Filtering device for water treatment and sewage treatment equipment with same

Abstract

The filtering device for water treatment and the sewage treatment equipment with the filtering device are used for filtering impurities generated by reaction of chemical elements to be removed in sewage, and the filtering device for water treatment comprises a plurality of filtering units, the liquid inlets are communicated in parallel between a liquid outlet of a front-stage device and a liquid inlet of a rear-stage device which are used for conveying sewage containing impurities; and the plurality of filtering units independently execute the filtering action. According to the filtering device for water treatment and the sewage treatment equipment with the filtering device, adverse effects of impurities generated by the preceding-stage device on the backward-stage device can be avoided, and the operation reliability and stability are high.

Description

Technical Field

[0001] The present disclosure relates to the field of sewage treatment, and particularly to a filtering device for water treatment and a sewage treatment device having the device. Background Art

[0002] During the treatment of sewage, especially rural sewage, when removing certain elements such as phosphorus from the sewage, a reactant is added to relevant sewage treatment devices, so that the reactant reacts with the above elements in the sewage to generate impurities that are insoluble or poorly soluble in water. If the above impurities are not discharged from the sewage in time, it will affect other treatment processes of the sewage after the elements are removed, and affect the reliability and stability of the operation of the sewage treatment device. Summary of the Invention

[0003] An advantage of the present disclosure is to provide a filtering device for water treatment and a sewage treatment device having the device, which can avoid the adverse effects of the impurities generated by the previous-stage device on the subsequent-stage device, and has high operation reliability and stability.

[0004] To achieve at least one of the above advantages of the present disclosure, the present disclosure provides a filtering device for water treatment, which is used to filter the impurities generated by the reaction of chemical elements to be removed in sewage. The filtering device for water treatment includes: a plurality of filtering units, which are connected in parallel between the liquid outlet of the previous-stage device for transporting sewage containing the impurities and the liquid inlet of the subsequent-stage device; and the plurality of filtering units perform filtering actions independently of each other.

[0005] According to an embodiment of the present disclosure, each of the filtering units includes: a housing, forming a cavity communicating with the liquid inlet and the liquid outlet; and a filter medium, provided in the cavity.

[0006] According to an embodiment of the present disclosure, the filter medium is detachably provided in the cavity.

[0007] According to an embodiment of the present disclosure, the housing is provided with a transparent observation window.

[0008] According to an embodiment of the present disclosure, the filter medium includes: a filter bag, sleeved in the cavity, and a filtering inlet communicating with the liquid outlet is formed at the top.

[0009] According to an embodiment of the present disclosure, it further includes: a plurality of inlet valves, which are provided one-to-one between the plurality of filtering units and the previous-stage device; and / or a plurality of outlet valves, which are provided one-to-one on the outlet pipelines of the plurality of filtering units.

[0010] The present disclosure also provides a sewage treatment device, including: a pre-stage device, including a reaction unit, forming a sewage conveyance cavity and a first chemical agent dosing port communicating with the sewage conveyance cavity, and the first chemical agent dosing port is for dosing a remover for reacting with chemical elements to be removed to form impurities; and the above-mentioned filtering device for water treatment, arranged after the reaction unit, for filtering out the impurities.

[0011] According to an embodiment of the present disclosure, it further includes a post-stage device communicating with the rear stage of the plurality of filtering units, and the post-stage device includes a membrane treatment unit.

[0012] According to an embodiment of the present disclosure, the pre-stage device further includes: a flocculation unit, arranged between the reaction unit and the filtering device, and provided with a second chemical agent dosing port for dosing a flocculant.

[0013] According to an embodiment of the present disclosure, the pre-stage device further includes: a water storage container, communicating with the reaction unit to provide sewage, and a filtering grille is arranged at the water inlet of the water storage container.

[0014] Advantageous effects:

[0015] (1) The filtering device for water treatment of the present disclosure and the sewage treatment device having the device can avoid the adverse effects of the impurities generated by the pre-stage device on the post-stage device, and have high operating reliability and stability.

[0016] (2) The filtering device for water treatment of the present disclosure and the sewage treatment device having the device are convenient for replacing the filter media.

[0017] (3) The filtering device for water treatment of the present disclosure and the sewage treatment device having the device are convenient for observing the condition of the filter media in a timely manner. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the sewage treatment device according to an embodiment of the present disclosure.

[0019] Figure 2 is a top view of the sewage treatment device of the present disclosure after removing part of the outer shell.

[0020] Figure 3 is a schematic structural diagram of a part of the sewage treatment device according to an embodiment of the present disclosure.

[0021] Figure 4 is Figure 2 a cross-sectional view along the A-A section line in

[0022] 100. Filtering device; 10. Filtering unit; 11. Outer shell; 1101. Cavity; 12. Filter media; 1201. Filtering inlet; 1202. Observation window; 20. Water inlet valve; 30. Water outlet valve;

[0023] 800, Prefilter device; 81, Reaction unit; 811, First pipeline mixer; 8101, First chemical dosing port; 812, Reagent container; 813, Reagent drive; 82, Flocculation unit; 821, Second pipeline mixer; 8201, Second chemical dosing port; 822, Flocculant container; 823, Flocculant drive; 83, Water storage unit; 831, Filter grille; 832, Lift drive

[0024] 900, Post-treatment device; 91, Membrane treatment unit; 92, Treatment container Detailed implementation manners

[0025] The following description is used to disclose the present disclosure so that those skilled in the art can implement the present disclosure. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art. The basic principles defined in the following description of the present disclosure can be applied to other implementation manners, variations, improvements, equivalent manners, and other technical solutions that do not depart from the spirit and scope of the present disclosure

[0026] Those skilled in the art should understand that in the disclosure of the present disclosure, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present disclosure

[0027] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "a" should not be construed as limiting the quantity

[0028] In the present disclosure, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances

[0029] In the related art, during the treatment of sewage, especially rural sewage, when removing certain elements such as phosphorus from the sewage, relevant technicians will put a reactant into relevant sewage treatment equipment, so that the reactant reacts with the above elements in the sewage to generate impurities that are insoluble or poorly soluble in water. If the above impurities are not discharged from the sewage in time, it will affect other treatment processes after the sewage removes elements, and affect the reliability and stability of the operation of the sewage treatment equipment.

[0030] Figure 1 It is a schematic structural diagram of the sewage treatment equipment according to an embodiment of the present disclosure. Figure 2 It is a top view of the sewage treatment equipment of the present disclosure after removing part of the outer shell. Refer to Figure 1 and Figure 2 In the embodiment of the present disclosure, the filtering device 100 for water treatment is used to be arranged between the liquid outlet of the front-stage device 800 and the liquid inlet of the rear-stage device 900 of the sewage treatment equipment.

[0031] Optionally, the front-stage device 800 includes a reaction unit 81. The reaction unit 81 forms a sewage delivery chamber and a first chemical agent injection port 8101 and the liquid outlet communicating with the sewage delivery chamber. The sewage delivery chamber is used for the chemical elements to be removed in the sewage to react with the reactant to form impurities that are insoluble or poorly soluble in water.

[0032] Optionally, the reaction unit 81 includes a first in-line mixer 811. The first in-line mixer 811 forms the sewage delivery chamber and the first chemical agent injection port 8101 and the liquid outlet communicating with the sewage delivery chamber. Thus, after the reactant enters the first in-line mixer 811, the reactant can be fully mixed with the sewage flowing through the first in-line mixer 811, so as to ensure that the reactant can fully contact and react with the chemical elements to be removed in the sewage.

[0033] Figure 3 It is a schematic structural diagram of a part of the structure of the sewage treatment equipment according to an embodiment of the present disclosure. Refer to Figure 2 and Figure 3 In the reaction unit 81, it further includes a reactant container 812 and a reactant driving member 813. The reactant container 812 is communicated with the first chemical agent injection port 8101 and is used to accommodate the reactant. The reactant driving member 813 is used to drive the reactant to flow from the reactant container 812 to the first chemical agent injection port 8101 to supply the reactant to the first chemical agent injection port 8101. Specifically, the reactant driving member 813 can be a reactant driving pump.

[0034] Exemplarily, the chemical element to be removed may be a phosphorus element. The reactant may be a phosphorus remover. Thus, when sewage containing phosphorus element, such as rural domestic sewage, enters the first pipe mixer 811, the reactant driving pump drives the phosphorus remover in the reactant container 812 to enter the first pipe mixer 811 through the first dosing port 8101, so that the phosphorus remover is fully mixed and contacted with the phosphorus element in the sewage and reacts, and then phosphorus-containing impurities suspended in the water are generated. At the same time, it can be understood that the chemical element to be removed and the reactant in the present disclosure include but are not limited to this. The element to be removed may also be other elements in the sewage, such as nitrogen element, etc. The reactant can be adaptively adjusted according to the different elements to be removed.

[0035] Optionally, referring to Figure 2 and Figure 3 , the pre-stage device further includes a flocculation unit 82. The flocculation unit 82 is arranged between the reaction unit 81 and the filtration device 100. The flocculation unit 82 forms a flocculation chamber communicating with the sewage delivery chamber and a second dosing port 8201 communicating with the flocculation chamber, and is used for coagulating the impurities before filtration. Thus, when the sewage output by the reaction unit 81 flows through the flocculation unit 82, the flocculant can cause the impurities suspended in the sewage to flocculate into larger flocs, which is convenient for subsequent filtration by the filtration device 100.

[0036] Optionally, the flocculation unit 82 includes a second pipe mixer 821. A flocculation chamber and a second dosing port 8201 communicating with the flocculation chamber are formed in the second pipe mixer 821. Thus, when the flocculant enters the second pipe mixer 821, the flocculant can be fully mixed with the sewage flowing through the second pipe mixer 821, so that the flocculant is fully contacted with the impurities in the sewage, and then the impurities can be fully flocculated.

[0037] Optionally, the pre-stage device further includes a flocculant container 822 and a flocculant driving member 823. The flocculant container 822 is communicated with the second dosing port 8201 and is used for accommodating the flocculant. The flocculant driving member 823 is used for driving the flocculant to flow from the flocculant container 822 to the second dosing port 8201 to supply the flocculant to the second dosing port 8201. Specifically exemplarily, the flocculation driving member may be a flocculant driving pump.

[0038] Optionally, when the chemical element to be removed is a phosphorus element and the reactant is a phosphorus remover, the flocculant can be polyacrylamide (PAM). Thus, when sewage containing phosphorus impurities, such as rural domestic sewage, enters the second pipeline mixer 821, the flocculant driving pump drives the PAM in the flocculant container 822 to enter the second pipeline mixer 821 through the second dosing port 8201, so that the impurities carried by the sewage in the second pipeline mixer 821 are flocculated to form larger flocs. At the same time, it can be understood that the chemical element to be removed and the flocculant in the present disclosure include but are not limited to this. The element to be removed can also be other elements in the sewage, such as nitrogen element, etc. The flocculant can also be adjusted accordingly.

[0039] Refer to Figure 2 and Figure 3 , the filtration device 100 for water treatment includes a plurality of filtration units 10. A plurality of the filtration units 10 are connected in parallel between the liquid outlet of the previous device 800 and the liquid inlet of the subsequent device 900.

[0040] It can be understood that the plurality means two or more. That is to say, the filtration device 100 includes two or more filtration units 10. Two or more filtration units 10 are arranged in parallel between the liquid outlet of the previous device and the liquid inlet of the subsequent device 900 to intercept the impurities independently of each other before the sewage is input from the previous device 800 to the subsequent device 900. Thus, the filtration device 100 in the embodiment of the present disclosure can not only intercept the impurities generated by the reaction in the previous device 800 and avoid the adverse effects of the impurities on the subsequent device 900, but also the plurality of filtration units 10 are arranged in parallel, so that even if one of the filtration units 10 is temporarily unable to operate, such as when it needs to be cleaned, replaced or repaired, another or other filtration units 10 can still be used normally, and the plurality of filtration units 10 can be used as backups for each other, thereby making the operation reliability of the filtration device 100 high.

[0041] Figure 4 is Figure 2 the sectional view under the A-A section line in. Refer to Figure 2 and Figure 4 , each filtration unit 10 includes a housing 11 and a filter medium 12. The housing 11 forms a cavity 1101 communicating with the liquid inlet of the previous device 800 and the liquid outlet of the subsequent device 900. The filter medium 12 is arranged in the cavity 1101. Thus, after the sewage flowing out from the liquid outlet of the previous device 800 flows into the housing 11, the filter medium 12 in the housing 11 filters the impurities carried by the sewage, thereby intercepting the impurities, and further reducing the impurities carried by the sewage when the sewage flows into the subsequent device 900.

[0042] Optionally, the filter medium 12 is detachably arranged in the cavity 1101. Thus, when the filter medium 12 is blocked due to intercepting impurities and needs to be cleaned, rinsed or repaired, the filter medium 12 can be conveniently replaced.

[0043] Optionally, the filter medium 12 includes a filter bag. The filter bag is sleeved in the cavity 1101, and a filter inlet 1201 communicating with the liquid outlet of the pre-stage device 800 is formed at the top. Specifically, the filter bag is made of cloth material. Thus, when the sewage carrying the impurities passes through the filter medium 12 for filtration, the sewage will first enter the interior of the filter bag through the filter inlet 1201 at the top, so as to intercept the impurities in the filter bag, and the filtered sewage will enter the gap between the filter bag and the housing 11 through the filter bag, and finally flow from the gap to the liquid inlet of the post-stage device 900.

[0044] Optionally, referring to Figure 3 , the housing 11 is provided with a transparent observation window 1202. Thus, relevant technicians can observe the situation of the filter medium 12 through the observation window 1202, such as whether it is blocked and whether it needs to be replaced.

[0045] Optionally, a transparent glass is provided at the observation window 1202, so that on the premise of not affecting the perspective function of the observation window 1202, it is difficult for the sewage to overflow from the observation window 1202 and it is difficult for the impurities in the external environment to enter the filtering unit 10 through the observation window 1202.

[0046] Optionally, referring to Figure 2 , the filtering device 100 for water treatment further includes a plurality of inlet valves 20 and a plurality of outlet valves 30. The plurality of inlet valves 20 are arranged one-to-one between the plurality of filtering units 10 and the reaction unit 81. The plurality of outlet valves 30 are arranged one-to-one on the plurality of outlet pipelines of the plurality of filtering units 10. Thus, when one of the filtering units 10 needs to be replaced, cleaned or repaired, the inlet valve 20 and the outlet valve 30 corresponding to the filtering unit 10 can be closed, so that the sewage will not pass through the filtering unit 10 temporarily. Since one or more other filtering units 10 are still in normal use at this time, the filtering device 100 as a whole still plays a filtering function and has high working reliability.

[0047] The present disclosure further provides sewage treatment equipment, including a pre-stage device 800 and the filtering device 100 for water treatment as described above. The filtering device 100 is arranged after the pre-stage device 800 and is used to filter out the impurities generated during the treatment of sewage by the pre-stage device 800.

[0048] Optionally, the pre-stage device 800 includes the reaction unit 81 mentioned above or the reaction unit 81 and the flocculation unit 82 mentioned above.

[0049] Optionally, referring to Figure 2 and Figure 3 , the pre-stage device further includes a water storage unit 83. The water storage unit 83 includes a water storage container 831. The water storage container 831 is communicated with the sewage conveying cavity of the reaction unit 81 to supply sewage to the sewage conveying cavity, and a filter grille 832 is provided at the water inlet of the water storage container 831. Specifically, the water storage container 831 may be an adjustment tank. Thus, when sewage such as rural domestic sewage is discharged, it can be discharged to the water inlet of the water storage container 831, so that the sewage enters the interior of the water storage container 831 through the filter grille 832 and is temporarily stored by the water storage container 831, ensuring relatively uniform and stable water quality for subsequent treatment. The filter grille 832 is beneficial to intercept large-volume sludge or large-volume floating objects carried in the sewage and can preliminarily filter the sewage before temporarily storing it.

[0050] Optionally, the water storage unit 83 further includes a lifting driving member 833. The lifting driving member 833 is arranged in the water storage container 831 and is used to drive sewage to flow from the water storage container 831 to the sewage conveying cavity of the reaction unit 81.

[0051] Optionally, referring to Figure 2 , the post-stage device 900 includes a membrane treatment unit 91. The membrane treatment unit 91 forms the liquid inlet. Thus, after the sewage treated by the pre-stage device 800 enters the membrane treatment unit 91, it can be further filtered by the membrane treatment unit 91, thereby reducing harmful impurities in the sewage.

[0052] Specifically, the membrane treatment unit 91 includes an aerated membrane bioreactor. Specifically, the aerated membrane bioreactor is an MBR membrane bioreactor. The membrane treatment unit 91 may be arranged in a treatment container 92 such as a treatment tank, and the treatment container 92 forms the liquid inlet. Thus, after the sewage treated by the pre-stage device 800 enters the treatment tank, after the microorganisms in the treatment tank are provided with air by the aerated membrane bioreactor, the microorganisms can grow well on the membrane surface, so that the sewage flowing through the MBR membrane bioreactor can not only be filtered by it, but also the harmful substances in the water can be well absorbed and degraded by the microorganisms.

[0053] The filtration device 100 for water treatment according to the embodiments of the present disclosure is disposed between the above-mentioned pre-stage device 800 and the post-stage device 900, and is used to intercept the impurities generated by the reaction when the pre-stage device 800 removes the chemical elements to be removed, so as to reduce the content of impurities in the sewage entering the post-stage device 900, avoid the adverse effects of the impurities generated during the sewage treatment process of the pre-stage device 800 on the post-stage device 900, ensure the smooth progress of the treatment process of the post-stage device 900, and improve the operation reliability and stability of the sewage treatment equipment.

[0054] Specifically, when the post-stage device 900 includes an aerated membrane - bioreactor membrane, if a large amount of water-insoluble impurities generated by the above reaction are carried by the sewage into the membrane treatment unit 91, a large amount of impurities will adhere to the membrane, affecting the filtration performance and aeration performance of the aerated membrane - bioreactor, and resulting in a poor treatment effect of the aerated membrane - bioreactor membrane on the sewage. However, the filtration device 100 for water treatment according to the present disclosure can make it difficult for the impurities to reach the aerated membrane - bioreactor membrane, ensure the aeration performance and filtration performance of the aerated membrane - bioreactor membrane when treating sewage, and ensure the biological treatment effect on the sewage.

[0055] Those skilled in the art should understand that the embodiments of the present disclosure described above and shown in the drawings are only examples and do not limit the present disclosure. The advantages of the present disclosure have been fully and effectively realized. The functions and structural principles of the present disclosure have been shown and described in the embodiments, and without departing from the above principles, the embodiments of the present disclosure can have any deformation or modification.

Claims

1. A filtering device for water treatment, characterized in that: Used to filter impurities generated by the reaction of chemical elements to be removed in sewage, the filtering device for water treatment includes: A plurality of filter units are connected and arranged in parallel between the liquid outlet of the front-stage device for conveying sewage containing the impurities and the liquid inlet of the rear-stage device; and the plurality of filter units perform filtering actions independently of each other.

2. The filtering device for water treatment according to claim 1, characterized in that: The filtering units all include: a housing forming a cavity communicating with the liquid inlet and the liquid outlet; and The filter material is arranged in the cavity.

3. The filtering device for water treatment according to claim 2, characterized in that: The filter material is detachably arranged in the cavity.

4. The filtering device for water treatment according to claim 2, characterized in that: The shell is provided with a see-through observation window.

5. The filtering device for water treatment according to claim 2, characterized in that: The filter material comprises: a filter bag arranged in the cavity to form a filter inlet communicated with the liquid outlet.

6. The filtering device for water treatment according to claim 1, characterized in that: Also includes: A plurality of water inlet valves are disposed one by one between the plurality of the filter units and the pre-stage device; and / or A plurality of water outlet valves are arranged one by one on the water outlet pipes of the plurality of filter units.

7. Sewage treatment equipment, characterized in that, include: The front-stage device includes a reaction unit, forming a sewage conveying chamber and a first dosing port connected to the sewage conveying chamber, wherein the first dosing port is used to put in a remover for reacting with the chemical element to be removed to form impurities; The filtering device for water treatment according to any one of claims 1 to 6 is arranged after the reaction unit and is used to filter out the impurities.

8. The sewage treatment equipment according to claim 7, characterized in that: It also includes a subsequent device connected to the subsequent stages of the plurality of filtration units, wherein the subsequent device includes a membrane treatment unit.

9. The sewage treatment equipment according to claim 7, characterized in that: The front-stage device further comprises: a flocculation unit, which is arranged between the reaction unit and the filtering device and is provided with a second dosing port for dosing a flocculant.

10. The sewage treatment equipment according to claim 7, characterized in that: The front-stage device also includes: a water storage container, which is connected to the reaction unit to provide sewage, and a filter grid is provided at the water inlet of the water storage container.

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