes:

[0027] The first dosing branch B includes a first dosing tank B, which is connected to each of the first filtration branches via a pump and pipelines. The connection point between the first dosing branch B and the first filtration branch is located on the inlet side of the first booster pump.

[0028] Preferably, the second filter section further includes:

[0029] The pretreatment branch has two parallel pipelines connected together, with the inlet of the pretreatment branch connected to the outlet of the first concentrate tank. The pretreatment branch is equipped with a filter and a second booster pump, with the second booster pump located on the outlet side of the filter.

[0030] Preferably, the second filter section further includes:

[0031] The second dosing branch A is connected to both of the pretreatment branches, and the connection between the second dosing branch A and the pretreatment branches is located on the inlet side of the filter.

[0032] Preferably, the second filter section further includes:

[0033] The second dosing branch B is connected to both of the pretreatment branches, and the connection point between the second dosing branch B and the pretreatment branches is located on the inlet side of the filter.

[0034] Preferably, the second filtration section has two second filtration branches; the two second filtration branches are connected in parallel; each second filtration branch includes:

[0035] The reverse osmosis membrane tube C has an inlet end connected to the pretreatment branch, a purified water outlet end connected to the first product water tank, and a concentrate outlet end connected to the second concentrate tank.

[0036] The reverse osmosis membrane tube D has its inlet end connected to the pretreatment branch, its purified water outlet end connected to the first product water tank, and its concentrate outlet end connected to the second concentrate tank.

[0037] Compared with existing technologies, it has the following beneficial effects:

[0038] (1) The first filtration section of this solution uses several reverse osmosis first filtration branches to treat the water effluent from the ultrafiltration system. Compared with the traditional single filtration path, the multi-branch parallel structure not only greatly improves the treatment efficiency, but also effectively removes residual dissolved salts, small molecule organic matter and heavy metal ions in the water through the precise interception effect of the reverse osmosis membrane, so that the water quality of the product water meets the needs of high-purity water use scenarios such as electronics industry and medicine, and solves the problem of insufficient water quality after existing ultrafiltration treatment.

[0039] (2) For the concentrate produced by reverse osmosis treatment, the system collects it in the first concentrate tank and then uses several reverse osmosis second filtration branches for further concentration treatment. This secondary reverse osmosis design for concentrate changes the inefficient mode of traditional dilution discharge or simple treatment, further recovering and reusing the water resources in the concentrate, thus significantly improving the water resource utilization rate. It not only avoids the pollution of the environment caused by the direct discharge of high concentrations of salt and pollutants, but also reduces treatment costs by reducing the intake of fresh water, achieving a balance between environmental and economic benefits. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the first filter section according to an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of the first filtering branch structure according to an embodiment of this application;

[0042] Figure 3 This is a partial enlarged view of the first filtering branch in an embodiment of this application;

[0043] Figure 4 This is an enlarged view of the water discharge section of the first filtration unit in an embodiment of this application.

[0044] Figure 5 This is a schematic diagram of the structure of the second filter section according to an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the second filtering branch structure according to an embodiment of this application;

[0046] Figure 7 This is a schematic diagram of the preprocessing branch structure according to an embodiment of this application;

[0047] Figure 8 This is an enlarged view of the water discharge portion of the second filtration section in an embodiment of this application.

[0048] In the picture:

[0049] 1. First filtration section; 11. First filtration branch; 111. First booster pump; 112. Reverse osmosis membrane tube A; 113. Reverse osmosis membrane tube B; 12. First chemical dosing branch A; 13. First chemical dosing branch B; 14. First product water tank;

[0050] 2. Second filtration section; 21. First concentrate tank; 22. Pretreatment branch; 23. Second chemical dosing branch A; 24. Second chemical dosing branch B; 25. Second filtration branch; 251. Reverse osmosis membrane tube C; 252. Reverse osmosis membrane tube D. Detailed Implementation

[0051] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] Please see Figures 1-3 This application provides the following technical solutions:

[0053] A deep treatment system for thermal treatment wastewater, comprising: Figure 1 The first filter section 1 shown and Figure 5 The second filter unit 2 shown is presented separately from the first filter unit 1 and the second filter unit 2 due to the limitations of the image display area.

[0054] In terms of the general structure of this scheme, both the first filtration branch 11 and the second filtration branch 25 are reverse osmosis filtration structures. The first filtration section 1 is used to receive the purified water after treatment by the pre-ultrafiltration system and perform primary treatment on the purified water. The specific structure and treatment method of the ultrafiltration system are not the focus of this scheme and will not be described in detail here. The purified water after treatment by the first filtration section 1 is used as needed. The concentrated water obtained after treatment by the first filtration section 1 is sent to the second filtration section 2, where it undergoes further concentration and reverse osmosis treatment.

[0055] The first filtration unit 1 includes three first filtration branches 11, which are arranged in parallel pipelines. The inlet of each filtration branch 11 is connected to the purified water outlet of an external ultrafiltration system. The first filtration unit 1 is equipped with a first product water tank 14, into which the purified water outlets of the three first filtration branches 11 converge. The first product water tank 14 is made of FRP material and has a volume of 160 m³. 3 The first water production tank 14 is equipped with several branch lines to supply different water-using units.

[0056] The second filtration unit 2 includes a first concentrate tank 21. The concentrate outlets of the three first filtration branches 11 in the first filtration unit 1 converge and are supplied to the first concentrate tank 21. The volume of the first concentrate tank is selected to be 25m³. 3 Also made of FRP material. The second filtration unit 2 includes two second filtration branches 25 arranged in parallel pipelines. The inlet end of the second filtration branch 25 is connected to the outlet end of the first concentrate tank 21. The purified water produced by the second filtration branch 25 is connected to the first product water tank 14 through a pipeline, and the concentrate outlet end is connected to the second concentrate tank, which also has a volume of 25m³. 3 It is made of FRP material, and the second concentrate tank is not shown in the attached diagram.

[0057] This design achieves primary water purification of water treated by the ultrafiltration system. While ensuring purification efficiency, it also reduces resource waste and fully recovers purified water. The first filtration unit 1 and the second filtration unit 2 of this design are described in detail below.

[0058] Based on the above implementation plan, see Figure 2 Each first filtration branch 11 includes a first booster pump 111. The inlet of the first booster pump 111 is connected to the purified water outlet of the external ultrafiltration system via a pipeline. The first booster pump 111 is a CDMF42-70 variable frequency reverse osmosis high-pressure pump, whose operating parameters meet the 40m... 3 / h×146m×30KW. The first filtration branch 11 also includes a first filtration component, which is a reverse osmosis filtration structure and is equipped with a reverse osmosis membrane tube. The inlet end of the first filtration component is connected to the outlet end of the first booster pump 111.

[0059] The three first filter branches 11 in this scheme adopt a two-in-one-out working mode, that is, two of them are used in operation, and the other one is used as a backup.

[0060] Based on the above implementation scheme, the first filtration assembly includes reverse osmosis membrane tube A112 and reverse osmosis membrane tube B113. The inlet end of reverse osmosis membrane tube A112 is connected to the outlet end of the first booster pump 111 via a pipeline; the inlet end of reverse osmosis membrane tube B113 is connected to the concentrate outlet end of reverse osmosis membrane tube A112; the purified water outlet ends of both reverse osmosis membrane tubes A112 and B113 are connected to the first product water tank 14; and the concentrate outlet end of reverse osmosis membrane tube B113 is connected to the first concentrate tank 21. Both reverse osmosis membrane tubes A112 and B113 are made of FRP material, and each set of membrane tubes meets the requirement of 8"×6 cores.

[0061] This solution presents a structural application of two sets of reverse osmosis membrane tubes. However, in actual applications, more sets of membrane tubes can be connected and used based on this connection method.

[0062] Based on the above implementation plan, see Figure 3 A concentrate tank is also installed on the concentrate outlet passage of reverse osmosis membrane tube B113, and a manual valve is installed on the inlet pipe of the concentrate tank. In addition, a backwash branch is installed in the purified water pipeline of reverse osmosis membrane tubes A112 and B113. A valve is installed on this backwash branch, and the backwash branch is connected to the concentrate outlet pipeline of reverse osmosis membrane tube B113, with the connection point close to the concentrate outlet end of reverse osmosis membrane tube B113.

[0063] Based on the above implementation plan, see Figure 1The first filtration unit 1 further includes a first dosing branch A12 and a first dosing branch B13. The first dosing branch A12 includes a first dosing tank A, which is connected to each of the first filtration branches 11 via a pump and pipelines. The connection point between the first dosing branch A12 and the first filtration branch 11 is located on the inlet side of the first booster pump 111. The first dosing branch B13 includes a first dosing tank B, which is connected to each of the first filtration branches 11 via a pump and pipelines. The connection point between the first dosing branch B13 and the first filtration branch 11 is located on the inlet side of the first booster pump 111.

[0064] Both the first dosing tank A and the first dosing tank B are 200L tanks. First dosing tank A contains the reducing agent, and first dosing tank B contains the scale inhibitor. The pump in the first dosing branch A12 is an APG603, and the pump in the first dosing branch B13 is an AKS603. Both first dosing branches A12 and B13 are configured with one tank and three pumps, with one independent pump corresponding to each first filtration branch 11.

[0065] Based on the above implementation plan, see Figure 4 The first water tank 14 is divided into multiple water supply channels, which supply different water-using units respectively. The following are some of the solutions provided in this plan.

[0066] For boiler water supply, this branch line is equipped with a boiler water supply pump, specifically a CDL15-3 pump, whose parameters meet the 15m... 3 The boiler water supply pumps are configured with a capacity of 25m x 2.2KW per hour, and are located on two separate branch lines. One pump can be used as a backup, or both can be used simultaneously depending on the situation.

[0067] For cooling tower water supply, this branch line is equipped with a cooling tower water supply pump, specifically a CDL65-20 pump, with parameters meeting the 50m... 3 / h×45m×11KW, the cooling tower water supply branch is set up with three parallel branches, each equipped with a cooling tower water supply pump.

[0068] For kitchen water use, this branch line is equipped with a kitchen water supply pump, specifically a CHL2-50, with parameters meeting the 2m... 3 The pump is rated at 30m x 0.37kW and equipped with a frequency converter. The kitchen water supply pump also has two parallel branches, one for operation and one for backup. In addition, the kitchen water branch is equipped with a coconut shell activated carbon filter, a precision filter, and a UV sterilizer.

[0069] The water used for CIP cleaning can also be drawn from the first product water tank 14.

[0070] Based on the above implementation plan, see Figures 5 to 8The second filtration section 2 has two second filtration branches 25, which are connected in parallel. Each second filtration branch 25 includes a reverse osmosis membrane tube C251 and a reverse osmosis membrane tube D252. Unlike the connection method in the first filtration branch 11, the inlet end of the reverse osmosis membrane tube C251 is connected to the pretreatment branch 22, the purified water outlet end is connected to the first product water tank 14, and the concentrate outlet end is connected to the second concentrate tank. Similarly, the inlet end of the reverse osmosis membrane tube D252 is connected to the pretreatment branch 22, the purified water outlet end is connected to the first product water tank 14, and the concentrate outlet end is connected to the second concentrate tank. In other words, the reverse osmosis membrane tubes in the first filtration branch 11 adopt an approximately series connection structure, while the reverse osmosis membrane tubes in the second filtration branch 25 adopt an approximately parallel connection structure. The two second filtration branches 25 operate in a one-in-use, one-on-standby mode.

[0071] Each second filtration branch (25) is also equipped with a high-pressure pump, which is located on the inlet side of the reverse osmosis membrane tube. The high-pressure pump is a CDMF32-100-2 (variable frequency) pump, whose parameters meet the 30m... 3 / h×138m×18.5KW.

[0072] Based on the above implementation scheme, although the reverse osmosis membrane tubes are C251 and D252 in this scheme description, in the actual configuration, reverse osmosis membrane tubes C251 and D252 are not just one membrane tube. In this scheme, reverse osmosis membrane tubes C251 and D252 are configured as three membrane tubes connected in series, and each membrane tube is also 8"×6 cores.

[0073] Based on the above implementation scheme, the second filtration unit 2 further includes two parallel pretreatment branches 22, the inlet end of which is connected to the outlet end of the first concentrate tank 21; the pretreatment branch 22 is equipped with a filter 221 and a second booster pump 222, the second booster pump 222 being located on the outlet side of the filter 221. The second booster pump 222 is a ZS65-40-200 / 5.5 pump, whose parameters meet the 30m³ / h requirement. 3 / h×35m×5.5KW. Filter 221 is a precision filter with parameters satisfying Q=30m 3 / h, 40"×5μm×20 pieces.

[0074] Based on the above implementation scheme, the second filtration unit 2 further includes a second dosing branch A23 and a second dosing branch B24. The second dosing branch A23 is connected to both pretreatment branches 22, and the connection point between the second dosing branch A23 and the pretreatment branches 22 is located on the inlet side of the filter 221. The second dosing branch B24 is also connected to both pretreatment branches 22, and the connection point between the second dosing branch B24 and the pretreatment branches 22 is located on the inlet side of the filter 221.

[0075] The second dosing branch A23 adopts a structure of one tank and two pumps. Its tank volume is 200L, and the corresponding dosing pump is AKS603 pump. The second dosing branch A23 is used to add scale inhibitor.

[0076] The second dosing branch B24 also has a structure of one tank and two pumps. Its dosing pump is an APG603 pump, and the tank is also a 200L capacity tank. The second dosing branch B24 is used to add acid.

[0077] The pipeline in this solution is also equipped with multiple flow meters, valves and other structures, which can be added as needed, and will not be described in detail here.

[0078] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0079] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0080] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0081] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0082] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0083] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A deep treatment system for heat treatment wastewater, characterized in that, It includes a first filter section and a second filter section; The first filter includes, The first filtration branch has several branches, and the inlet of each filtration branch is connected to the purified water outlet of the external ultrafiltration system. The first water production tank has its inlet end connected to the purified water outlet end of the first filtration branch; The second filter includes, The first concentrate tank has its inlet end connected to the concentrate outlet end of the first filter branch; The second filtration branch has several branches, and the inlet of the second filtration branch is connected to the outlet of the first concentrate tank. Both the first and second filtration branches are reverse osmosis filtration structures.

2. The deep treatment system for heat treatment wastewater as described in claim 1, characterized in that, The first filtration section has three first filtration branches and one first water production tank. The three first filtration branches are arranged in parallel pipeline structure, and the purified water outlet of each of the three first filtration branches is connected to the water inlet of the first water production tank.

3. The deep treatment system for heat treatment wastewater as described in claim 2, characterized in that, Each of the first filtering branches includes: The first booster pump has its inlet end connected to the purified water outlet end of the external ultrafiltration system via a pipeline. The first filter component is a reverse osmosis filter structure, and its inlet end is connected to the outlet end of the first booster pump.

4. The deep treatment system for heat treatment wastewater as described in claim 3, characterized in that, The first filtering component includes: The inlet end of the reverse osmosis membrane tube A is connected to the outlet end of the first booster pump via a pipeline; The inlet end of the reverse osmosis membrane tube B is connected to the concentrate outlet end of the reverse osmosis membrane tube A; The purified water outlets of both reverse osmosis membrane tube A and reverse osmosis membrane tube B are connected to the first product water tank; the concentrated water outlet of reverse osmosis membrane tube B is connected to the first concentrated water tank.

5. The deep treatment system for heat treatment wastewater as described in claim 4, characterized in that, The first filtering unit further includes: The first dosing branch A includes a first dosing tank A, which is connected to each of the first filtration branches via a pump and pipelines. The connection between the first dosing branch A and the first filtration branch is located on the inlet side of the first booster pump.

6. The deep treatment system for heat treatment wastewater as described in claim 5, characterized in that, The first filtering unit further includes: The first dosing branch B includes a first dosing tank B, which is connected to each of the first filtration branches via a pump and pipelines. The connection point between the first dosing branch B and the first filtration branch is located on the inlet side of the first booster pump.

7. The deep treatment system for heat treatment wastewater as described in claim 6, characterized in that, The second filter section further includes: The pretreatment branch has two parallel pipelines connected together, with the inlet of the pretreatment branch connected to the outlet of the first concentrate tank. The pretreatment branch is equipped with a filter and a second booster pump, with the second booster pump located on the outlet side of the filter.

8. The deep treatment system for heat treatment wastewater as described in claim 7, characterized in that, The second filter section further includes: The second dosing branch A is connected to both of the pretreatment branches, and the connection between the second dosing branch A and the pretreatment branches is located on the inlet side of the filter.

9. The deep treatment system for heat treatment wastewater as described in claim 8, characterized in that, The second filter section further includes: The second dosing branch B is connected to both of the pretreatment branches, and the connection point between the second dosing branch B and the pretreatment branches is located on the inlet side of the filter.

10. The deep treatment system for heat treatment wastewater as described in claim 7, characterized in that, The second filtration section has two second filtration branches; the two second filtration branches are connected in parallel; each second filtration branch includes: The reverse osmosis membrane tube C has an inlet end connected to the pretreatment branch, a purified water outlet end connected to the first product water tank, and a concentrate outlet end connected to the second concentrate tank. The reverse osmosis membrane tube D has its inlet end connected to the pretreatment branch, its purified water outlet end connected to the first product water tank, and its concentrate outlet end connected to the second concentrate tank.

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